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Carney BC, Oliver MA, Kurup S, Collins M, Keyloun JW, Moffatt LT, Shupp JW, Travis TE. Laser-assisted drug delivery of synthetic alpha melanocyte stimulating hormone and L-tyrosine leads to increased pigmentation area and expression of melanogenesis genes in a porcine hypertrophic scar model. Lasers Surg Med 2023. [PMID: 37051852 DOI: 10.1002/lsm.23663] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 03/17/2023] [Accepted: 03/31/2023] [Indexed: 04/14/2023]
Abstract
OBJECTIVES One symptom of hypertrophic scar (HTS) that can develop after burn injury is dyschromia with hyper- and hypopigmentation. There are limited treatments for these conditions. Previously, we showed there is no expression of alpha melanocyte stimulating hormone (α-MSH) in hypopigmented scars, and if these melanocytes are treated with synthetic α-MSH in vitro, they respond by repigmenting. The current study tested the same hypothesis in the in vivo environment using laser-assisted drug delivery (LADD). METHODS HTSs were created in red Duroc pigs. At Day 77 (pre), they were treated with CO2 fractional ablative laser (FLSR). Synthetic α-MSH was delivered as a topical solution dissolved in l-tyrosine (n = 6, treated). Control scars received LADD of l-tyrosine only (n = 2, control). Scars were treated and examined weekly through Week 4. Digital images and punch biopsies of hyper, hypo-, and normally pigmented scar and skin were collected. Digital pictures were analyzed with ImageJ by tracing the area of hyperpigmentation. Epidermal sheets were obtained from punch biopsies through dispase separation and RNA was isolated. qRT-PCR was run for melanogenesis-related genes: tyrosinase (TYR), tyrosinase-related protein-1 (TYRP1), and dopachrome tautomerase (DCT). Two-way ANOVA with multiple comparisons and Dunnett's correction compared the groups. RESULTS The areas of hyperpigmentation were variable before treatment. Therefore, data is represented as fold-change where each scar was normalized to its own pre value. Within the LADD of NDP α-MSH + l-tyrosine group, hyperpigmented areas gradually increased each week, reaching 1.3-fold over pre by Week 4. At each timepoint, area of hyperpigmentation was greater in the treated versus the control (1.04 ± 0.05 vs. 0.89 ± 0.08, 1.21 ± 0.07 vs. 0.98 ± 0.24, 1.21 ± 0.08 vs. 1.04 ± 0.11, 1.28 ± 0.11 vs. 0.94 ± 0.25; fold-change from pre-). Within the treatment group, pretreatment, levels of TYR were decreased -17.76 ± 4.52 below the level of normal skin in hypopigmented scars. After 1 treatment, potentially due to laser fractionation, the levels decreased to -43.49 ± 5.52. After 2, 3, and 4 treatments, there was ever increasing levels of TYR to almost the level of normally pigmented skin (-35.74 ± 15.72, -23.25 ± 6.80, -5.52 ± 2.22 [p < 0.01, Week 4]). This pattern was also observed for TYRP1 (pre = -12.94 ± 1.82, Week 1 = -48.85 ± 13.25 [p < 0.01], Weeks 2, 3, and 4 = -34.45 ± 14.64, -28.19 ± 4.98, -6.93 ± 3.05 [p < 0.01, Week 4]) and DCT (pre = -214.95 ± 89.42, Week 1 = -487.93 ± 126.32 [p < 0.05], Weeks 2, 3, and 4 = -219.06 ± 79.33, -72.91 ± 20.45 [p < 0.001], -76.00 ± 24.26 [p < 0.001]). Similar patterns were observed for scars treated with LADD of l-tyrosine alone without NDP α-MSH. For each gene, in hyperpigmented scar, levels increased at Week 4 of treatment compared to Week 1 (p < 0.01). CONCLUSIONS A clinically-relevant FLSR treatment method can be combined with topical delivery of synthetic α-MSH and l-tyrosine to increase the area of pigmentation and expression of melanogenesis genes in hypopigmented HTS. LADD of l-tyrosine alone leads to increased expression of melanogenesis genes. Future studies will aim to optimize drug delivery, timing, and dosing.
