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Kim Y, Son K, Han S, Seong D, Lee E, Lee KB, Jeon M, Kim J. A depth-resolved quantitative evaluation method for non-carious cervical lesions treatment with optical coherence tomography. J Dent 2024; 144:104894. [PMID: 38521238 DOI: 10.1016/j.jdent.2024.104894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 02/16/2024] [Accepted: 02/19/2024] [Indexed: 03/25/2024] Open
Abstract
OBJECTIVES The aim of this study is prognostic assessment of surface smoothness and the presence of internal bubbles after treatment of non-cancerous cervical lesions (NCCLs) using optical coherence tomography (OCT). METHODS After treatment with NCCLs, cross-sectional images of the lesion parts of the sample were non-invasively acquired and analyzed. The surface smoothness between tooth and resin, resin and cemento-enamel junction, and the presence bubble inside resin was confirmed. In addition, using an algorithm that distinguishes between resin and dental structure based on OCT cross-sectional images, we quantitatively analyzed the amount of resin used in treating NCCLs and acquired 3D images. RESULTS The inner structure of the resin in each sample was checked, and the presence of bubbles was confirmed. In addition, the resin sections were separated from the tomographic images acquired by OCT to visualize 3D images. The volume of resin used in the treatment part of each NCCLs samples was quantitatively analyzed as 3.7216 ∼ 14.889 mm3. CONCLUSIONS OCT is able to measure not only the surface abrasion provided by existing intraoral scanner, but also the size and depth location of interal bubbles, which is distinctive advantage of our method. Based on our results, OCT is a significant tool for qualitative and quantitative analysis of dental NCCLs treatment before and after treatment. CLINICAL SIGNIFICANCE The study used OCT, a non-destructive diagnostic, to reveal the structure of the resin and the location and size of bubbles after NCCLs treatment. These findings could be golden standard in determining the prognosis of NCCLs treatment.
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Affiliation(s)
- Yoonseok Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Keunbada Son
- Advanced Dental Device Development Institute (A3DI), Kyungpook National University, 2177 Dalgubeol-dero, Jung-gu, Daegu, 41940, Republic of Korea.
| | - Sangyeob Han
- ICT Convergence Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Daewoon Seong
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Euimin Lee
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Kyu-Bok Lee
- Advanced Dental Device Development Institute (A3DI), Kyungpook National University, 2177 Dalgubeol-dero, Jung-gu, Daegu, 41940, Republic of Korea; Department of Prosthodontics, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-dero, Jung-gu, Daegu, 41940, Republic of Korea.
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.
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Saleah SA, Kim S, Luna JA, Wijesinghe RE, Seong D, Han S, Kim J, Jeon M. Optical Coherence Tomography as a Non-Invasive Tool for Plant Material Characterization in Agriculture: A Review. Sensors (Basel) 2023; 24:219. [PMID: 38203080 PMCID: PMC10781338 DOI: 10.3390/s24010219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 12/23/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024]
Abstract
Characterizing plant material is crucial in terms of early disease detection, pest control, physiological assessments, and growth monitoring, which are essential parameters to increase production in agriculture and prevent unnecessary economic losses. The conventional methods employed to assess the aforementioned parameters have several limitations, such as invasive inspection, complexity, high time consumption, and costly features. In recent years, optical coherence tomography (OCT), which is an ultra-high resolution, non-invasive, and real-time unique image-based approach has been widely utilized as a significant and potential tool for assessing plant materials in numerous aspects. The obtained OCT cross-sections and volumetrics, as well as the amplitude signals of plant materials, have the capability to reveal vital information in both axial and lateral directions owing to the high resolution of the imaging system. This review discusses recent technological trends and advanced applications of OCT, which have been potentially adapted for numerous agricultural applications, such as non-invasive disease screening, optical signals-based growth speed detection, the structural analysis of plant materials, and microbiological discoveries. Therefore, this review offers a comprehensive exploration of recent advanced OCT technological approaches for agricultural applications, which provides insights into their potential to incorporate OCT technology into numerous industries.
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Affiliation(s)
- Sm Abu Saleah
- ICT Convergence Research Center, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Shinheon Kim
- Institute of Biomedical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jannat Amrin Luna
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea; (J.A.L.)
| | - Ruchire Eranga Wijesinghe
- Department of Electrical and Electronic Engineering, Faculty of Engineering, Sri Lanka Institute of Information Technology, Malabe 10115, Sri Lanka
| | - Daewoon Seong
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea; (J.A.L.)
| | - Sangyeob Han
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea; (J.A.L.)
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea; (J.A.L.)
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea; (J.A.L.)
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Son K, Koo B, Lee W, Cho M, Lee HC, Kim KH, Jeong H, Jeon M, Kim J, Lee KB. A concept to detect a subgingival finish line using an intraoral optical coherence tomography system: A clinical report. J Prosthet Dent 2023:S0022-3913(23)00696-0. [PMID: 37957063 DOI: 10.1016/j.prosdent.2023.09.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 11/15/2023]
Abstract
This clinical report introduces an approach for detecting the supragingival finish line by penetrating the teeth and gingival tissue using optical coherence tomography (OCT) technology. This approach was used in 3 patients who underwent tooth preparation with a subgingival finish line. Consequently, the subgingival finish line, typically challenging to discern clearly in intraoral scans, was identifiable in the OCT image.
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Affiliation(s)
- KeunBaDa Son
- Research Professor, Advanced Dental Device Development Institute, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Boncheol Koo
- Doctoral Candidate, Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Weonjoon Lee
- Executive Director, Ossvis Co., Ltd., Anyang-si, Republic of Korea
| | - Minsoo Cho
- Principal Engineer, Huvitz Co., Ltd., Anyang-si, Republic of Korea
| | - Han Chul Lee
- Principal Engineer, Huvitz Co., Ltd., Anyang-si, Republic of Korea
| | - Kyoung Ho Kim
- Principal Engineer, Huvitz Co., Ltd., Anyang-si, Republic of Korea
| | - Hyosang Jeong
- Senior Engineer, Huvitz Co., Ltd., Anyang-si, Republic of Korea
| | - Mansik Jeon
- Associate Professor, School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Jeehyun Kim
- Professor, School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Kyu-Bok Lee
- Professor, Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.
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Kim H, Kang D, Seong D, Saleah SA, Luna JA, Kim Y, Kim H, Han S, Jeon M, Kim J. Skin pore imaging using spectral-domain optical coherence tomography: a case report. Biomed Eng Lett 2023; 13:729-737. [PMID: 37872989 PMCID: PMC10590360 DOI: 10.1007/s13534-023-00290-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 05/15/2023] [Accepted: 05/25/2023] [Indexed: 10/25/2023] Open
Abstract
Sebum is an important component of the skin that has attracted attention in many fields, including dermatology and cosmetics. Pore expansion due to sebum on the skin can lead to various problems. Therefore, it is necessary to analyze the morphological characteristics of sebum. In this study, we used optical coherence tomography (OCT) to evaluate facial sebum areas. We obtained the OCT maximum amplitude projection (MAP) image and a cross-sectional image of skin pores in the facial area. Subsequently, we detected the sebum in skin pores using the detection algorithm of the ImageJ software to quantitatively determine the size of randomly selected pores in the proposed MAP images. Additionally, the pore size was analyzed by acquiring images before and after facial sebum extraction. According to our research, facial sebum can be morphologically described using the OCT system. Since OCT imaging enables specific analysis of skin parameters, including pores and sebum, skin analysis employing OCT could be an effective method for further research.
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Affiliation(s)
- Hyunmo Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Dongwan Kang
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Daewoon Seong
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Sm Abu Saleah
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Jannat Amrin Luna
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Yoonseok Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Hayoung Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Sangyeob Han
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
- School of Medicine, Institute of Biomedical Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu, 41566 Republic of Korea
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Kilian HI, Zhang H, Shiraz Bhurwani MM, Nilam AM, Seong D, Jeon M, Ionita CN, Xia J, Lovell JF. Barium sulfate and pigment admixture for photoacoustic and x-ray contrast imaging of the gut. J Biomed Opt 2023; 28:082803. [PMID: 36776721 PMCID: PMC9917716 DOI: 10.1117/1.jbo.28.8.082803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 01/13/2023] [Indexed: 06/18/2023]
Abstract
Significance X-ray imaging is frequently used for gastrointestinal imaging. Photoacoustic imaging (PAI) of the gastrointestinal tract is an emerging approach that has been demonstrated for preclinical imaging of small animals. A contrast agent active in both modalities could be useful for imaging applications. Aim We aimed to develop a dual-modality contrast agent comprising an admixture of barium sulfate with pigments that absorb light in the second near-infrared region (NIR-II), for preclinical imaging with both x-ray and PAI modalities. Approach Eleven different NIR-II dyes were evaluated after admixture with a 40% w/v barium sulfate mixture. The resulting NIR-II absorption in the soluble fraction and in the total mixture was characterized. Proof-of-principle imaging studies in mice were carried out. Results Pigments that produced more uniform suspensions were assessed further for photoacoustic contrast signal at a wavelength of 1064 nm that corresponds to the output of the Nd:YAG laser used. Phantom imaging studies demonstrated that the pigment-barium sulfate mixture generated imaging contrast in both x-ray and PAI modalities. The optimal pigment selected for further study was a cyanine tetrafluoroborate salt. Ex-vivo and whole-body mouse imaging demonstrated that photoacoustic and x-ray contrast signals co-localized in the intestines for both imaging modalities. Conclusion These data demonstrate that commercially-available NIR-II pigments can simply be admixed with barium sulfate to generate a dual-modality contrast agent appropriate for small animal gastrointestinal imaging.
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Affiliation(s)
- Hailey I Kilian
- University at Buffalo, State University of New York, Department of Biomedical Engineering, Buffalo, New York, United States
| | - Huijuan Zhang
- University at Buffalo, State University of New York, Department of Biomedical Engineering, Buffalo, New York, United States
| | - Mohammad Mahdi Shiraz Bhurwani
- University at Buffalo, State University of New York, Department of Biomedical Engineering, Buffalo, New York, United States
- Canon Stroke and Vascular Research Center, Buffalo, New York, United States
| | - Anoop M Nilam
- University at Buffalo, State University of New York, Department of Biomedical Engineering, Buffalo, New York, United States
| | - Daewoon Seong
- Kyungpook National University, College of IT Engineering, School of Electronic and Electrical Engineering, Daegu, Republic of Korea
| | - Mansik Jeon
- Kyungpook National University, College of IT Engineering, School of Electronic and Electrical Engineering, Daegu, Republic of Korea
| | - Ciprian N Ionita
- University at Buffalo, State University of New York, Department of Biomedical Engineering, Buffalo, New York, United States
- Canon Stroke and Vascular Research Center, Buffalo, New York, United States
| | - Jun Xia
- University at Buffalo, State University of New York, Department of Biomedical Engineering, Buffalo, New York, United States
| | - Jonathan F Lovell
- University at Buffalo, State University of New York, Department of Biomedical Engineering, Buffalo, New York, United States
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Seong D, Lee E, Kim Y, Han S, Lee J, Jeon M, Kim J. Three-dimensional reconstructing undersampled photoacoustic microscopy images using deep learning. Photoacoustics 2023; 29:100429. [PMID: 36544533 PMCID: PMC9761854 DOI: 10.1016/j.pacs.2022.100429] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/29/2022] [Accepted: 11/28/2022] [Indexed: 05/31/2023]
Abstract
Spatial sampling density and data size are important determinants of the imaging speed of photoacoustic microscopy (PAM). Therefore, undersampling methods that reduce the number of scanning points are typically adopted to enhance the imaging speed of PAM by increasing the scanning step size. Since undersampling methods sacrifice spatial sampling density, by considering the number of data points, data size, and the characteristics of PAM that provides three-dimensional (3D) volume data, in this study, we newly reported deep learning-based fully reconstructing the undersampled 3D PAM data. The results of quantitative analyses demonstrate that the proposed method exhibits robustness and outperforms interpolation-based reconstruction methods at various undersampling ratios, enhancing the PAM system performance with 80-times faster-imaging speed and 800-times lower data size. The proposed method is demonstrated to be the closest model that can be used under experimental conditions, effectively shortening the imaging time with significantly reduced data size for processing.
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Affiliation(s)
- Daewoon Seong
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Euimin Lee
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Yoonseok Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Sangyeob Han
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
- Institute of Biomedical Engineering, School of Medicine, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jaeyul Lee
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
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7
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Saleah SA, Seong D, Wijesinghe RE, Han S, Kim S, Jeon M, Kim J. Development of a deviated focusing-based optical coherence microscope with a variable depth of focus for high-resolution imaging. Opt Express 2023; 31:1258-1268. [PMID: 36785165 DOI: 10.1364/oe.479709] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 12/12/2022] [Indexed: 06/18/2023]
Abstract
The aim of this study was to develop an optically deviated focusing-based variable depth-of-focus (DOF) oriented optical coherence microscopy (OCM) system to improve the DOF in high-resolution and precise focused imaging. In this study, an approach of varying beam diameter using deviated focusing was employed in the sample arm to enhance the DOF and to confirm precise focusing in OCM imaging. The optically deviated focusing technique was used to vary the focal point and DOF by altering the sample arm beam. The efficacy of the variable DOF imaging approach utilizing an optimized sample arm was confirmed by tissue-level imaging, where OCM images with varying DOF were obtained using deviated focusing. Experimentally confirmed lateral resolution of 2.19 µm was sufficient for the precise non-invasive visualization of abnormalities of fruit specimens. Thus, the proposed variable DOF-OCM system can be an alternative for precisely focused, high-resolution, and variable DOF imaging by improving the DOF in minimum lateral resolution variation.
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Seong D, Yi S, Han S, Lee J, Park S, Hwang YH, Kim J, Kim HK, Jeon M. Target ischemic stroke model creation method using photoacoustic microscopy with simultaneous vessel monitoring and dynamic photothrombosis induction. Photoacoustics 2022; 27:100376. [PMID: 35734368 PMCID: PMC9207728 DOI: 10.1016/j.pacs.2022.100376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 06/02/2022] [Indexed: 06/02/2023]
Abstract
The ischemic stroke animal model evaluates the efficacy of reperfusion and neuroprotective strategies for ischemic injuries. Various conventional methods have been reported to induce the ischemic models; however, controlling specific neurological deficits, mortality rates, and the extent of the infarction is difficult as the size of the affected region is not precisely controlled. In this paper, we report a single laser-based localized target ischemic stroke model development method by simultaneous vessel monitoring and photothrombosis induction using photoacoustic microscopy (PAM), which has minimized the infarct size at precise location with high reproducibility. The proposed method has significantly reduced the infarcted region by illuminating the precise localization. The reproducibility and validity of suggested method have been demonstrated through repeated experiments and histological analyses. These results demonstrate that our method can provide the ischemic stroke model closest to the clinical pathology for brain ischemia research from inducement, occurrence mechanisms to the recovery process.
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Affiliation(s)
- Daewoon Seong
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, the Republic of Korea
| | - Soojin Yi
- Bio-Medical Institute, Kyungpook National University Hospital, Daegu 41404, the Republic of Korea
- Department of Ophthalmology, School of Medicine, Kyungpook National University, Daegu 41944, the Republic of Korea
- Department of Biomedical Science, The Graduate School, Kyungpook National University, Daegu 41944, the Republic of Korea
| | - Sangyeob Han
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, the Republic of Korea
- Institute of Biomedical Engineering, School of Medicine, Kyungpook National University, Daegu 41566, the Republic of Korea
| | - Jaeyul Lee
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, the Republic of Korea
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Sungjo Park
- Pohang Innotown Center, Pohang University of Science and Technology, Pohang 37673, the Republic of Korea
| | - Yang-Ha Hwang
- Department of Neurology, School of Medicine, Kyungpook National University, Daegu 41944, the Republic of Korea
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, the Republic of Korea
| | - Hong Kyun Kim
- Bio-Medical Institute, Kyungpook National University Hospital, Daegu 41404, the Republic of Korea
- Department of Ophthalmology, School of Medicine, Kyungpook National University, Daegu 41944, the Republic of Korea
- Department of Biomedical Science, The Graduate School, Kyungpook National University, Daegu 41944, the Republic of Korea
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, the Republic of Korea
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Son K, Cho H, Kim H, Lee W, Cho M, Jeong H, Kim KH, Lee DH, Kim SY, Lee KB, Jeon M, Kim J. Dental diagnosis for inlay restoration using an intraoral optical coherence tomography system: A case report. J Prosthodont Res 2022; 67:305-310. [PMID: 35665697 DOI: 10.2186/jpr.jpr_d_22_00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PATIENTS The patient was a 32-year-old man who underwent amalgam restoration of the mandibular right second molar. An amalgam restoration fracture was diagnosed by intraoral optical coherence tomography (OCT), and pulp exposure was examined during cavity preparation. Subsequently, a definitive ceramic restoration was fabricated, and the marginal fit in the oral cavity was evaluated using the OCT system. DISCUSSION The existing OCT system cannot acquire images inside the oral cavity because of the large probe size. However, the proposed intraoral OCT system can access the prostheses in the mandibular right second molar. Therefore, dental diagnosis for restoration treatment with dental prosthesis fracture, marginal gap, and pulp exposure after tooth preparation is possible using the proposed intraoral OCT system. CONCLUSIONS The use of the intraoral OCT system improved dental diagnosis by allowing the dentist to confirm quantitative values through cross-sectional images, rather than that by determining a treatment plan after visual dental diagnosis.
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Affiliation(s)
- Keunbada Son
- Advanced Dental Device Development Institute (A3DI), Kyungpook National University, 2177 Dalgubeol-daero, Jung-gu, Daegu 41940, Republic of Korea
| | - Hoseong Cho
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Hayoung Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Weonjoon Lee
- Huvitz Co., Ltd., 38, Burim-ro 170beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14055, Republic of Korea
| | - Minsoo Cho
- Huvitz Co., Ltd., 38, Burim-ro 170beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14055, Republic of Korea
| | - Hyosang Jeong
- Huvitz Co., Ltd., 38, Burim-ro 170beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14055, Republic of Korea
| | - Kyoung Ho Kim
- Huvitz Co., Ltd., 38, Burim-ro 170beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14055, Republic of Korea
| | - Du-Hyeong Lee
- Department of Prosthodontics, School of Dentistry, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-daero, Jung-gu, Daegu 41940, Republic of Korea
| | - So-Yeun Kim
- Department of Prosthodontics, School of Dentistry, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-daero, Jung-gu, Daegu 41940, Republic of Korea
| | - Kyu-Bok Lee
- Advanced Dental Device Development Institute (A3DI), Kyungpook National University, 2177 Dalgubeol-daero, Jung-gu, Daegu 41940, Republic of Korea.,Department of Prosthodontics, School of Dentistry, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-daero, Jung-gu, Daegu 41940, Republic of Korea
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.,School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.,School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
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Lee J, Wijesinghe RE, Jeon M, Kim J. Non-destructive morphological observation of anatomical growth process in Haemaphysalis Longicornis tick specimens using optical coherence tomography. Technol Health Care 2022; 30:61-70. [PMID: 35124584 PMCID: PMC9028609 DOI: 10.3233/thc-228006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND: Ticks are known as the representatives of hematophagous arachnids. They cause various tick-borne diseases, such as severe fever with thrombocytopenia syndrome (SFTS) and Lyme disease. To understand the mechanism of virus infection caused by ticks, morphology for the anatomical characteristics of crucial organs has been widely studied in acarological fields. The conventional methods used for tick observation have inevitable limitations. Dissection is the standard method to obtain the morphological information, and complex microscopy methods were utilized alternatively. OBJECTIVE: The study goal is to obtain the morphological information of ticks in different growth stages non-invasively. METHODS: Optical coherence tomography (OCT) is employed to acquire structural images of various internal organs without damage for observing the growth process of larva, nymph, and adult in Haemaphysalis longicornis ticks in real-time. RESULTS: Various internal organs, such as salivary glands, rectal sac, genital aperture, and anus, were well-visualized by the OCT enface and cross-sectional images, and the variation in size of these organs in each growth stage was compared quantitatively. CONCLUSIONS: Based on the obtained results, we confirmed the potential feasibility of OCT as a non-destructive real-time tool for morphological studies in acarology. Further research using OCT for acarological applications can include monitoring the growth process of ticks in terms of structural changes and investigating morphological differences between normal and virus-infected tick specimens.
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Affiliation(s)
- Junsoo Lee
- School of Electronic and Electrical Engineering, Graduate School, Kyungpook National University, Daegu, Korea
| | - Ruchire Eranga Wijesinghe
- Department of Materials and Mechanical Technology, Faculty of Technology, University of Sri Jayewardenepura, Pitipana, Homagama, Sri Lanka
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, Graduate School, Kyungpook National University, Daegu, Korea
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, Graduate School, Kyungpook National University, Daegu, Korea
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11
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Kim Y, Jeon M, Song M, Kwon B, Lim S, Lee Y, Park J, Cho Y, Yoon H, Lee K, Lee J, Lee C. OA19.03 Differences in Detection Patterns, Characteristics, and Outcomes of Central and Peripheral Lung Cancers in Low-Dose CT Screening. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Kim Y, Jung GI, Jeon D, Wijesinghe RE, Seong D, Lee J, Do WJ, Kwon SM, Lee JH, Hwang JH, Kim HD, Lee KB, Jeon M, Kim J. Non-Invasive Optical Coherence Tomography Data-Based Quantitative Algorithm for the Assessment of Residual Adhesive on Bracket-Removed Dental Surface. Sensors (Basel) 2021; 21:4670. [PMID: 34300410 PMCID: PMC8309505 DOI: 10.3390/s21144670] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/30/2021] [Accepted: 07/05/2021] [Indexed: 11/17/2022]
Abstract
The aim of this study was to quantitatively assess the residual adhesive on orthodontic ceramic bracket-removed dental surface. In orthodontic process, ceramic bracket was repeated debonding physically, then the adhesive remained on the dental surface. The residual adhesive caused a lack of adhesive strength between dental and ceramic bracket. Since commonly used adhesive in orthodontics is translucent, residual adhesive is hard to be detected with conventional microscopes. Therefore, 1310 nm center wavelength swept-source OCT system based on laboratory customized image processing algorithm was used for the precise detection of residual adhesive on tooth surface. The algorithm separates residual adhesive from dental surface by comparing the height of adjacent B-scan images, while providing color-scaled images emphasizing the thickness information of residual adhesive. Finally, the acquired results were compared with microscopic and adhesive remnant index scoring gold standards, while the comparison confirmed the potential merits and the improvements of the proposed method over gold standards.
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Affiliation(s)
- Yoonseok Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Gu-In Jung
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Deokmin Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Ruchire Eranga Wijesinghe
- Department of Materials and Mechanical Technology, Faculty of Technology, University of Sri Jayewardenepura, Pitipana, Homagama 10200, Sri Lanka;
| | - Daewoon Seong
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Jaeyul Lee
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Woo Jong Do
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Sung-Min Kwon
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Jong Hoon Lee
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Jun Ho Hwang
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Hyun Deok Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Kyu-Bok Lee
- Advanced Dental Device Development Institute, Kyungpook National University, Daegu 41940, Korea;
- Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu 41940, Korea
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
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Ravichandran NK, Lakshmikantha HT, Park HS, Jeon M, Kim J. Micron-scale human enamel layer characterization after orthodontic bracket debonding by intensity-based layer segmentation in optical coherence tomography images. Sci Rep 2021; 11:10831. [PMID: 34035385 PMCID: PMC8149424 DOI: 10.1038/s41598-021-90354-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 05/10/2021] [Indexed: 11/09/2022] Open
Abstract
In clinical orthodontic practice, fixed brackets are widely used for tooth movement and adjustments. Although years of research and development have improved the workability of fixed orthodontic brackets, there are still controversies regarding its plausible destructive influence on the enamel surface of tooth. This, in turn, makes the quantitative assessment of the enamel surface after specific orthodontic treatment procedures important in order to opt for the most effective treatment procedure. Through this study, we show the practical applicability of optical coherence tomography (OCT) as a non-ionizing and nondestructive assessment tool for measuring enamel loss after each step of orthodontic bracket bonding. Two-dimensional and volumetric OCT images are used for the evaluation of the tooth enamel. From the depth intensity profile analysis of cross-sectional OCT images, the changes in the individual internal layer thickness are calculated. A software algorithm was developed to evaluate the structural connectivity in the enamel for analyzing enamel loss on the tooth surface and for detecting enamel abrasion. An intensity-based layer segmentation algorithm is also developed to analyze and evaluate enamel wear in the tooth after each step. Using the proposed algorithms, the total enamel present after each treatment procedure was measured and tabulated for analysis.