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Affiliation(s)
- Bonnie C Carney
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, District of Columbia, USA
- Department of Surgery, Georgetown University School of Medicine, Washington, District of Columbia, USA
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - Mary A Oliver
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, District of Columbia, USA
| | - Sanjana Kurup
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, District of Columbia, USA
- Howard University College of Medicine, Washington, District of Columbia, USA
| | - Monica Collins
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, District of Columbia, USA
- Georgetown University School of Medicine, Washington, District of Columbia, USA
| | - John W Keyloun
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, District of Columbia, USA
- Department of Surgery, The Burn Center, MedStar Washington Hospital Center, Washington, District of Columbia, USA
| | - Lauren T Moffatt
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, District of Columbia, USA
- Department of Surgery, Georgetown University School of Medicine, Washington, District of Columbia, USA
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - Jeffrey W Shupp
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, District of Columbia, USA
- Department of Surgery, Georgetown University School of Medicine, Washington, District of Columbia, USA
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, District of Columbia, USA
- Department of Surgery, The Burn Center, MedStar Washington Hospital Center, Washington, District of Columbia, USA
| | - Taryn E Travis
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, District of Columbia, USA
- Department of Surgery, Georgetown University School of Medicine, Washington, District of Columbia, USA
- Georgetown University School of Medicine, Washington, District of Columbia, USA
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In Vivo Identification of Skin Photodamage Induced by Fractional CO2 and Picosecond Nd:YAG Lasers with Optical Coherence Tomography. Diagnostics (Basel) 2022; 12:diagnostics12040822. [PMID: 35453872 PMCID: PMC9027631 DOI: 10.3390/diagnostics12040822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/17/2022] [Accepted: 03/24/2022] [Indexed: 12/04/2022] Open
Abstract
Fractional laser treatment is commonly used for dermatological applications, enabling effective induction of collagen regeneration and significantly reducing recovery time. However, it is challenging to observe laser-induced photodamage beneath the tissue surface in vivo, making the non-invasive evaluation of treatment outcomes difficult. For in vivo real-time study of the photodamage induced by fractional pulsed CO2 and Nd:YAG lasers commonly utilized for clinical therapy, a portable spectral-domain optical coherence tomography (SD-OCT) system was implemented for clinical studies. The photodamage caused by two lasers, including photothermal and photoacoustic effects, was investigated using OCT, together with the correlation between photodamage and exposure energy. Additionally, to investigate the change in the optical properties of tissue due to photodamage, the attenuation coefficients and damaged areas of normal skin and laser-treated skin were estimated for comparison. Finally, the recovery of the exposed skin with both lasers was also compared using OCT. The results show that OCT can be a potential solution for in vivo investigation of laser-induced tissue damage and quantitative evaluation.
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Eriksson E, Liu PY, Schultz GS, Martins‐Green MM, Tanaka R, Weir D, Gould LJ, Armstrong DG, Gibbons GW, Wolcott R, Olutoye OO, Kirsner RS, Gurtner GC. Chronic wounds: Treatment consensus. Wound Repair Regen 2022; 30:156-171. [PMID: 35130362 PMCID: PMC9305950 DOI: 10.1111/wrr.12994] [Citation(s) in RCA: 79] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 12/23/2021] [Accepted: 01/09/2022] [Indexed: 12/17/2022]
Abstract
The Wound Healing Foundation (WHF) recognised a need for an unbiased consensus on the best treatment of chronic wounds. A panel of 13 experts were invited to a virtual meeting which took place on 27 March 2021. The proceedings were organised in the sub-sections diagnosis, debridement, infection control, dressings, grafting, pain management, oxygen treatment, outcomes and future needs. Eighty percent or better concurrence among the panellists was considered a consensus. A large number of critical questions were discussed and agreed upon. Important takeaways included that wound care needs to be simplified to a point that it can be delivered by the patient or the patient's family. Another one was that telemonitoring, which has proved very useful during the COVID-19 pandemic, can help reduce the frequency of interventions by a visiting nurse or a wound care center. Defining patient expectations is critical to designing a successful treatment. Patient outcomes might include wound specific outcomes such as time to heal, wound size reduction, as well as improvement in quality of life. For those patients with expectations of healing, an aggressive approach to achieve that goal is recommended. When healing is not an expectation, such as in patients receiving palliative wound care, outcomes might include pain reduction, exudate management, odour management and/or other quality of life benefits to wound care.
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Affiliation(s)
| | - Paul Y. Liu
- Department of Plastic Surgery, Rhode Island HospitalAlpert Medical School of Brown UniversityProvidenceRIUSA
| | - Gregory S. Schultz
- Department of Obstetrics and Gynecology and Institute for Wound ResearchUniversity of FloridaGainesvilleFAUSA
| | - Manuela M. Martins‐Green
- Department of Molecular, Cell and Systems BiologyLaboratory of Wound Healing Biology, University of CaliforniaRiversideCAUSA
| | - Rica Tanaka