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Affiliation(s)
- Naresh Kumar Ravichandran
- School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566, Republic of Korea.,Center for Scientific Instrumentation, Korea Basic Science Institute, 169148 Gwahakro Yuseonggu, Daejeon, 34133, Republic of Korea
| | | | - Hyo-Sang Park
- Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, 41940, Republic of Korea
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566, Republic of Korea.
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566, Republic of Korea
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14
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Saleah SA, Seong D, Han S, Wijesinghe RE, Ravichandran NK, Jeon M, Kim J. Integrated Quad-Scanner Strategy-Based Optical Coherence Tomography for the Whole-Directional Volumetric Imaging of a Sample. Sensors (Basel) 2021; 21:1305. [PMID: 33670358 PMCID: PMC7918791 DOI: 10.3390/s21041305] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/07/2021] [Accepted: 02/08/2021] [Indexed: 01/01/2023]
Abstract
Whole-directional scanning methodology is required to observe distinctive features of an entire physical structure with a three dimensional (3D) visualization. However, the implementation of whole-directional scanning is challenging for conventional optical coherence tomography (OCT), which scans a limited portion of the sample by utilizing unidirectional and bidirectional scanning methods. Therefore, in this paper an integrated quad-scanner (QS) strategy-based OCT method was implemented to obtain the whole-directional volumetry of a sample by employing four scanning arms installed around the sample. The simultaneous and sequential image acquisition capabilities are the conceptual key points of the proposed QS-OCT method, and were implemented using four precisely aligned scanning arms and applied in a complementary way according to the experimental criteria. To assess the feasibility of obtaining whole-directional morphological structures, a roll of Scotch tape, an ex vivo mouse heart, and kidney specimens were imaged and independently obtained tissue images at different directions were delicately merged to compose the 3D volume data set. The results revealed the potential merits of QS-OCT-based whole-directional imaging, which can be a favorable inspection method for various discoveries that require the dynamic coordinates of the whole physical structure.
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Affiliation(s)
- Sm Abu Saleah
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.A.S.); (D.S.); (S.H.)
| | - Daewoon Seong
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.A.S.); (D.S.); (S.H.)
| | - Sangyeob Han
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.A.S.); (D.S.); (S.H.)
- Institute of Biomedical Engineering, School of Medicine, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea
| | - Ruchire Eranga Wijesinghe
- Department of Materials and Mechanical Technology, Faculty of Technology, University of Sri Jayewardenepura, Pitipana, Homagama 10200, Sri Lanka;
| | - Naresh Kumar Ravichandran
- Center for Scientific Instrumentation, Korea Basic Science Institute, 169-148, Gwahak-ro Yuseong-gu, Daejeon 34133, Korea;
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.A.S.); (D.S.); (S.H.)
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.A.S.); (D.S.); (S.H.)
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15
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Saleah SA, Kim P, Seong D, Wijesinghe RE, Jeon M, Kim J. A preliminary study of post-progressive nail-art effects on in vivo nail plate using optical coherence tomography-based intensity profiling assessment. Sci Rep 2021; 11:666. [PMID: 33436674 PMCID: PMC7804019 DOI: 10.1038/s41598-020-79497-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 11/11/2020] [Indexed: 01/29/2023] Open
Abstract
Nail beautification is a widely applied gender independent practice. Excessive nail beautifications and nail-arts have a direct impact on the nail structure and can cause nail disorders. Therefore, the assessment of post-progressive nail-art effects on the nail is essential to maintain optimal nail health and to avoid any undesirable disorders. In this study, in vivo nails were examined in control stage, with a nail-art stage, and after removing the nail-art stage using a 1310 nm spectral-domain optical coherence tomography (SD-OCT) system. The acquired cross-sectional OCT images were analyzed by a laboratory customized signal processing algorithm to obtain scattered intensity profiling assessments that could reveal the effects of nail beautification on the nail plate. The formation and progression of cracks on the nail plate surface were detected as an effect of nail beautification after 72 h of nail-art removal. Changes in backscattered light intensity and nail plate thickness of control and art-removed nails were quantitatively compared. The results revealed the potential feasibility of the developed OCT-based inspection procedure to diagnose post-progressive nail-art effects on in vivo nail plate, which can be helpful to prevent nail plate damages during art removal through real-time monitoring of the boundary between the nail plate and nail-art. Besides nail-art effects, the developed method can also be used for the investigation of nail plate abnormalities by examining the inconsistency of internal and external nail plate structure, which can be diagnosed with both qualitative and quantitative assessments from a clinical perspective.
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Affiliation(s)
- Sm Abu Saleah
- grid.258803.40000 0001 0661 1556School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566 South Korea
| | - Pilun Kim
- grid.464630.30000 0001 0696 9566Production Engineering Research Institute, LG Electronics, 17790, 222 LG-ro Jinwi-myeon, Pyeongtaek-si, Gyeonggi-do South Korea
| | - Daewoon Seong
- grid.258803.40000 0001 0661 1556School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566 South Korea
| | - Ruchire Eranga Wijesinghe
- grid.267198.30000 0001 1091 4496Department of Materials and Mechanical Technology, Faculty of Technology, University of Sri Jayewardenepura, Pitipana, Homagama, 10200 Sri Lanka
| | - Mansik Jeon
- grid.258803.40000 0001 0661 1556School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566 South Korea
| | - Jeehyun Kim
- grid.258803.40000 0001 0661 1556School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566 South Korea
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16
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Chen GL, Jeon M, Ross M, Liu H, Lee C, Hahn T, McCarthy PL, Kim C. Optical Coherence Tomography for Quantifying Human Cutaneous Chronic Graft-versus-Host Disease. Transplant Cell Ther 2020; 27:271.e1-271.e8. [PMID: 33781538 DOI: 10.1016/j.jtct.2020.11.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/02/2020] [Accepted: 11/23/2020] [Indexed: 11/17/2022]
Abstract
Chronic graft-versus-host disease (cGVHD) is the most common cause of nonrelapse mortality after allogeneic hematopoietic cell transplantation (alloHCT). Cutaneous cGVHD is characterized by thickening of the skin and connective tissues, causing discomfort and limited mobility. Current assessment of these skin lesions is based on physical examination of their thickening, pinchability, and movability. Optical coherence tomography (OCT) is a noninvasive, high-resolution technique using near-infrared light to interrogate tissues and image the microstructure without the use of contrast agents. We determined the applicability of OCT to human cutaneous cGVHD. Seven patients with varying degrees of cutaneous cGVHD, including 3 controls who underwent autologous HCT were prospectively examined using the cGVHD Skin (Vienna) Scale and imaged with OCT. Analysis of OCT images and clinical exams revealed that stratum corneum thickness, epidermal thickness, and depth of light transmission were correlated with cutaneous cGVHD severity in the hands, forearms, upper arms, legs, thighs, and upper back (P ≤ .03). Longitudinal OCT changes during cGVHD treatment paralleled clinical changes in the arm and upper back. OCT changes were observed in the absence of clinical changes. OCT imaging reflects the severity of cutaneous cGVHD and can be used to follow these lesions. OCT may facilitate the design of therapeutic trials in cGVHD by providing a quantitative measurement of cGVHD severity. Additional studies are needed.
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Affiliation(s)
- George L Chen
- Department of Medicine, Transplant and Cellular Therapy Program, Roswell Park Cancer Institute, Buffalo, New York.
| | - Mansik Jeon
- Department of Creative IT Engineering and Electrical Engineering, Pohang University of Science and Technology, Pohang, Republic of Korea; School of Electrical Engineering and Computer Science, Kyungpook National University, Daegu, Republic of Korea
| | - Maureen Ross
- Department of Medicine, Transplant and Cellular Therapy Program, Roswell Park Cancer Institute, Buffalo, New York
| | - Hong Liu
- Department of Medicine, Transplant and Cellular Therapy Program, Roswell Park Cancer Institute, Buffalo, New York
| | - Changho Lee
- Department of Nuclear Medicine, Chonnam National University Medical School and Hwasun Hospital, Hwasun, Republic of Korea
| | - Theresa Hahn
- Department of Medicine, Transplant and Cellular Therapy Program, Roswell Park Cancer Institute, Buffalo, New York
| | - Philip L McCarthy
- Department of Medicine, Transplant and Cellular Therapy Program, Roswell Park Cancer Institute, Buffalo, New York
| | - Chulhong Kim
- Department of Creative IT Engineering and Electrical Engineering, Pohang University of Science and Technology, Pohang, Republic of Korea.
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17
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Lee J, Lee SY, Han S, Seong D, Wijesinghe RE, Kim P, Jeon M, Jung HY, Kim J. Multi-directional Morphological Assessment of Single Bacterial Colonies Through Non-invasive Optical Imaging. Ann Biomed Eng 2020; 48:3014-3023. [PMID: 33118064 DOI: 10.1007/s10439-020-02660-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/12/2020] [Indexed: 11/28/2022]
Abstract
A bacterium in bacterial colony is a basal component of bacterial studies and is therefore of considerable importance. The morphological characteristics of a single colony have been widely used as the standard to identify diverse bacterial species. However, the conventional methods for obtaining morphological information, such as microscopic techniques, cannot provide tomographic views. This study utilizes spectral-domain optical coherence tomography (SD-OCT) to observe both external and internal structures for single colonies. OCT imaging provided a clear top (projection) and lateral (cross-sectional) images, which can identify distinct features in the fifteen different bacterial species examined. Through the acquired OCT images, the elevation type in each genus was confirmed, and the quantitative measurements for morphology including a diameter, height, and elevation angle were achieved. Moreover, the OCT raw data was used to build three-dimensional images to observe outer appearances in all direction. As a result, the averaged angles of 7.92°, 14.40°, 6.78°, and 11.92° of the genus Hymenobacter, Spirosoma, Bacillus, and Deinococcus, respectively, were calculated. In conclusion, we have demonstrated that OCT is a highly feasible, non-invasive method for the identification of bacterial species, providing detailed morphological and visual information. It thus has strong potential for applications in bacteriology, as well as biomedical and food sciences.
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Affiliation(s)
- Junsoo Lee
- School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Taegu, 41566, South Korea
| | - Seung-Yeol Lee
- School of Applied Biosciences, Kyungpook National University, 80 Daehak-ro, Buk-gu, Taegu, 41566, South Korea
| | - Sangyeob Han
- School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Taegu, 41566, South Korea
| | - Daewoon Seong
- School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Taegu, 41566, South Korea
| | - Ruchire Eranga Wijesinghe
- Department of Biomedical Engineering, Kyungil University, 50 Gamasil-gil, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do, 38428, South Korea
| | - Pilun Kim
- School of Medicine, Kyungpook National University, 80 Daehak-ro, Buk-gu, Taegu, 41566, South Korea
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Taegu, 41566, South Korea
| | - Hee-Young Jung
- School of Applied Biosciences, Kyungpook National University, 80 Daehak-ro, Buk-gu, Taegu, 41566, South Korea.
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Taegu, 41566, South Korea.
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18
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Hong H, Kim J, Cho H, Park SM, Jeon M, Kim HK, Kim DS. Ultra-stiff compressed collagen for corneal perforation patch graft realized by in situ photochemical crosslinking. Biofabrication 2020; 12:045030. [PMID: 33000763 DOI: 10.1088/1758-5090/abb52a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Despite the potential of a collagen construct, consisting of a major extracellular matrix component of the native cornea, as a patch graft to treat the corneal perforation, there has still been difficulty in acquiring sufficient mechanical properties for clinical availability. This study developed a novel in situ photochemical crosslinking (IPC)-assisted collagen compression process, namely, the IPC-C2 process, to significantly enhance the mechanical properties of the collagen construct for the development of a collagenous patch graft. For the first time, we found that compressed collagen construct was rapidly rehydrated in an aqueous solution, which inhibited effective riboflavin-mediated photochemical crosslinking for mechanical improvement. The IPC-C2 process was designed to concurrently induce the physical compaction and photochemical crosslinking of a compressed collagen construct, thereby avoiding the loosening of collagen fibrillar structure during rehydration and ultimately improving crosslinking efficiency. Hence, the suggested IPC-C2 process could fabricate a collagen construct with a high collagen density (∼120-280 mg ml-1) and ∼103-fold increased mechanical properties (an elastic modulus of up to ∼29 MPa and ultimate tensile strength of ∼8 MPa) compared with collagen gel. This construct can then be used as a clinically applicable collagenous patch graft. With sufficient mechanical strength for surgical suture and the controllable thickness for patient specificity, the potential of the fabricated IPC-compressed collagen construct for clinical applications was demonstrated by using an in vivo rabbit corneal perforation model. It effectively protected aqueous humor leakage and maintained the integrity of the eye globe without an additional complication.