- Juntendo University School of MedicineTokyoJapan
| | - Dot Weir
- Saratoga Hospital Center for Wound Healing and Hyperbaric MedicineSaratoga SpringsNew YorkUSA
| | - Lisa J. Gould
- Department of SurgerySouth Shore HospitalSouth WeymouthMassachusettsUSA
| | - David G. Armstrong
- Keck School of Medicine of University of Southern CaliforniaLos AngelesCAUSA
| | - Gary W. Gibbons
- Boston University School of Medicine, Center for Wound Healing South Shore HealthWeymouthMAUSA
| | | | - Oluyinka O. Olutoye
- Center for Regenerative MedicineAbigail Wexner Research Institute, Nationwide Children's HospitalColumbusOHUSA
- Department of SurgeryThe Ohio State UniversityColumbusOHUSA
| | - Robert S. Kirsner
- Dr Philip Frost Department of Dermatology and Cutaneous SurgeryUniversity of Miami Miller School of MedicineMiamiFAUSA
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Fan Y, Ma Q, Wang J, Wang W, Kang H. Evaluation of a 3.8-µm laser-induced skin injury and their repair with in vivo OCT imaging and noninvasive monitoring. Lasers Med Sci 2021; 37:1299-1309. [PMID: 34368917 DOI: 10.1007/s10103-021-03388-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/22/2021] [Indexed: 10/20/2022]
Abstract
To explore a 3.8-µm laser-induced damage and wound healing effect, we propose using optical coherence tomography (OCT) and a noninvasive monitoring-based in vivo evaluation method to quantitatively and qualitatively analyze the time-dependent biological effect of a 3.8-µm laser. The optical attenuation coefficient (OAC) is computed using a Fourier-domain algorithm. Three-dimensional (3-D) visualization of OCT images has been implemented to visualize the burnt spots. Furthermore, the burnt spots from the 3-D volumetric data was segmented and visualized, and the quantitative parameters of the burnt spots, such as the mean OACs, areas, and volumes, were computed. Then, OCT images and histological sections were analyzed to compare the structural changes. Within a certain radiation range, there is a linear relationship between radiation dose and temperature. Dermoscopic images, OCT images, and histological sections showed that, within a certain dose range, as the radiation doses increased, the cutaneous damage became more serious. One hour after laser radiation, the mean OACs increased and then decreased; the areas of burnt spots always increased and were 0.95 ± 0.07, 1.01 ± 0.06, 1.025 ± 0.07, 0.99 ± 0.07, 0.98 ± 0.07, 1.00 ± 0.07, 0.96 ± 0.05, and 0.98 ± 0.06 mm-1, respectively; the areas were 2.10 ± 0.63, 3.75 ± 1.85, 5.95 ± 1.62, 8.35 ± 0.88, 9.44 ± 1.28, 10.29 ± 0.49, 12.27 ± 0.96, and 13.127 ± 1.90 mm2; and the volumes were 1.54 ± 0.41, 2.86 ± 0.09, 3.73 ± 0.49, 4.14 ± 0.80, 7.21 ± 0.52, 6.77 ± 0.45, 8.36 ± 0.25, and 10.65 ± 0.51 mm3; and 21 days after laser radiation, the volumes were 0.67 ± 0.18, 1.64 ± 0.08, 1.87 ± 0.12, 2.57 ± 0.34, 3.43 ± 0.26, 3.64 ± 0.04, 3.84 ± 0.15, and 4.16 ± 0.53 mm3, respectively. We investigated the time-dependent biological effect of 3.8-µm laser-induced cutaneous damage and wound healing using the quantitative parameters of OCT imaging and noninvasive monitoring. The real-time temperature reflects the photothermal effect during laser radiation of mouse skin. OCT images of burnt spots were segmented to compute the mean OACs, burnt area, and quantitative volumes. This study has the potential for in vivo noninvasive and quantitative clinical evaluation in the future.
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Affiliation(s)
- Yingwei Fan
- Institute of Engineering Medicine, Beijing Institute of Technology, Beijing, 100081, China. .,Beijing Institute of Radiation Medicine, Beijing, 100850, China.
| | - Qiong Ma
- Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | | | | | - Hongxiang Kang
- Beijing Institute of Radiation Medicine, Beijing, 100850, China.
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Vedhanayagam M, Raja IS, Molkenova A, Atabaev TS, Sreeram KJ, Han DW. Carbon Dots-Mediated Fluorescent Scaffolds: Recent Trends in Image-Guided Tissue Engineering Applications. Int J Mol Sci 2021; 22:5378. [PMID: 34065357 PMCID: PMC8190637 DOI: 10.3390/ijms22105378] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/17/2021] [Accepted: 05/17/2021] [Indexed: 11/23/2022] Open
Abstract
Regeneration of damaged tissues or organs is one of the significant challenges in tissue engineering and regenerative medicine. Many researchers have fabricated various scaffolds to accelerate the tissue regeneration process. However, most of the scaffolds are limited in clinical trials due to scaffold inconsistency, non-biodegradability, and lack of non-invasive techniques to monitor tissue regeneration after implantation. Recently, carbon dots (CDs) mediated fluorescent scaffolds are widely explored for the application of image-guided tissue engineering due to their controlled architecture, light-emitting ability, higher chemical and photostability, excellent biocompatibility, and biodegradability. In this review, we provide an overview of the recent advancement of CDs in terms of their different synthesis methods, tunable physicochemical, mechanical, and optical properties, and their application in tissue engineering. Finally, this review concludes the further research directions that can be explored to apply CDs in tissue engineering.
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Affiliation(s)
- Mohan Vedhanayagam
- CATERS Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India;
| | - Iruthayapandi Selestin Raja
- BIO-IT Fusion Technology Research Institute, Pusan National University, Busan 46241, Korea; (I.S.R.); (A.M.)
| | - Anara Molkenova
- BIO-IT Fusion Technology Research Institute, Pusan National University, Busan 46241, Korea; (I.S.R.); (A.M.)
| | - Timur Sh. Atabaev
- Department of Chemistry, Nazarbayev University, Nur-Sultan 010000, Kazakhstan;
| | | | - Dong-Wook Han
- BIO-IT Fusion Technology Research Institute, Pusan National University, Busan 46241, Korea; (I.S.R.); (A.M.)