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Affiliation(s)
- Hyeonjun Hong
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
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19
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Nam Y, Nam K, Myung NH, Jeon M, Kim J. Gastrointestinal: Lymphoblastic lymphoma presenting as huge abdominal masses. J Gastroenterol Hepatol 2020; 35:917. [PMID: 31694062 DOI: 10.1111/jgh.14906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 10/14/2019] [Indexed: 12/09/2022]
Affiliation(s)
- Y Nam
- Department of Internal Medicine, Dankook University Hospital, Cheonan, South Korea
| | - K Nam
- Department of Internal Medicine, Dankook University Hospital, Cheonan, South Korea
| | - N-H Myung
- Department of Pathology, Dankook University Hospital, Dankook University College of Medicine, Cheonan, South Korea
| | - M Jeon
- Department of Internal Medicine, Dankook University Hospital, Cheonan, South Korea
| | - J Kim
- Department of Internal Medicine, Dankook University Hospital, Cheonan, South Korea
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20
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Han S, Wijesinghe RE, Jeon D, Han Y, Lee J, Lee J, Jo H, Lee DE, Jeon M, Kim J. Optical Interferometric Fringe Pattern-Incorporated Spectrum Calibration Technique for Enhanced Sensitivity of Spectral Domain Optical Coherence Tomography. Sensors (Basel) 2020; 20:s20072067. [PMID: 32272646 PMCID: PMC7181120 DOI: 10.3390/s20072067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/30/2020] [Accepted: 04/02/2020] [Indexed: 12/01/2022]
Abstract
Depth-visualizing sensitivity can be degraded due to imperfect optical alignment and non-equidistant distribution of optical signals in the pixel array, which requires a measurement of the re-sampling process. To enhance this depth-visualizing sensitivity, reference and sample arm-channeled spectra corresponding to different depths using mirrors were obtained to calibrate the spectrum sampling prior to Fourier transformation. During the process, eight interferogram patterns corresponding to point spread function (PSF) signals at eight optical path length differences were acquired. To calibrate the spectrum, generated intensity points of the original interferogram were re-indexed towards a maximum intensity range, and these interferogram re-indexing points were employed to generate a new lookup table. The entire software-based process consists of eight consecutive steps. Experimental results revealed that the proposed method can achieve images with a high depth-visualizing sensitivity. Furthermore, the results validate the proposed method as a rapidly performable spectral calibration technique, and the real-time images acquired using our technique confirm the simplicity and applicability of the method to existing optical coherence tomography (OCT) systems. The sensitivity roll-off prior to the spectral calibration was measured as 28 dB and it was halved after the calibration process.
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Affiliation(s)
- Sangyeob Han
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.H.); (D.J.); (J.L.); (J.L.); (H.J.); (J.K.)
| | - Ruchire Eranga Wijesinghe
- Department of Biomedical Engineering, College of Engineering, Kyungil University, 50, Gamasil-gil, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do 38428, Korea;
- Department of Autonomous Robot Engineering, College of Smart Engineering, Kyungil University, 50, Gamasil-gil, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do 38428, Korea
| | - Deokmin Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.H.); (D.J.); (J.L.); (J.L.); (H.J.); (J.K.)
| | - Youngmin Han
- Department of Nuclear Energy Convergence, Kyungil University, 50, Gamasil-gil, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do 38428, Korea;
| | - Jaeyul Lee
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.H.); (D.J.); (J.L.); (J.L.); (H.J.); (J.K.)
| | - Junsoo Lee
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.H.); (D.J.); (J.L.); (J.L.); (H.J.); (J.K.)
| | - Hosung Jo
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.H.); (D.J.); (J.L.); (J.L.); (H.J.); (J.K.)
| | - Dong-Eun Lee
- School of Architecture and Civil Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea
- Correspondence: (D.-E.L.); (M.J.)
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.H.); (D.J.); (J.L.); (J.L.); (H.J.); (J.K.)
- Correspondence: (D.-E.L.); (M.J.)
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea; (S.H.); (D.J.); (J.L.); (J.L.); (H.J.); (J.K.)
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21
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Lee J, Han S, Seong D, Lee J, Park S, Eranga Wijesinghe R, Jeon M, Kim J. Fully waterproof two-axis galvanometer scanner for enhanced wide-field optical-resolution photoacoustic microscopy. Opt Lett 2020; 45:865-868. [PMID: 32058491 DOI: 10.1364/ol.380032] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 01/04/2020] [Indexed: 06/10/2023]
Abstract
A large field-of-view and fast scanning of photoacoustic microscopy (PAM) relatively have been difficult to obtain due to the water-drowned structure of the system for the transmission of ultrasonic signals. Researchers have widely studied the achievement of a waterproof scanner for dynamic biological applications with a high-resolution and high signal-to-noise ratio. This Letter reports a novel, to the best of our knowledge, waterproof galvanometer scanner-based PAM system with a successfully attainable ${9.0}\;{\rm mm} \times {14.5}\;{\rm mm}$9.0mm×14.5mm scan region, amplitude scan rate of 40 kHz, and spatial resolution of 4.9 µm. The in vivo characterization of a mouse brain in intact-skull microvascular visualization demonstrated its capability in biomedical imaging and is anticipated to be an effective technique for various preclinical and clinical studies.
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22
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Jeon B, Lee J, Jeon D, Kim P, Jang JH, Wijesinghe RE, Jeon M, Kim J. Functional assessment of moisture influenced cadaveric tympanic membrane using phase shift-resolved optical Doppler vibrography. J Biophotonics 2020; 13:e201900202. [PMID: 31670908 DOI: 10.1002/jbio.201900202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 10/16/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
An elevated relative moisture in the external ear canal and middle ear cavity may predispose to chronic otorrhea and related infections along with abnormal tympanic membrane (TM) vibration patterns. Therefore, phase shift-resolved optical Doppler vibrography (ODV) was used for vibration assessments of moisture influenced cadaveric TM. ODV was applied to generate time resolved cross-sectional and volumetric vibrographs of a cadaveric TM, driven acoustically at several frequencies. In order to analyze the effect of moisture on TM, homogenous moisture conditions were provided by soaking the cadaveric TM specimens in 1× phosphate buffer saline with a pH of 7.4. The TM specimen was exposed to a rapidly switchable frequency generator during the ODV image acquisition. The experiment was conducted for 3 hours and the cadaveric TM was exposed to each frequency with an interval of 30 minutes. Acquired phase shift-resolved ODV assessments revealed a depth dependent vibration tendency between the applied frequencies, along with a decline in the moisture level of the cadaveric TM specimen. Thus, the ODV method can aid our understanding of sound conduction in the middle ear, thus supporting the diagnosis of TM diseases.
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Affiliation(s)
- Byeonggyu Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Jaeyul Lee
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Deokmin Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Pilun Kim
- Institute of Biomedical Engineering, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jeong Hun Jang
- Department of Otolaryngology, School of Medicine, Ajou University, Gyeongsan, Republic of Korea
| | - Ruchire Eranga Wijesinghe
- Department of Biomedical Engineering, College of Engineering, Kyungil University, Gyeongsan, Republic of Korea
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Republic of Korea
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23
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Seong D, Kwon J, Jeon D, Wijesinghe RE, Lee J, Ravichandran NK, Han S, Lee J, Kim P, Jeon M, Kim J. In Situ Characterization of Micro-Vibration in Natural Latex Membrane Resembling Tympanic Membrane Functionally Using Optical Doppler Tomography. Sensors (Basel) 2019; 20:E64. [PMID: 31877652 PMCID: PMC6982896 DOI: 10.3390/s20010064] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/13/2019] [Accepted: 12/18/2019] [Indexed: 12/29/2022]
Abstract
Non-invasive characterization of micro-vibrations in the tympanic membrane (TM) excited by external sound waves is considered as a promising and essential diagnosis in modern otolaryngology. To verify the possibility of measuring and discriminating the vibrating pattern of TM, here we describe a micro-vibration measurement method of latex membrane resembling the TM. The measurements are obtained with an externally generated audio stimuli of 2.0, 2.2, 2.8, 3.1 and 3.2 kHz, and their respective vibrations based tomographic, volumetric and quantitative evaluations were acquired using optical Doppler tomography (ODT). The micro oscillations and structural changes which occurred due to diverse frequencies are measured with sufficient accuracy using a highly sensitive ODT system implied phase subtraction method. The obtained results demonstrated the capability of measuring and analyzing the complex varying micro-vibration of the membrane according to implied sound frequency.
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Affiliation(s)
- Daewoon Seong
- School of Electronics Engineering, College of IT engineering, Kyungpook National University, Daegu 41566, Korea; (D.S.); (J.K.); (D.J.); (J.L.); (N.K.R.); (S.H.); (J.L.)
| | - Jaehwan Kwon
- School of Electronics Engineering, College of IT engineering, Kyungpook National University, Daegu 41566, Korea; (D.S.); (J.K.); (D.J.); (J.L.); (N.K.R.); (S.H.); (J.L.)
| | - Deokmin Jeon
- School of Electronics Engineering, College of IT engineering, Kyungpook National University, Daegu 41566, Korea; (D.S.); (J.K.); (D.J.); (J.L.); (N.K.R.); (S.H.); (J.L.)
| | - Ruchire Eranga Wijesinghe
- Department of Biomedical Engineering, College of Engineering, Kyungil University, Gyeongsan 38428, Korea;
| | - Jaeyul Lee
- School of Electronics Engineering, College of IT engineering, Kyungpook National University, Daegu 41566, Korea; (D.S.); (J.K.); (D.J.); (J.L.); (N.K.R.); (S.H.); (J.L.)
| | - Naresh Kumar Ravichandran
- School of Electronics Engineering, College of IT engineering, Kyungpook National University, Daegu 41566, Korea; (D.S.); (J.K.); (D.J.); (J.L.); (N.K.R.); (S.H.); (J.L.)
| | - Sangyeob Han
- School of Electronics Engineering, College of IT engineering, Kyungpook National University, Daegu 41566, Korea; (D.S.); (J.K.); (D.J.); (J.L.); (N.K.R.); (S.H.); (J.L.)
| | - Junsoo Lee
- School of Electronics Engineering, College of IT engineering, Kyungpook National University, Daegu 41566, Korea; (D.S.); (J.K.); (D.J.); (J.L.); (N.K.R.); (S.H.); (J.L.)
| | - Pilun Kim
- School of Medicine, Institute of Biomedical Engineering, Kyungpook National University, Daegu 41944, Korea;
| | - Mansik Jeon
- School of Electronics Engineering, College of IT engineering, Kyungpook National University, Daegu 41566, Korea; (D.S.); (J.K.); (D.J.); (J.L.); (N.K.R.); (S.H.); (J.L.)
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT engineering, Kyungpook National University, Daegu 41566, Korea; (D.S.); (J.K.); (D.J.); (J.L.); (N.K.R.); (S.H.); (J.L.)