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Korea
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Fan Y, Ma Q, Xin S, Peng R, Kang H. Quantitative and Qualitative Evaluation of Supercontinuum Laser‐Induced Cutaneous Thermal Injuries and Their Repair With OCT Images. Lasers Surg Med 2020. [DOI: 10.1002/lsm.23287] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yingwei Fan
- Beijing Institute of Radiation Medicine Beijing 100850 China
| | - Qiong Ma
- Beijing Institute of Radiation Medicine Beijing 100850 China
| | - Shenghai Xin
- Department of Biomedical Engineering School of Medicine, Tsinghua University Beijing 100084 China
| | - Ruiyun Peng
- Beijing Institute of Radiation Medicine Beijing 100850 China
| | - Hongxiang Kang
- Beijing Institute of Radiation Medicine Beijing 100850 China
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Masson‐Meyers DS, Andrade TAM, Caetano GF, Guimaraes FR, Leite MN, Leite SN, Frade MAC. Experimental models and methods for cutaneous wound healing assessment. Int J Exp Pathol 2020; 101:21-37. [PMID: 32227524 PMCID: PMC7306904 DOI: 10.1111/iep.12346] [Citation(s) in RCA: 161] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 01/20/2020] [Accepted: 02/06/2020] [Indexed: 12/15/2022] Open
Abstract
Wound healing studies are intricate, mainly because of the multifaceted nature of the wound environment and the complexity of the healing process, which integrates a variety of cells and repair phases, including inflammation, proliferation, reepithelialization and remodelling. There are a variety of possible preclinical models, such as in mice, rabbits and pigs, which can be used to mimic acute or impaired for example, diabetic and nutrition-related wounds. These can be induced by many different techniques, with excision or incision being the most common. After determining a suitable model for a study, investigators need to select appropriate and reproducible methods that will allow the monitoring of the wound progression over time. The assessment can be performed by non-invasive protocols such as wound tracing, photographic documentation (including image analysis), biophysical techniques and/or by invasive protocols that will require wound biopsies. In this article, we provide an overview of some of the most often needed and used: (a) preclinical/animal models including incisional, excisional, burn and impaired wounds; (b) methods to evaluate the healing progression such as wound healing rate, wound analysis by image, biophysical assessment, histopathological, immunological and biochemical assays. The aim is to help researchers during the design and execution of their wound healing studies.
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Affiliation(s)
- Daniela S. Masson‐Meyers
- Marquette University School of DentistryMilwaukeeWisconsinUSA
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
| | - Thiago A. M. Andrade
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
- Graduate Program of Biomedical SciencesUniversity Center of Herminio Ometto Foundation (FHO)ArarasSao PauloBrazil
| | - Guilherme F. Caetano
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
- Graduate Program of Biomedical SciencesUniversity Center of Herminio Ometto Foundation (FHO)ArarasSao PauloBrazil
| | - Francielle R. Guimaraes
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
- University Center of Associated Schools of Education (UNIFAE)São João da Boa VistaSão PauloBrazil
| | - Marcel N. Leite
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
| | - Saulo N. Leite
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
- University Center of the Educational Foundation Guaxupe (UNIFEG)GuaxupeMinas GeraisBrazil
| | - Marco Andrey C. Frade
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
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Guo S, Wei S, Lee S, Sheu M, Kang S, Kang JU. Intraoperative Speckle Variance Optical Coherence Tomography for Tissue Temperature Monitoring During Cutaneous Laser Therapy. IEEE JOURNAL OF TRANSLATIONAL ENGINEERING IN HEALTH AND MEDICINE 2019; 7:1800608. [PMID: 32309052 PMCID: PMC6788854 DOI: 10.1109/jtehm.2019.2943317] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/13/2019] [Accepted: 09/19/2019] [Indexed: 01/18/2023]
Abstract
Background: Tissue temperature monitoring during cutaneous laser therapy can lead to safer and more effective treatments. In this study, we investigate the use of speckle variance optical coherence tomography (svOCT) to monitor real-time temperature changes in the excised human skin tissue sample during laser irradiation. Methods: To accomplish this, we combined the pulse laser system with a reference-based svOCT system. To calibrate the svOCT, the ex-vivo human skin samples from three individuals with tissues collected from the arm, face, and back were heated with 1-degree increments. Additionally, linear regression was used to extract and evaluate the linear relationship between the temperature and normalized speckle variance value. Experiments were conducted on excised human skin sample to monitor the temperature change during laser therapy with a svOCT system. Thermal modeling of ex-vivo human skin was used to numerically simulate the laser-tissue interaction and estimate the thermal diffusion and peak temperature of the tissue during the laser treatment. Results and Conclusion: These results showed that normalized speckle variance had a linear relationship with the tissue temperature before the onset of tissue coagulation (52°) and we were able to measure the rapid increase of the tissue temperature during laser therapy. The result of the experiment is also in good agreement with the numerical simulation result that estimated the laser-induced peak temperature and thermal relaxation time.