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24
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Jeon M, Hayton J, Dimitriou D. Sleep health literacy in the UK and South Korea: parent's identification and health-seeking attitudes for children's sleep problems. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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Park J, Lee K, Kim H, Park S, Wijesinghe RE, Lee J, Han S, Lee S, Kim P, Cho D, Jang J, Kim HK, Jeon M, Kim J. Biocompatibility evaluation of bioprinted decellularized collagen sheet implanted in vivo cornea using swept-source optical coherence tomography. J Biophotonics 2019; 12:e201900098. [PMID: 31240872 PMCID: PMC7065634 DOI: 10.1002/jbio.201900098] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 05/26/2019] [Accepted: 06/25/2019] [Indexed: 05/04/2023]
Abstract
Corneal transplantation by full-thickness penetrating keratoplasty with human donor tissue is a widely accepted treatment for damaged or diseased corneas. Although corneal transplantation has a high success rate, a shortage of high-quality donor tissue is a considerable limitation. Therefore, bioengineered corneas could be an effective solution for this limitation, and a decellularized extracellular matrix comprises a promising scaffold for their fabrication. In this study, three-dimensional bioprinted decellularized collagen sheets were implanted into the stromal layer of the cornea of five rabbits. We performed in vivo noninvasive monitoring of the rabbit corneas using swept-source optical coherence tomography (OCT) after implanting the collagen sheets. Anterior segment OCT images and averaged amplitude-scans were acquired biweekly to monitor corneal thickness after implantation for 1 month. The averaged cornea thickness in the control images was 430.3 ± 5.9 μm, while the averaged thickness after corneal implantation was 598.5 ± 11.8 μm and 564.5 ± 12.5 μm at 2 and 4 weeks, respectively. The corneal thickness reduction of 34 μm confirmed the biocompatibility through the image analysis of the depth-intensity profile base. Moreover, hematoxylin and eosin staining supported the biocompatibility evaluation of the bioprinted decellularized collagen sheet implantation. Hence, the developed bioprinted decellularized collagen sheets could become an alternative solution to human corneal donor tissue, and the proposed image analysis procedure could be beneficial to confirm the success of the surgery.
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Affiliation(s)
- Jaeseok Park
- School of Electronic Engineering, College of IT EngineeringKyungpook National UniversityDaeguSouth Korea
| | - Kyoung‐Pil Lee
- Department of Ophthalmology, School of MedicineKyungpook National UniversityDaeguSouth Korea
- Bio‐Medical InstituteKyungpook National University HospitalDaeguSouth Korea
| | - Hyeonji Kim
- Department of Mechanical EngineeringPohang University of Science and TechnologyPohangSouth Korea
| | - Sungjo Park
- Laser Application Center, Institute of Advanced Convergence TechnologyKyungpook National UniversityDaeguSouth Korea
| | - Ruchire E. Wijesinghe
- Department of Biomedical Engineering, College of EngineeringKyungil UniversityGyeongsanSouth Korea
| | - Jaeyul Lee
- School of Electronic Engineering, College of IT EngineeringKyungpook National UniversityDaeguSouth Korea
| | - Sangyeob Han
- School of Electronic Engineering, College of IT EngineeringKyungpook National UniversityDaeguSouth Korea
| | - Sangbong Lee
- School of Electronic Engineering, College of IT EngineeringKyungpook National UniversityDaeguSouth Korea
| | - Pilun Kim
- Institute of Biomedical Engineering, School of MedicineKyungpook National UniversityDaeguSouth Korea
| | - Dong‐Woo Cho
- Department of Mechanical EngineeringPohang University of Science and TechnologyPohangSouth Korea
| | - Jinah Jang
- Department of Creative IT EngineeringPohang University of Science and TechnologyPohangSouth Korea
- School of Interdisciplinary Bioscience and BioengineeringPohang University of Science and TechnologyPohangSouth Korea
| | - Hong K. Kim
- Department of Ophthalmology, School of MedicineKyungpook National UniversityDaeguSouth Korea
- Bio‐Medical InstituteKyungpook National University HospitalDaeguSouth Korea
| | - Mansik Jeon
- School of Electronic Engineering, College of IT EngineeringKyungpook National UniversityDaeguSouth Korea
| | - Jeehyun Kim
- School of Electronic Engineering, College of IT EngineeringKyungpook National UniversityDaeguSouth Korea
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26
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Jung H, Park S, Gunassekaran GR, Jeon M, Cho YE, Baek MC, Park JY, Shim G, Oh YK, Kim IS, Kim C, Lee B. A Peptide Probe Enables Photoacoustic-Guided Imaging and Drug Delivery to Lung Tumors in K-rasLA2 Mutant Mice. Cancer Res 2019; 79:4271-4282. [PMID: 31243044 DOI: 10.1158/0008-5472.can-18-3089] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 05/12/2019] [Accepted: 06/18/2019] [Indexed: 11/16/2022]
Abstract
The lack of molecular targets and targeting probes remains a major drawback for targeted imaging and drug delivery in lung cancer. In this study, we exploited in vivo phage display to identify a novel targeting probe that homes to the tumor in a K-rasLA2 mutant mouse lung cancer model. Compared with other candidate peptides selected from 5 rounds of phage display, the CRQTKN peptide homed to tumor nodules in the lung of mutant mice at higher levels. Photoacoustic tomography of mutant mice detected lung tumors via tumor homing of the near-infrared fluorescence dye-labeled CRQTKN peptide. Ex vivo photoacoustic images of isolated organs further demonstrated tumor homing of the CRQTKN peptide, whereas minimal accumulation was observed in control organs, such as the liver. Compared with untargeted liposomes and doxorubicin, doxorubicin-loaded liposomes whose surface was modified with the CRQTKN peptide more efficiently delivered doxorubicin and reduced the number or size of tumor lesions in K-rasLA2 mutant mice. Analysis of hematologic parameters and liver and kidney function showed no significant systemic side effects by the treatments. Affinity-based identification was used to detect TNF receptor superfamily member 19L (TNFRSF19L), which was upregulated in lung tumors of mutant mice, as the receptor for the CRQTKN peptide. In conclusion, these results suggest that the CRQTKN peptide is a promising targeting probe for photoacoustic-guided detection and drug delivery to lung cancer, and acts by binding to TNFRSF19L. SIGNIFICANCE: These findings present a new tumor-targeting probe for photoacoustic-guided detection and drug delivery.
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Affiliation(s)
- Hyunkyung Jung
- Department of Biochemistry and Cell Biology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,CMRI, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Sungjo Park
- Department of Creative IT Engineering, Pohang University of Science and Technology, Gyeongbuk, Republic of Korea.,Department of Electrical Engineering, Pohang University of Science and Technology, Gyeongbuk, Republic of Korea
| | - Gowri Rangaswamy Gunassekaran
- Department of Biochemistry and Cell Biology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,CMRI, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Young-Eun Cho
- Department of Molecular Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Moon-Chang Baek
- BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,CMRI, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,Department of Molecular Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jae Yong Park
- BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,CMRI, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Gayong Shim
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Yu-Kyoung Oh
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - In-San Kim
- Biomedical Center, Korea Institute of Science and Technology, Seoul, Republic of Korea.,KU-KIST School, Korea University, Seoul, Republic of Korea
| | - Chulhong Kim
- Department of Creative IT Engineering, Pohang University of Science and Technology, Gyeongbuk, Republic of Korea. .,Department of Electrical Engineering, Pohang University of Science and Technology, Gyeongbuk, Republic of Korea
| | - Byungheon Lee
- Department of Biochemistry and Cell Biology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea. .,BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,CMRI, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
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27
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Lee J, Wijesinghe RE, Jeon D, Kim P, Choung YH, Jang JH, Jeon M, Kim J. Clinical Utility of Intraoperative Tympanomastoidectomy Assessment Using a Surgical Microscope Integrated with an Optical Coherence Tomography. Sci Rep 2018; 8:17432. [PMID: 30479360 PMCID: PMC6258704 DOI: 10.1038/s41598-018-35563-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 10/29/2018] [Indexed: 12/15/2022] Open
Abstract
Significant technical and optical advances are required for intraoperative optical coherence tomography (OCT) to be utilized during otological surgeries. Integrating OCT with surgical microscopy makes it possible to evaluate soft tissue in real-time and at a high resolution. Herein, we describe an augmented-reality, intraoperative OCT/microscope system with an extended working distance of 280 mm, providing more space for surgical manipulation than conventional techniques. We initially performed ex vivo experiments to evaluate system performance. In addition, we validated the system by performing preliminary clinical assessments of tympanomastoidectomy outcomes in six patients with chronic otitis media. The system evaluated residual inflammation in the region-of-interest of the mastoid bone. Most importantly, the system intraoperatively revealed the connection between the graft and the remnant tympanic membrane. The extended working distance allows otological surgeons to evaluate the status of both the mastoid bone and tympanic membrane during manipulation, affording full intraoperative imaging.
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Affiliation(s)
- Jaeyul Lee
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Ruchire Eranga Wijesinghe
- Department of Biomedical Engineering, College of Engineering, Kyungil University, 50, Gamasil-gil, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do, 38428, Republic of Korea
| | - Deokmin Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Pilun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Yun-Hoon Choung
- Department of Otolaryngology, School of Medicine, Ajou University, 164 World cup-ro, Yeongtong-gu, Suwon, Gyeunggi-do, 16499, Republic of Korea
| | - Jeong Hun Jang
- Department of Otolaryngology, School of Medicine, Ajou University, 164 World cup-ro, Yeongtong-gu, Suwon, Gyeunggi-do, 16499, Republic of Korea.
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.
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Lakshmikantha HT, Ravichandran NK, Jeon M, Kim J, Park HS. Assessment of cortical bone microdamage following insertion of microimplants using optical coherence tomography: a preliminary study. J Zhejiang Univ Sci B 2018; 19:818-828. [PMID: 30387332 DOI: 10.1631/jzus.b1700612] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVES The study was done to evaluate the efficacy of optical coherence tomography (OCT), to detect and analyze the microdamage occurring around the microimplant immediately following its placement, and to compare the findings with micro-computed tomography (μCT) images of the samples to validate the result of the present study. METHODS Microimplants were inserted into bovine bone samples. Images of the samples were obtained using OCT and μCT. Visual comparisons of the images were made to evaluate whether anatomical details and microdamage induced by microimplant insertion were accurately revealed by OCT. RESULTS The surface of the cortical bone with its anatomical variations is visualized on the OCT images. Microdamage occurring on the surface of the cortical bone around the microimplant can be appreciated in OCT images. The resulting OCT images were compared with the μCT images. A high correlation regarding the visualization of individual microcracks was observed. The depth penetration of OCT is limited when compared to μCT. CONCLUSIONS OCT in the present study was able to generate high-resolution images of the microdamage occurring around the microimplant. Image quality at the surface of the cortical bone is above par when compared with μCT imaging, because of the inherent high contrast and high-resolution quality of OCT systems. Improvements in the imaging depth and development of intraoral sensors are vital for developing a real-time imaging system and integrating the system into orthodontic practice.
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Affiliation(s)
| | - Naresh Kumar Ravichandran
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea
| | - Hyo-Sang Park
- Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu 41940, Korea
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29
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Wijesinghe RE, Lee SY, Ravichandran NK, Shirazi MF, Kim P, Jung HY, Jeon M, Kim J. Biophotonic approach for the characterization of initial bitter-rot progression on apple specimens using optical coherence tomography assessments. Sci Rep 2018; 8:15816. [PMID: 30361556 PMCID: PMC6202396 DOI: 10.1038/s41598-018-33791-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/04/2018] [Indexed: 12/23/2022] Open
Abstract
The tremendous advances achieved in the biophotonics technologies have intensified the necessity for non-invasive modalities that can characterize diverse biological materials with increased sensitivity and resolution. Optical coherence tomography (OCT) is one of the techniques that has been applied for biological applications in medicine and agriculture to identify structural properties. Herein, we report the successful incorporation of OCT for the identification of morphological changes that occur as a result of the bitter rot disease, through continuous detection of structural changes. Detailed inner morphological structural changes occurring in fruit specimens were precisely analyzed as a function of the disease incubation period using OCT. The conducted histological correlation and quantitative three-dimensional evaluations provide a robust platform for further discoveries related to plant materials. The results highlight the initial identification of bitter rot progression on apple specimens owing to the non-invasive inspection capability of OCT. Therefore, we expect that the proposed method will enable immediate sensitivity improvements in the inspection of plant diseases for postharvest utility.
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Affiliation(s)
- Ruchire Eranga Wijesinghe
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea
- Department of Biomedical Engineering, College of Engineering, Kyungil University, 50, Gamasil-gil, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do, 38428, Republic of Korea
| | - Seung-Yeol Lee
- School of Applied Biosciences, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea
| | - Naresh Kumar Ravichandran
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea
| | - Muhammad Faizan Shirazi
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Waehringer Guertel 18-20, A-1090, Vienna, Austria
| | - Pilun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea
- Institute of Biomedical Engineering, School of Medicine, Kyungpook National University, 680, Gukchaebosang-ro, Jung-gu, Daegu, 41944, Korea
| | - Hee-Young Jung
- School of Applied Biosciences, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea.