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Affiliation(s)
- Shoujing Guo
- Electrical and Computer Engineering DepartmentJohns Hopkins UniversityBaltimoreMD21218USA
| | - Shuwen Wei
- Electrical and Computer Engineering DepartmentJohns Hopkins UniversityBaltimoreMD21218USA
| | - Soohyun Lee
- Electrical and Computer Engineering DepartmentJohns Hopkins UniversityBaltimoreMD21218USA
| | - Mary Sheu
- Department of DermatologyJohns Hopkins Medicine - Green Spring StationLuthervilleMD21093USA
| | - Sewon Kang
- Department of DermatologyThe Johns Hopkins HospitalBaltimoreMD21287USA
| | - Jin U. Kang
- Electrical and Computer Engineering DepartmentJohns Hopkins UniversityBaltimoreMD21218USA
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Hansen FS, Wenande E, Haedersdal M, Fuchs CSK. Microneedle fractional radiofrequency-induced micropores evaluated by in vivo reflectance confocal microscopy, optical coherence tomography, and histology. Skin Res Technol 2019; 25:482-488. [PMID: 30659657 DOI: 10.1111/srt.12676] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 12/08/2018] [Indexed: 12/29/2022]
Abstract
BACKGROUND Microneedle fractional radiofrequency (MNRF) is a minimally invasive technique that delivers radiofrequency (RF) energy into the skin via microneedles. Reflectance confocal microscopy (RCM) and optical coherence tomography (OCT) enable the characterization of device-tissue interactions in in vivo skin. The aim of this study is to describe MNRF-induced micropores using RCM and OCT imaging. MATERIALS AND METHODS Five healthy participants were treated with a 7 × 7 array of 1500 μm microneedles on two adjacent areas of the right hip. One area received MNRF using high RF energy while the other underwent MNRF at low RF energy. Micropore morphology was evaluated qualitatively and quantitatively with RCM and OCT. To relate imaging with histology, one participant underwent punch biopsy in both areas. RESULTS Reflectance confocal microscopy visualized shape, content, and thermal-induced coagulation zone (CZ) of MNRF micropores. At high RF energy, micropores showed concentric shape, contained hyperreflective granules, and coagulated tissue from epidermis to dermo-epidermal junction (diameter 63-85 μm). Micropores at low RF energy, presented with a stellate shape, no content and CZs that were visible only in epidermis (CZ thickness 9 μm, IQR 8-21 μm). Evaluating OCT, high RF energy showed deeper (150 μm), more easily identifiable micropores compared to low RF energy micropores (70 μm). Histology showed tissue coagulation to a depth of 1500 μm at high RF energy, while at low RF energy, disruption was only visible in epidermis. CONCLUSION Microneedle fractional radiofrequency micropores show distinct characteristics in both RCM and OCT, depending on RF energy. These in vivo imaging modalities are complementary and allow combined, qualitative, and quantitative evaluation.
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Affiliation(s)
- Frederikke S Hansen
- Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Emily Wenande
- Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Merete Haedersdal
- Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Christine S K Fuchs
- Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
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Tsai MT, Huang BH, Yeh CC, Lei KF, Tsang NM. Non-Invasive Quantification of the Growth of Cancer Cell Colonies by a Portable Optical Coherence Tomography. MICROMACHINES 2019; 10:mi10010035. [PMID: 30621072 PMCID: PMC6356435 DOI: 10.3390/mi10010035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 12/28/2018] [Accepted: 01/02/2019] [Indexed: 12/15/2022]
Abstract
Investigation of tumor development is essential in cancer research. In the laboratory, living cell culture is a standard bio-technology for studying cellular response under tested conditions to predict in vivo cellular response. In particular, the colony formation assay has become a standard experiment for characterizing the tumor development in vitro. However, quantification of the growth of cell colonies under a microscope is difficult because they are suspended in a three-dimensional environment. Thus, optical coherence tomography (OCT) imaging was develop in this study to monitor the growth of cell colonies. Cancer cell line of Huh 7 was used and the cells were applied on a layer of agarose hydrogel, i.e., a non-adherent surface. Then, cell colonies were gradually formed on the surface. The OCT technique was used to scan the cell colonies every day to obtain quantitative data for describing their growth. The results revealed the average volume increased with time due to the formation of cell colonies day-by-day. Additionally, the distribution of cell colony volume was analyzed to show the detailed information of the growth of the cell colonies. In summary, the OCT provides a non-invasive quantification technique for monitoring the growth of the cell colonies. From the OCT images, objective and precise information is obtained for higher prediction of the in vivo tumor development.
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Affiliation(s)
- Meng-Tsan Tsai
- Department of Electrical Engineering, Chang Gung University, Taoyuan 33302, Taiwan.
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou 33305, Taiwan.
| | - Bo-Huei Huang
- Department of Electrical Engineering, Chang Gung University, Taoyuan 33302, Taiwan.
| | - Chun-Chih Yeh
- Graduate Institute of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan.
| | - Kin Fong Lei
- Graduate Institute of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan.
- Department of Radiation Oncology, Chang Gung Memorial Hospital, Linkou 33305, Taiwan.
| | - Ngan-Ming Tsang
- Department of Radiation Oncology, Chang Gung Memorial Hospital, Linkou 33305, Taiwan.
- Department of Traditional Chinese Medicine, Chang Gung University, Taoyuan 33302, Taiwan.
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Chen WJ, Chang YY, Shen SC, Tzeng YL, Lee HC, Yang CH, Tsai MT. In vivo detection of UV-induced acute skin effects using optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2018; 9:4235-4245. [PMID: 30615717 PMCID: PMC6157765 DOI: 10.1364/boe.9.004235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/13/2018] [Accepted: 08/02/2018] [Indexed: 05/16/2023]
Abstract
Ultraviolet (UV) rays have been identified as a carcinogen with long-term irradiation and are an important risk factor for skin cancer. Here, we report the use of optical coherence tomography/optical coherence tomography angiography (OCT/OCTA) to study acute UV-induced effects on skin in vivo. To understand the relationship between the acute effects and irradiated UV power density, three groups were irradiated with different power densities in our experiments. Furthermore, the same skin area was repeatedly scanned with OCT during UV irradiation to investigate the progress of the induced acute effects and after irradiation for observation of skin recovery. Subsequently, the OCT/OCTA results were quantitatively analyzed to acquire skin thickness and blood-vessel density for comparison. UV-induced acute effects on morphology and microcirculation can be identified from OCT/OCTA results, which showed the increases in the skin thickness and blood-vessel density and even severe damage types such as blisters. The results of quantitative analyses also illustrated that the severity of damage induced by UV irradiation can be distinguished and the skin recovery can be monitored with OCT. Our results indicate that OCT can be a promising tool for early detection of UV-induced acute skin damage.
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Affiliation(s)
- Wen-Ju Chen
- Department of Electrical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
- These authors equally contributed to this work
| | - Yao-Yu Chang
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou and Taipei, Taiwan
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- These authors equally contributed to this work
| | - Su-Chin Shen
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Taoyuan 33302, Taiwan
| | - Yua-Lan Tzeng
- Department of Electrical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Hsiang-Chieh Lee
- Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
- Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Chih-Hsun Yang
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou and Taipei, Taiwan
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Meng-Tsan Tsai
- Department of Electrical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou and Taipei, Taiwan
- Medical Imaging Research Center, Institute for Radiological Research, Chang Gung University and Chang Gung Memorial Hospital at Linkou, Taoyuan 33302, Taiwan
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12
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Li D, Lin SB, Cheng B. Complications and posttreatment care following invasive laser skin resurfacing: A review. J COSMET LASER THER 2017; 20:168-178. [DOI: 10.1080/14764172.2017.1400166] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Dan Li
- Department of Ophthalmology, Joint Shantou International Eye Center of Shantou University and Chinese University of Hong Kong, Shantou, Guangdong Province, China
- Department of Plastic Surgery, Southern Medical University, Tonghe, Guangzhou, China
| | - Shi-Bin Lin
- Department of Ophthalmology, Joint Shantou International Eye Center of Shantou University and Chinese University of Hong Kong, Shantou, Guangdong Province, China
| | - Biao Cheng
- Department of Plastic Surgery, Southern Medical University, Tonghe, Guangzhou, China
- Department of Plastic Surgery, General Hospital of Guangzhou Military Command of PLA, Guangzhou, China
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13
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Kirillin M, Motovilova T, Shakhova N. Optical coherence tomography in gynecology: a narrative review. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-9. [PMID: 29210220 DOI: 10.1117/1.jbo.22.12.121709] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 11/14/2017] [Indexed: 06/07/2023]
Abstract
Modern gynecologic practice requires noninvasive diagnostics techniques capable of detecting morphological and functional alterations in tissues of female reproductive organs. Optical coherence tomography (OCT) is a promising tool for providing imaging of biotissues with high resolution at depths up to 2 mm. Design of the customized probes provides wide opportunities for OCT use in gynecology. This paper contains a retrospective insight into the history of OCT employment in gynecology, an overview of the existing gynecologic OCT probes, including those for combination with other diagnostic modalities, and state-of-the-art application of OCT for diagnostics of tumor and nontumor pathologies of female genitalia. Perspectives of OCT both in diagnostics and treatment planning and monitoring in gynecology are overviewed.
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14
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Ahlström M, Gjerdrum L, Larsen H, Fuchs C, Sørensen A, Forman J, Ågren M, Mogensen M. Suction blister lesions and epithelialization monitored by optical coherence tomography. Skin Res Technol 2017; 24:65-72. [DOI: 10.1111/srt.12391] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/02/2017] [Indexed: 12/17/2022]
Affiliation(s)
- M.G. Ahlström
- Department of Dermatology and Copenhagen Wound Healing Center; Bispebjerg Hospital; University of Copenhagen; Copenhagen Denmark
| | - L.M.R. Gjerdrum
- Department of Pathology; Zealand University Hospital; Roskilde Denmark
| | - H.F. Larsen
- Department of Dermatology and Copenhagen Wound Healing Center; Bispebjerg Hospital; University of Copenhagen; Copenhagen Denmark
| | - C. Fuchs
- Department of Dermatology and Copenhagen Wound Healing Center; Bispebjerg Hospital; University of Copenhagen; Copenhagen Denmark
| | - A.L. Sørensen
- Section of Biostatistics; Department of Public Health; University of Copenhagen; Copenhagen Denmark
| | - J.L. Forman
- Section of Biostatistics; Department of Public Health; University of Copenhagen; Copenhagen Denmark
| | - M.S. Ågren
- Department of Dermatology and Copenhagen Wound Healing Center; Bispebjerg Hospital; University of Copenhagen; Copenhagen Denmark
- Digestive Disease Center; Bispebjerg Hospital; University of Copenhagen; Copenhagen Denmark
| | - M. Mogensen
- Department of Dermatology and Copenhagen Wound Healing Center; Bispebjerg Hospital; University of Copenhagen; Copenhagen Denmark
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15
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Pal P, Das B, Dadhich P, Achar A, Dhara S. Carbon nanodot impregnated fluorescent nanofibers for in vivo monitoring and accelerating full-thickness wound healing. J Mater Chem B 2017; 5:6645-6656. [PMID: 32264427 DOI: 10.1039/c7tb00684e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Semiconductor quantum dots are overwhelmingly used for in situ monitoring and imaging of cell-scaffold interactions. However, quantum dots suffer from oxidative biodegradation in biological systems, besides being toxic due to the presence of heavy metals. In this study, we report the development of an intrinsically fluorescent nanofibrous scaffold of polycaprolactone-gelatin for skin tissue regeneration and noninvasive monitoring of scaffold activity in vivo. The presence of the incorporated carbon nanodots played a critical role in imparting the scaffold with these novel characteristics. The developed scaffold was uniform and bead free with fiber diameter of 698 ± 420 nm and pore diameter of 2.93 ± 1.13 μm. Inclusion of carbon nanodots not only bestowed uniform fluorescence of the scaffold but also promoted fibroblast cell adhesion, migration and proliferation. Co-culture of fibroblast and keratinocyte cells on the scaffold surface also enabled the development of a stratified epithelial layer. The scaffold exhibited antioxidant properties by scavenging free radicals and reducing the expression of antioxidative enzymes. Upon implantation in a full-thickness excision wound, the scaffold accelerated the progression of healing and the regenerated skin exhibited a stratified epithelial layer with mature dermal tissue. The scaffold enabled noninvasive monitoring of the wound healing kinetics in vivo through two-photon microscopy. With excellent photoluminescence, biocompatibility, and photo stability, the scaffold can suitably be used for prolonged monitoring of cell-scaffold interactions and further efficiently reduce the oxidative stress during continuous imaging. Additionally, being synthesized from inexpensive precursors employing a simple procedure, carbon nanodot production is cost-effective and the developed scaffold would be an off-the-shelf, readily available economical product.