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea
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30
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Manattayil JK, Ravichandran NK, Wijesinghe RE, Shirazi MF, Lee SY, Kim P, Jung HY, Jeon M, Kim J. Non-Destructive Classification of Diversely Stained Capsicum annuum Seed Specimens of Different Cultivars Using Near-Infrared Imaging Based Optical Intensity Detection. Sensors (Basel) 2018; 18:E2500. [PMID: 30071634 PMCID: PMC6111981 DOI: 10.3390/s18082500] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/21/2018] [Accepted: 07/27/2018] [Indexed: 12/30/2022]
Abstract
The non-destructive classification of plant materials using optical inspection techniques has been gaining much recent attention in the field of agriculture research. Among them, a near-infrared (NIR) imaging method called optical coherence tomography (OCT) has become a well-known agricultural inspection tool since the last decade. Here we investigated the non-destructive identification capability of OCT to classify diversely stained (with various staining agents) Capsicum annuum seed specimens of different cultivars. A swept source (SS-OCT) system with a spectral band of 1310 nm was used to image unstained control C. annuum seeds along with diversely stained Capsicum seeds, belonging to different cultivar varieties, such as C. annuum cv. PR Ppareum, C. annuum cv. PR Yeol, and C. annuum cv. Asia Jeombo. The obtained cross-sectional images were further analyzed for the changes in the intensity of back-scattered light (resulting due to dye pigment material and internal morphological variations) using a depth scan profiling technique to identify the difference among each seed category. The graphically acquired depth scan profiling results revealed that the control specimens exhibit less back-scattered light intensity in depth scan profiles when compared to the stained seed specimens. Furthermore, a significant back-scattered light intensity difference among each different cultivar group can be identified as well. Thus, the potential capability of OCT based depth scan profiling technique for non-destructive classification of diversely stained C. annum seed specimens of different cultivars can be sufficiently confirmed through the proposed scheme. Hence, when compared to conventional seed sorting techniques, OCT can offer multipurpose advantages by performing sorting of seeds in respective to the dye staining and provides internal structural images non-destructively.
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Affiliation(s)
- Jyothsna Konkada Manattayil
- Department of Electronics and Communication, Faculty of Engineering, Christ (Deemed to be University), Bangalore 560029, India.
| | - Naresh Kumar Ravichandran
- Kyungpook National University, College of IT Engineering, School of Electronics Engineering, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Ruchire Eranga Wijesinghe
- Department of Biomedical Engineering, College of Engineering, Kyungil University, 50, Gamasil-gil, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do 38428, Korea.
| | - Muhammad Faizan Shirazi
- Center of Medical Physics and Biomedical Engineering, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Seung-Yeol Lee
- School of Applied Biosciences, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Pilun Kim
- Institute of Biomedical Engineering, Kyungpook National University, 680, Gukchaebosang-ro, Jung-gu, Daegu 41944, Korea.
| | - Hee-Young Jung
- School of Applied Biosciences, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Mansik Jeon
- Kyungpook National University, College of IT Engineering, School of Electronics Engineering, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Jeehyun Kim
- Kyungpook National University, College of IT Engineering, School of Electronics Engineering, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea.
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Jeon D, Cho NH, Park K, Kim K, Jeon M, Jang JH, Kim J. In Vivo Vibration Measurement of Middle Ear Structure Using Doppler Optical Coherence Tomography: Preliminary Study. Clin Exp Otorhinolaryngol 2018; 12:40-49. [PMID: 30045616 PMCID: PMC6315208 DOI: 10.21053/ceo.2018.00185] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/31/2018] [Indexed: 12/27/2022] Open
Abstract
Objectives Doppler optical coherence tomography (DOCT) is useful for both, the spatially resolved measurement of the tympanic membrane (TM) oscillation and high-resolution imaging. We demonstrated a new technique capable of providing real-time two-dimensional Doppler OCT image of rapidly oscillatory latex mini-drum and in vivo rat TM and ossicles. Methods Using DOCT system, the oscillation of sample was measured at frequency range of 1–4 kHz at an output of 15 W. After the sensitivity of the DOCT system was verified using a latex mini-drum consisting of a 100 μm-thick latex membrane, changes in displacement of the umbo and contacted area between TM and malleus in normal and pathologic conditions. Results The oscillation cycles of the mini-drum for stimulus frequencies were 1.006 kHz for 1 kHz, 2.012 kHz for 2kHz, and 3.912 kHz for 4 kHz, which means that the oscillation cycle of the mini-drum become short in proportional to the frequency of stimuli. The oscillation cycles of umbo area and the junction area in normal TM for frequencies of the stimuli showed similar integer ratio with the data of latex mini-drum for stimuli less than 4 kHz. In the case of middle ear effusion condition, the Doppler signal showed a tendency of attenuation in all frequencies, which was prominent at 1 kHz and 2 kHz. Conclusion The TM vibration under sound stimulation with frequencies from 1 kHz to 4 kHz in normal and pathologic conditions was demonstrated using signal demodulation method in in vivo condition. The OCT technology could be helpful for functional and structural assessment as an optional modality.
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Affiliation(s)
- Doekmin Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Korea
| | - Nam Hyun Cho
- Department of Otology and Laryngology, Harvard Medical School, Boston, MA, USA.,Eaton-Peabody Laboratories, Massachusetts Eye and Ear Infirmary (MEEI), Boston, MA, USA
| | - Kibeom Park
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Korea
| | - Kanghae Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Korea
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Korea
| | - Jeong Hun Jang
- Department of Otolaryngology, Ajou University School of Medicine, Suwon, Korea
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Korea
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Park K, Cho NH, Jeon M, Lee SH, Jang JH, Boppart SA, Jung W, Kim J. Optical assessment of the in vivo tympanic membrane status using a handheld optical coherence tomography-based otoscope. Acta Otolaryngol 2018; 138:367-374. [PMID: 29125012 DOI: 10.1080/00016489.2017.1395515] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Conventional otoscopes and oto-endoscopes, which are used to examine the tympanic membrane (TM), do not provide tomographic information. Optical coherence tomography (OCT) non-invasively reveals the depth-resolved internal microstructure of the TM with very high spatial resolution. We designed this study to examine the TMs with middle ear diseases using a handheld otoscope employing 860 nm spectral domain (SD)-OCT, combined with video camera and to demonstrate the clinical applicability of this system. DESIGN A total of 120 patients with otologic symptoms were enrolled. TM images were obtained using the handheld OCT-based otoscope (860 nm central wave length, 15 μm axial resolution, 15 μm lateral resolution, and 7 mm scanning range using relay lens). Both OCT and oto-endoscope images were compared according to the clinical characteristics such as perforation, retraction, and postoperative healing process. RESULTS The objective grade about the thickness of perforation margins and the accurate information about the extent of TM retraction that was not distinguishable by oto-endoscopic exam could be identified using this system. The postoperative healing process of TMs could be also followed using the OCT device. CONCLUSION These analyses from the surgeon-oriented perspective suggest another useful application of the handheld OCT device.
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Affiliation(s)
- Kibeom Park
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Korea
| | - Nam Hyun Cho
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear Infirmary (MEEI), Boston, MA, USA
- Department of Otology and Laryngology, Harvard Medical School, Boston, MA, USA
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Korea
| | - Sang Heun Lee
- Department of Otorhinolaryngology, Daegu Veterans Hospital, Daegu, Korea
| | - Jeong Hun Jang
- Department of Otorhinolaryngology, College of Medicine, Ajou University, Suwon, Korea
| | - Stephen A. Boppart
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Beckman Institute for Advanced Science, Urbana, IL, USA
| | - Woonggyu Jung
- School of Nano-Bioscience and Chemical Engineering, School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan, Korea
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, Korea
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Lee S, Kwon O, Jeon M, Song J, Shin S, Kim H, Jo M, Rim T, Doh J, Kim S, Son J, Kim Y, Kim C. Super-resolution visible photoactivated atomic force microscopy. Light Sci Appl 2017; 6:e17080. [PMID: 30167212 PMCID: PMC6062039 DOI: 10.1038/lsa.2017.80] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 04/26/2017] [Accepted: 05/01/2017] [Indexed: 05/05/2023]
Abstract
Imaging the intrinsic optical absorption properties of nanomaterials with optical microscopy (OM) is hindered by the optical diffraction limit and intrinsically poor sensitivity. Thus, expensive and destructive electron microscopy (EM) has been commonly used to examine the morphologies of nanostructures. Further, while nanoscale fluorescence OM has become crucial for investigating the morphologies and functions of intracellular specimens, this modality is not suitable for imaging optical absorption and requires the use of possibly undesirable exogenous fluorescent molecules for biological samples. Here we demonstrate super-resolution visible photoactivated atomic force microscopy (pAFM), which can sense intrinsic optical absorption with ~8 nm resolution. Thus, the resolution can be improved down to ~8 nm. This system can detect not only the first harmonic response, but also the higher harmonic response using the nonlinear effect. The thermoelastic effects induced by pulsed laser irradiation allow us to obtain visible pAFM images of single gold nanospheres, various nanowires, and biological cells, all with nanoscale resolution. Unlike expensive EM, the visible pAFM system can be simply implemented by adding an optical excitation sub-system to a commercial atomic force microscope.
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Affiliation(s)
- Seunghyun Lee
- Future IT Innovation Laboratory, Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Owoong Kwon
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, Republic of Korea
| | - Mansik Jeon
- Future IT Innovation Laboratory, Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
- School of Electronics Engineering, Kyungpook National University (KNU), Daegu, Republic of Korea
| | - Jaejung Song
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Seungjun Shin
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - HyeMi Kim
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Minguk Jo
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Taiuk Rim
- Future IT Innovation Laboratory, Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Junsang Doh
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Sungjee Kim
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Junwoo Son
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Yunseok Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, Republic of Korea
| | - Chulhong Kim
- Future IT Innovation Laboratory, Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
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Wijesinghe RE, Lee SY, Kim P, Jung HY, Jeon M, Kim J. Optical sensing method to analyze germination rate of Capsicum annum seeds treated with growth-promoting chemical compounds using optical coherence tomography. J Biomed Opt 2017; 22:91502. [PMID: 28055058 DOI: 10.1117/1.jbo.22.9.091502] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 11/10/2016] [Indexed: 06/06/2023]
Abstract
Seed germination rate differs based on chemical treatments, and nondestructive measurements of germination rate have become an essential requirement in the field of agriculture. Seed scientists and other biologists are interested in optical sensing technologies-based biological discoveries due to nondestructive detection capability. Optical coherence tomography (OCT) has recently emerged as a powerful method for biological and plant material discoveries. We report an extended application of OCT by monitoring the germination rate acceleration of chemically primed seeds. To validate the versatility of the method, Capsicum annum seeds were primed using three chemical compounds: sterile distilled water (SDW), butandiol, and 1-hexadecene. Monitoring was performed using a 1310-nm swept source OCT system. The results confirmed more rapid morphological variations in the seeds treated with 1-hexadecene medium than the seeds treated with SDW and butandiol within 8 consecutive days. In addition, fresh weight measurements (gold standard) of seeds were monitored for 15 days, and the obtained results were correlated with the OCT results. Thus, such a method can be used in various agricultural fields, and OCT shows potential as a rigorous sensing method for selecting the optimal plant growth-promoting chemical compounds rapidly, when compared with the gold standard methods.