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Affiliation(s)
- Pallabi Pal
- Biomaterials & Tissue Engineering Laboratory, School of Medical Science and Technology, Indian Institute of Technology, Kharagpur-721302, India.
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16
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Olesen UH, Mogensen M, Haedersdal M. Vehicle type affects filling of fractional laser-ablated channels imaged by optical coherence tomography. Lasers Med Sci 2017; 32:679-684. [DOI: 10.1007/s10103-017-2168-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 02/03/2017] [Indexed: 10/20/2022]
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17
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Tsai MT, Tsai TY, Shen SC, Ng CY, Lee YJ, Lee JD, Yang CH. Evaluation of Laser-Assisted Trans-Nail Drug Delivery with Optical Coherence Tomography. SENSORS (BASEL, SWITZERLAND) 2016; 16:E2111. [PMID: 27973451 PMCID: PMC5191091 DOI: 10.3390/s16122111] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 12/05/2016] [Accepted: 12/07/2016] [Indexed: 01/08/2023]
Abstract
The nail provides a functional protection to the fingertips and surrounding tissue from external injuries. The nail plate consists of three layers including dorsal, intermediate, and ventral layers. The dorsal layer consists of compact, hard keratins, limiting topical drug delivery through the nail. In this study, we investigate the application of fractional CO₂ laser that produces arrays of microthermal ablation zones (MAZs) to facilitate drug delivery in the nails. We utilized optical coherence tomography (OCT) for real-time monitoring of the laser-skin tissue interaction, sparing the patient from an invasive surgical sampling procedure. The time-dependent OCT intensity variance was used to observe drug diffusion through an induced MAZ array. Subsequently, nails were treated with cream and liquid topical drugs to investigate the feasibility and diffusion efficacy of laser-assisted drug delivery. Our results show that fractional CO₂ laser improves the effectiveness of topical drug delivery in the nail plate and that OCT could potentially be used for in vivo monitoring of the depth of laser penetration as well as real-time observations of drug delivery.
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Affiliation(s)
- Meng-Tsan Tsai
- Department of Electrical Engineering, Chang Gung University, Taoyuan 33302, Taiwan.
- Medical Imaging Research Center, Institute for Radiological Research, Chang Gung University and Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, Taiwan.
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou 33305, Taiwan.
| | - Ting-Yen Tsai
- Department of Electrical Engineering, Chang Gung University, Taoyuan 33302, Taiwan.
| | - Su-Chin Shen
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou 33305, Taiwan.
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.
| | - Chau Yee Ng
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou 33305, Taiwan.
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.
| | - Ya-Ju Lee
- Institute of Electro-Optical Science and Technology, National Taiwan Normal University, Taipei 11677, Taiwan.
| | - Jiann-Der Lee
- Department of Electrical Engineering, Chang Gung University, Taoyuan 33302, Taiwan.
- Department of Neurosurgery, Chang Gung Memorial Hospital, LinKou 33305, Taiwan.
| | - Chih-Hsun Yang
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou 33305, Taiwan.
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.
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18
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Osawa K, Minemura H, Anzai Y, Tomita D, Shimanaka T, Suzuki T, Iida H, Matsuura N, Katagiri C, Yamashita T, Hara Y, Watanabe K. In vivo optical interferometric imaging of human skin utilizing monochromatic light source. APPLIED OPTICS 2016; 55:5052-5056. [PMID: 27409189 DOI: 10.1364/ao.55.005052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We have demonstrated tomographic imaging of in vivo human skin with an optical interferometric imaging technique using a monochromatic light source. The axial resolution of this method is determined by the center wavelength and the NA of the objective and is irrelevant to the bandwidth of the light source in contrast to optical coherence tomography. Our imaging system is constructed with low-priced and small-sized compact disk optical pickup components, a laser diode, a high NA objective, and a voice coil actuator. In spite of its low cost and small size, our imaging system can visualize the structure of human skin as clearly as a commercial reflectance confocal microscope.