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Affiliation(s)
- Ruchire Eranga Wijesinghe
- Kyungpook National University, College of IT Engineering, School of Electronics Engineering, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Seung-Yeol Lee
- Kyungpook National University, School of Applied Biosciences, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Pilun Kim
- Oz-tec, Institute of Optics Image Diagnostic Technology, no 901, IT Convergence Industrial Building, 47, Gyeongdae-ro, 17-gil, Buk-gu, Daegu 41566, Republic of Korea
| | - Hee-Young Jung
- Kyungpook National University, School of Applied Biosciences, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Mansik Jeon
- Kyungpook National University, College of IT Engineering, School of Electronics Engineering, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Jeehyun Kim
- Kyungpook National University, College of IT Engineering, School of Electronics Engineering, 80, Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
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Lee J, Kwon H, Song J, Jeon M, Kim J. Development of a Handheld Line Information Reader and Generator for Efficient Management of Optical Communication Lines. Sensors (Basel) 2017; 17:E1950. [PMID: 28837058 PMCID: PMC5620996 DOI: 10.3390/s17091950] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 08/20/2017] [Accepted: 08/22/2017] [Indexed: 11/16/2022]
Abstract
A handheld line information reader and a line information generator were developed for the efficient management of optical communication lines. The line information reader consists of a photo diode, trans-impedance amplifier, voltage amplifier, microcontroller unit, display panel, and communication modules. The line information generator consists of a laser diode, laser driving circuits, microcontroller unit, and communication modules. The line information reader can detect the optical radiation field of the test line by bending the optical fiber. To enhance the sensitivity of the line information reader, an additional lens was used with a focal length of 4.51 mm. Moreover, the simulation results obtained through BeamPROP® software from Synopsys, Inc. demonstrated a stronger optical radiation field of the fiber due to a longer transmission wavelength and larger bending angle of the fiber. Therefore, the developed devices can be considered as useful tools for the efficient management of optical communication lines.
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Affiliation(s)
- Jaeyul Lee
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Hyungwoo Kwon
- TDI Co. Ltd., 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Jaewon Song
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
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Ravichandran NK, Wijesinghe RE, Lee SY, Choi KS, Jeon M, Jung HY, Kim J. Non-Destructive Analysis of the Internal Anatomical Structures of Mosquito Specimens Using Optical Coherence Tomography. Sensors (Basel) 2017; 17:E1897. [PMID: 28817086 PMCID: PMC5580080 DOI: 10.3390/s17081897] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 08/14/2017] [Accepted: 08/15/2017] [Indexed: 12/15/2022]
Abstract
The study of mosquitoes and analysis of their behavior are of crucial importance in the on-going efforts to control the alarming increase in mosquito-borne diseases. Furthermore, a non-destructive and real-time imaging technique to study the anatomical features of mosquito specimens can greatly aid the study of mosquitoes. In this study, we demonstrate the three-dimensional imaging capabilities of optical coherence tomography (OCT) for structural analysis of Anopheles sinensis mosquitoes. The anatomical features of An. sinensis head, thorax, and abdominal regions, along with the morphology of internal structures, such as foregut, midgut, and hindgut, were studied using OCT imaging. Two-dimensional and three-dimensional OCT images, used in conjunction with histological images, proved useful for anatomical analysis of mosquito specimens. By presenting this work as an initial study, we demonstrate the applicability of OCT for future mosquito-related entomological research, and also in identifying changes in mosquito anatomical structure.
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Affiliation(s)
- Naresh Kumar Ravichandran
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Ruchire Eranga Wijesinghe
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Seung-Yeol Lee
- School of Applied Biosciences, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Kwang Shik Choi
- School of Life Sciences, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Hee-Young Jung
- School of Applied Biosciences, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
| | - Jeehyun Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea.
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Wijesinghe RE, Lee SY, Ravichandran NK, Han S, Jeong H, Han Y, Jung HY, Kim P, Jeon M, Kim J. Optical coherence tomography-integrated, wearable (backpack-type), compact diagnostic imaging modality for in situ leaf quality assessment: publisher's note. Appl Opt 2017; 56:3023. [PMID: 28414359 DOI: 10.1364/ao.56.003023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This note points out additional funding that was not added to Appl. Opt.56, D108 (2017)APOPAI0003-693510.1364/AO.56.00D108.
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Wijesinghe RE, Lee SY, Ravichandran NK, Han S, Jeong H, Han Y, Jung HY, Kim P, Jeon M, Kim J. Optical coherence tomography-integrated, wearable (backpack-type), compact diagnostic imaging modality for in situ leaf quality assessment. Appl Opt 2017; 56:D108-D114. [PMID: 28375377 DOI: 10.1364/ao.56.00d108] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We developed a compact, wearable diagnostic imaging modality employing optical coherence tomography for in situ plant leaf quality assessments. This system is capable of diagnosing infected leaves at the initial disease stages. Our system is a versatile backpack-type imaging modality with a compact spectrometer, miniature computer, rechargeable power source, and handheld inspection probe. This method enhances real-time in situ specimen inspection through direct implementation of the imaging modality in a plantation. To evaluate the initial performance, field experiments were conducted in apple, pear, and persimmon plantations. Based on the obtained results, we can conclude that the developed imaging modality can be considered as a promising, efficient, convenient, and fast in situ inspection technique for various agricultural fields, which minimizes the limitations of complex tabletop inspection modalities.
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Park K, Cho NH, Jang JH, Lee SH, Kim P, Jeon M, Boppart SA, Kim J, Jung W. In vivo 3D imaging of the human tympanic membrane using a wide-field diagonal-scanning optical coherence tomography probe. Appl Opt 2017; 56:D115-D119. [PMID: 28375378 PMCID: PMC5508522 DOI: 10.1364/ao.56.00d115] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
A wide-field optical coherence tomography (OCT) probe was developed that adapts a diagonal-scanning scheme for three-dimensional (3D) in vivo imaging of the human tympanic membrane. The probe consists of a relay lens to enhance the lateral scanning range up to 7 mm. Motion artifacts that occur with the use of handheld probes were found to be decreased owing to the diagonal-scanning pattern, which crosses the center of the sample to facilitate entire 3D scans. 3D images could be constructed from a small number of two-dimensional OCT images acquired using the diagonal-scanning technique. To demonstrate the usefulness and performance of the developed system with the handheld probe, in vivo tympanic membranes of humans and animals were imaged in real time.
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Affiliation(s)
- Kibeom Park
- School of Electronics Engineering, Kyungpook National University, Daegu 702-701, South Korea
- Oz-tec Co., Ltd., Daegu 702-701, South Korea
| | - Nam Hyun Cho
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear Infirmary (MEEI), 243, Charles Street, Boston, Massachusetts 02114, USA
- Department of Otology and Laryngology, Harvard Medical School, 243, Charles Street, Boston, Massachusetts 02114, USA
| | - Jeong Hun Jang
- Department of Otolaryngology, Ajou University School of Medicine, 164 World cup-ro, Yeongtong-gu, Suwon, South Korea
| | - Sang Heun Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Daegu Veterans Hospital, Daegu 704-802, South Korea
| | - Pilun Kim
- Oz-tec Co., Ltd., Daegu 702-701, South Korea
| | - Mansik Jeon
- School of Electronics Engineering, Kyungpook National University, Daegu 702-701, South Korea
| | - Stephen A. Boppart
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois 61801, USA
| | - Jeehyun Kim
- School of Electronics Engineering, Kyungpook National University, Daegu 702-701, South Korea
| | - Woonggyu Jung
- Ulsan National Institute of Science and Technology, School of Nano-Bioscience and Chemical Engineering, 689-798, South Korea
- Corresponding author:
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Zhang Y, Hong H, Sun B, Carter K, Qin Y, Wei W, Wang D, Jeon M, Geng J, Nickles RJ, Chen G, Prasad PN, Kim C, Xia J, Cai W, Lovell JF. Surfactant-stripped naphthalocyanines for multimodal tumor theranostics with upconversion guidance cream. Nanoscale 2017; 9:3391-3398. [PMID: 28247896 PMCID: PMC5435468 DOI: 10.1039/c6nr09321c] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Surfactant-stripped, nanoformulated naphthalocyanines (nanonaps) can be formed with Pluronic F127 and low temperature membrane processing, resulting in dispersed frozen micelles with extreme contrast in the near infrared region. Here, we demonstrate that nanonaps can be used for multifunctional cancer theranostics. This includes lymphatic mapping and whole tumor photoacoustic imaging following intradermal or intravenous injection in rodents. Without further modification, pre-formed nanonaps were used for positron emission tomography and passively accumulated in subcutaneous murine tumors. Because the nanonaps used absorb light beyond the visible range, a topical upconversion skin cream was developed for anti-tumor photothermal therapy with laser placement that can be guided by the naked eye.
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Affiliation(s)
- Yumiao Zhang
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA. and Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
| | - Hao Hong
- Center for Molecular Imaging, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Boyang Sun
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA. and Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
| | - Kevin Carter
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA.
| | - Yiru Qin
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA.
| | - Wei Wei
- Institute for Lasers, Photonics, and Biophotonics and Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
| | - Depeng Wang
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA.
| | - Mansik Jeon
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 702701, Korea
| | - Jumin Geng
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA.
| | - Robert J Nickles
- Department of Radiology and Medical Physics, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA
| | - Guanying Chen
- Institute for Lasers, Photonics, and Biophotonics and Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, USA and School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, People's Republic of China
| | - Paras N Prasad
- Institute for Lasers, Photonics, and Biophotonics and Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
| | - Chulhong Kim
- Creative IT Engineering, Pohang University of Science and Technology, 790784, Korea
| | - Jun Xia
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA.
| | - Weibo Cai
- Department of Radiology and Medical Physics, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA
| | - Jonathan F Lovell
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA. and Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
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41
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Song JS, Takimoto K, Jeon M, Vadakekalam J, Ruparel NB, Diogenes A. Decellularized Human Dental Pulp as a Scaffold for Regenerative Endodontics. J Dent Res 2017; 96:640-646. [PMID: 28196330 DOI: 10.1177/0022034517693606] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Teeth undergo postnatal organogenesis relatively late in life and only complete full maturation a few years after the crown first erupts in the oral cavity. At this stage, development can be arrested if the tooth organ is damaged by either trauma or caries. Regenerative endodontic procedures (REPs) are a treatment alternative to conventional root canal treatment for immature teeth. These procedures rely on the transfer of apically positioned stem cells, including stem cells of the apical papilla (SCAP), into the root canal system. Although clinical success has been reported for these procedures, the predictability of expected outcomes and the organization of the newly formed tissues are affected by the lack of an available suitable scaffold that mimics the complexity of the dental pulp extracellular matrix (ECM). In this study, we evaluated 3 methods of decellularization of human dental pulp to be used as a potential autograft scaffold. Tooth slices of human healthy extracted third molars were decellularized by 3 different methods. One of the methods generated the maximum observed decellularization with minimal impact on the ECM composition and organization. Furthermore, recellularization of the scaffold supported the proliferation of SCAP throughout the scaffold with differentiation into odontoblast-like cells near the dentinal walls. Thus, this study reports that human dental pulp from healthy extracted teeth can be successfully decellularized, and the resulting scaffold supports the proliferation and differentiation of SCAP. The future application of this form of an autograft in REPs can fulfill a yet unmet need for a suitable scaffold, potentially improving clinical outcomes and ultimately promoting the survival and function of teeth with otherwise poor prognosis.
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Affiliation(s)
- J S Song
- 1 Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,2 Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - K Takimoto
- 1 Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - M Jeon
- 3 Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - J Vadakekalam
- 1 Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - N B Ruparel
- 1 Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - A Diogenes
- 1 Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
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42
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Lee J, Kim K, Wijesinghe RE, Jeon D, Lee SH, Jeon M, Jang JH. Decalcification using ethylenediaminetetraacetic acid for clear microstructure imaging of cochlea through optical coherence tomography. J Biomed Opt 2016; 21:081204. [PMID: 26979048 DOI: 10.1117/1.jbo.21.8.081204] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 02/23/2016] [Indexed: 06/05/2023]
Abstract
The aim of this study was to analyze the effectiveness of decalcification using ethylenediaminetetraacetic acid (EDTA) as an optical clearing method to enhance the depth visibility of internal soft tissues of cochlea. Ex vivo mouse and guinea pig cochlea samples were soaked in EDTA solutions for decalcification, and swept source optical coherence tomography (OCT) was used as imaging modality to monitor the decalcified samples consecutively. The monitored noninvasive cross-sectional images showed that the mouse and guinea pig cochlea samples had to be decalcified for subsequent 7 and 14 days, respectively, to obtain the optimal optical clearing results. Using this method, difficulties in imaging of internal cochlea microstructures of mice could be evaded. The obtained results verified that the depth visibility of the decalcified ex vivo samples was enhanced.
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Affiliation(s)
- Jaeyul Lee
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Kanghae Kim
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Ruchire Eranga Wijesinghe
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Doekmin Jeon
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Sang Heun Lee
- Daegu Veterans Hospital, Department of Otorhinolaryngology, 60 Wolgok-ro, Dalseo-gu, Daegu 42835, Republic of Korea
| | - Mansik Jeon
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Jeong Hun Jang
- Ajou University, School of Medicine, Department of Otorhinolaryngology-Head and Neck Surgery, 164 World cup-ro, Yeongtong-gu, Suwon, Gyeonggi-do 41944, Republic of Korea
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43
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Yoon J, Choi B, Choi S, Lee J, Lee J, Jeon M, Lee Y, Han J, Lee J, Kim DM, Kim DH, Kim S, Choi SJ. Evaluation of interface trap densities and quantum capacitance in carbon nanotube network thin-film transistors. Nanotechnology 2016; 27:295704. [PMID: 27285674 DOI: 10.1088/0957-4484/27/29/295704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The interface trap density in single-walled carbon nanotube (SWNT) network thin-film transistors (TFTs) is a fundamental and important parameter for assessing the electronic performance of TFTs. However, the number of studies on the extraction of interface trap densities, particularly in SWNT TFTs, has been insufficient. In this work, we propose an efficient technique for extracting the energy-dependent interface traps in SWNT TFTs. From the measured dispersive, frequency-dependent capacitance-voltage (C-V) characteristics, the dispersive-free, frequency-independent C-V curve was obtained, thus enabling the extraction and analysis of the interface trap density, which was found to be approximately 8.2 × 10(11) eV(-1) cm(-2) at the valence band edge. The frequency-independent C-V curve also allows further extraction of the quantum capacitance in the SWNT network without introducing any additional fitting process or parameters. We found that the extracted value of the quantum capacitance in SWNT networks is lower than the theoretical value in aligned SWNTs due to the cross point of SWNTs on the SWNT network. Therefore, the method proposed in this work indicates that the C-V measurement is a powerful tool for obtaining deep physical insights regarding the electrical performance of SWNT TFTs.
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Affiliation(s)
- J Yoon
- School of Electrical Engineering, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 02707, Korea
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44
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Ravichandran NK, Wijesinghe RE, Shirazi MF, Park K, Jeon M, Jung W, Kim J. Depth enhancement in spectral domain optical coherence tomography using bidirectional imaging modality with a single spectrometer. J Biomed Opt 2016; 21:76005. [PMID: 27401937 DOI: 10.1117/1.jbo.21.7.076005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 06/16/2016] [Indexed: 06/06/2023]
Abstract
A method for depth enhancement is presented using a bidirectional imaging modality for spectral domain optical coherence tomography (SD-OCT). Two precisely aligned sample arms along with two reference arms were utilized in the optical configuration to scan the samples. Using exemplary images of the optical resolution target, Scotch tape, a silicon sheet with two needles, and a leaf, we demonstrated how the developed bidirectional SD-OCT imaging method increases the ability to characterize depth-enhanced images. The results of the developed system were validated by comparing the images with the standard OCT configuration (single-sample arm setup). Given the advantages of higher resolution and the ability to visualize deep morphological structures, this method can be utilized to increase the depth dependent fall-off in samples with limited thickness. Thus, the proposed bidirectional imaging modality is apt for cross-sectional imaging of entire samples, which has the potential capability to improve the diagnostic ability.
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Affiliation(s)
- Naresh Kumar Ravichandran
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Ruchire Eranga Wijesinghe
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Muhammad Faizan Shirazi
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Kibeom Park
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Mansik Jeon
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Woonggyu Jung
- Ulsan National Institute of Science and Technology, Department of Biomedical Engineering, 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Jeehyun Kim
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
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45
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Abstract
Herein we report the synthesis of new gold nanoparticle-bacteriochlorin conjugate (Au-NP-PS) as a highly efficient photoacoustic (PA) imaging agent. The conjugate was obtained by reacting a water soluble thio-bacteriochlorin (derived from bacteriochlorophyll-[Formula: see text] with Au-NP. The resulting NPs were characterized by UV-vis, TEM (transmission electron microscopy)/HRTEM (high resolution TEM) and diffraction pattern. The results obtained from in vitro studies suggest that due to conjugation between the PS and Au-NPs, the photoacoustic (PA) signals from the Au-NP-PS were greatly enhanced by a factor of 2.4 compared to that from PS alone.
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Affiliation(s)
- Avinash Srivatsan
- Photodynamic Therapy Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Mansik Jeon
- Bio Optics and Acoustics Laboratory, Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
- Department of Creative IT Engineering (CiTE), Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyungbuk, 790-784, Republic of Korea
- School of Electronics Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 702-701, Republic of Korea
| | - Yanfang Wang
- Photodynamic Therapy Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Yihui Chen
- Photodynamic Therapy Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Chulhong Kim
- Bio Optics and Acoustics Laboratory, Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
- Department of Creative IT Engineering (CiTE), Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyungbuk, 790-784, Republic of Korea
| | - Ravindra K. Pandey
- Photodynamic Therapy Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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46
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Wijesinghe RE, Park K, Kim DH, Jeon M, Kim J. In vivo imaging of melanoma-implanted magnetic nanoparticles using contrast-enhanced magneto-motive optical Doppler tomography. J Biomed Opt 2016; 21:64001. [PMID: 27334932 DOI: 10.1117/1.jbo.21.6.064001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 06/01/2016] [Indexed: 06/06/2023]
Abstract
We conducted an initial feasibility study using real-time magneto-motive optical Doppler tomography (MM-ODT) with enhanced contrast to investigate the detection of superparamagnetic iron oxide (SPIO) magnetic nanoparticles implanted into in vivo melanoma tissue. The MM-ODT signals were detected owing to the phase shift of the implanted magnetic nanoparticles, which occurred due to the action of an applied magnetic field. An amplifier circuit-based solenoid was utilized for generating high-intensity oscillating magnetic fields. The MM-ODT system was confirmed as an effective in vivo imaging method for detecting melanoma tissue, with the performance comparable to those of conventional optical coherence tomography and optical Doppler tomography methods. Moreover, the optimal values of the SPIO nanoparticles concentration and solenoid voltage for obtaining the uppermost Doppler velocity were derived as well. To improve the signal processing speed for real-time imaging, we adopted multithread programming techniques and optimized the signal path. The results suggest that this imaging modality can be used as a powerful tool to identify the intracellular and extracellular SPIO nanoparticles in melanoma tissues in vivo.
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Affiliation(s)
- Ruchire Eranga Wijesinghe
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Kibeom Park
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Dong-Hyeon Kim
- 3D Convergence Technology Center, 70 Dongnae-ro, Daegu 41061, Republic of Korea
| | - Mansik Jeon
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Jeehyun Kim
- Kyungpook National University, School of Electronics Engineering, College of IT Engineering, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
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47
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Jeon M, Choi H, Lee SI, Kim JS, Park M, Kim K, Lee S, Byun SJ. GRP78 is required for cell proliferation and protection from apoptosis in chicken embryo fibroblast cells. Poult Sci 2016; 95:1129-36. [PMID: 26944959 DOI: 10.3382/ps/pew016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 12/11/2015] [Indexed: 12/30/2022] Open
Abstract
Chicken serum has been suggested as a supplement to promote chicken cell proliferation and development. However, the molecular mechanisms by which chicken serum stimulates chicken cell proliferation remain unknown. Here, we evaluated the effects of chicken serum supplementation on chicken embryo fibroblast (CEF) and DF-1 cell proliferation. We also sought to elucidate the molecular pathways involved in mediating the effects of chicken serum on fibroblasts and DF-1 cells by overexpression of chicken 78 kDa glucose-regulated protein (chGRP78), which is important for cell growth and the prevention of apoptosis. Our data demonstrated that the addition of 5% chicken serum significantly enhanced fibroblast proliferation. Moreover, knockdown of chGRP78 using siRNA decreased fibroblast proliferation and increased apoptosis. Based on these results, we suggest that the chGRP78-mediated signaling pathway plays a critical role in chicken serum-stimulated fibroblast survival and anti-apoptosis. Therefore, our findings have important implications for the maintenance of chicken fibroblast cells through the inhibition of apoptosis and may lead to the development of new treatments for avian disease.
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Affiliation(s)
- M Jeon
- Animal Biotechnology Division, National Institute of Animal Science, RDA, 1500, Kongjwipatjwi-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do, 565-851, Republic of Korea
| | - H Choi
- Animal Biotechnology Division, National Institute of Animal Science, RDA, 1500, Kongjwipatjwi-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do, 565-851, Republic of Korea
| | - S I Lee
- Department of Animal Resources Science, Dankook University, Cheonan, Choongam, 330-714 Republic of Korea
| | - J S Kim
- Animal Biotechnology Division, National Institute of Animal Science, RDA, 1500, Kongjwipatjwi-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do, 565-851, Republic of Korea
| | - M Park
- Animal Biotechnology Division, National Institute of Animal Science, RDA, 1500, Kongjwipatjwi-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do, 565-851, Republic of Korea
| | - K Kim
- Animal Biotechnology Division, National Institute of Animal Science, RDA, 1500, Kongjwipatjwi-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do, 565-851, Republic of Korea
| | - S Lee
- Department of Genetic Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon 440-746, Republic of Korea
| | - S J Byun
- Animal Biotechnology Division, National Institute of Animal Science, RDA, 1500, Kongjwipatjwi-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do, 565-851, Republic of Korea
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48
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KIM Y, Kim D, Jeon M, Gordon A, Larson A, Chung J. Intraarterial targeted delivery of porous magnetic nano-clusters combined with iodinated oil in a liver cancer model. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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49
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Abstract
Light-absorbing nanoparticles for localized heat generation in tissues have various biomedical applications in diagnostic imaging, surgery, and therapies. Although numerous plasmonic and carbon-based nanoparticles with strong optical absorption have been developed, their clearance, potential cytotoxicity, and long-term safety issues remain unresolved. Here, we show that "generally regarded as safe (GRAS)" melanoidins prepared from glucose and amino acid offer a high light-to-heat conversion efficiency, biocompatibility, biodegradability, nonmutagenicity, and efficient renal clearance, as well as a low cost for synthesis. We exhibit a wide range of biomedical photonic applications of melanoidins, including in vivo photoacoustic mapping of sentinel lymph nodes, photoacoustic tracking of gastrointestinal tracts, photothermal cancer therapy, and photothermal lipolysis. The biodegradation rate and renal clearance of melanoidins are controllable by design. Our results confirm the feasibility of biodegradable melanoidins for various photonic applications to theranostic nanomedicines.
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Affiliation(s)
- Min-Young Lee
- Medical Device Research Center, Samsung Biomedical Research Institute, Samsung Advanced Institute of Technology (SAIT), Samsung Electronics Company Ltd. , Seoul 135-710, Korea
| | | | | | | | - Ki Su Kim
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital , 65 Landsdowne Street UP-5, Cambridge, Massachusetts 02139, United States
| | - Seok Hyun Yun
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital , 65 Landsdowne Street UP-5, Cambridge, Massachusetts 02139, United States
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50
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Song J, Kim J, Hwang S, Jeon M, Jeong S, Kim C, Kim S. “Smart” gold nanoparticles for photoacoustic imaging: an imaging contrast agent responsive to the cancer microenvironment and signal amplification via pH-induced aggregation. Chem Commun (Camb) 2016; 52:8287-90. [DOI: 10.1039/c6cc03100e] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
pH-Responsive “smart” gold nanoparticles were demonstrated as a new photoacoustic imaging agent that can selectively respond to the cancer microenvironment and show the amplified signal in vivo.
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Affiliation(s)
- Jaejung Song
- School of Interdisciplinary Bioscience and Bioengineering
- Pohang University of Science and Technology
- Pohang University of Science and Technology (POSTECH)
- Pohang
- South Korea
| | - Jeesu Kim
- Department of Electrical Engineering and Creative IT Engineering
- POSTECH
- Pohang
- South Korea
| | - Sekyu Hwang
- Department of Chemistry
- POSTECH
- Pohang
- South Korea
| | - Mansik Jeon
- School of Electronics Engineering College of IT Engineering
- Kyungpook National University
- Buk-gu
- South Korea
| | | | - Chulhong Kim
- Department of Electrical Engineering and Creative IT Engineering
- POSTECH
- Pohang
- South Korea
| | - Sungjee Kim
- School of Interdisciplinary Bioscience and Bioengineering
- Pohang University of Science and Technology
- Pohang University of Science and Technology (POSTECH)
- Pohang
- South Korea
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