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19
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Gong P, Es'haghian S, Harms KA, Murray A, Rea S, Kennedy BF, Wood FM, Sampson DD, McLaughlin RA. Optical coherence tomography for longitudinal monitoring of vasculature in scars treated with laser fractionation. JOURNAL OF BIOPHOTONICS 2016; 9:626-36. [PMID: 26260918 DOI: 10.1002/jbio.201500157] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 07/14/2015] [Accepted: 07/16/2015] [Indexed: 05/21/2023]
Abstract
This study presents the first in vivo longitudinal assessment of scar vasculature in ablative fractional laser treatment using optical coherence tomography (OCT). A method based on OCT speckle decorrelation was developed to visualize and quantify the scar vasculature over the treatment period. Through reliable co-location of the imaging field of view across multiple imaging sessions, and compensation for motion artifact, the study was able to track the same scar tissue over a period of several months, and quantify changes in the vasculature area density. The results show incidences of occlusion of individual vessels 3 days after the first treatment. The subsequent responses ˜20 weeks after the initial treatment show differences between immature and mature scars. Image analysis showed a distinct decrease (25 ± 13%, mean ± standard deviation) and increase (19 ± 5%) of vasculature area density for the immature and mature scars, respectively. This study establishes the feasibility of OCT imaging for quantitative longitudinal monitoring of vasculature in scar treatment. En face optical coherence tomography vasculature images pre-treatment (top) and ˜20 weeks after the first laser treatment (bottom) of a mature burn scar. Arrows mark the same vessel pattern.
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Affiliation(s)
- Peijun Gong
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley WA, 6009, Australia.
| | - Shaghayegh Es'haghian
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley WA, 6009, Australia
| | - Karl-Anton Harms
- Burns Service of Western Australia, Royal Perth Hospital, Wellington Street, Perth WA, 6000, Australia
| | - Alexandra Murray
- Burns Service of Western Australia, Royal Perth Hospital, Wellington Street, Perth WA, 6000, Australia
| | - Suzanne Rea
- Burns Service of Western Australia, Royal Perth Hospital, Wellington Street, Perth WA, 6000, Australia
- Burn Injury Research Unit, School of Surgery, The University of Western Australia, 35 Stirling Highway, Crawley WA, 6009, Australia
| | - Brendan F Kennedy
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley WA, 6009, Australia
| | - Fiona M Wood
- Burns Service of Western Australia, Royal Perth Hospital, Wellington Street, Perth WA, 6000, Australia
- Burn Injury Research Unit, School of Surgery, The University of Western Australia, 35 Stirling Highway, Crawley WA, 6009, Australia
| | - David D Sampson
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley WA, 6009, Australia
- Centre for Microscopy, Characterisation & Analysis, The University of Western Australia, 35 Stirling Highway, Crawley WA, 6009, Australia
| | - Robert A McLaughlin
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley WA, 6009, Australia
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20
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Ahn Y, Lee CY, Baek S, Kim T, Kim P, Lee S, Min D, Lee H, Kim J, Jung W. Quantitative monitoring of laser-treated engineered skin using optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2016; 7:1030-41. [PMID: 27231605 PMCID: PMC4866446 DOI: 10.1364/boe.7.001030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/09/2016] [Accepted: 02/10/2016] [Indexed: 05/27/2023]
Abstract
Nowadays, laser therapy is a common method for treating various dermatological troubles such as acne and wrinkles because of its efficient and immediate skin enhancement. Although laser treatment has become a routine procedure in medical and cosmetic fields, the prevention of side-effects, such as hyperpigmentation, redness and burning, still remains a critical issue that needs to be addressed. In order to reduce the side-effects while attaining efficient therapeutic outcomes, it is essential to understand the light-skin interaction through evaluation of physiological changes before and after laser therapy. In this study, we introduce a quantitative tissue monitoring method based on optical coherence tomography (OCT) for the evaluation of tissue regeneration after laser irradiation. To create a skin injury model, we applied a fractional CO2 laser on a customized engineered skin model, which is analogous to human skin in terms of its basic biological function and morphology. The irradiated region in the skin was then imaged by a high-speed OCT system, and its morphologic changes were analyzed by automatic segmentation software. Volumetric OCT images in the laser treated area clearly visualized the wound healing progress at different time points and provided comprehensive information which cannot be acquired through conventional monitoring methods. The results showed that the laser wound in engineered skins was mostly recovered from within 1~2 days with a fast recovery time in the vertical direction. However, the entire recovery period varied widely depending on laser doses and skin type. Our results also indicated that OCT-guided laser therapy would be a very promising protocol for optimizing laser treatment for skin therapy.
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Affiliation(s)
- Yujin Ahn
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Chan-Young Lee
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Songyee Baek
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Taeho Kim
- FuturIST Co., Ltd., Ulsan, 44610, South Korea
| | - Pilun Kim
- Oz-Tec Co., Ltd., Daegu, 41566, South Korea
| | - Sunghoon Lee
- Amorepacific R&D center, Yongin, 17074, South Korea
| | - Daejin Min
- Amorepacific R&D center, Yongin, 17074, South Korea
| | - Haekwang Lee
- Amorepacific R&D center, Yongin, 17074, South Korea
| | - Jeehyun Kim
- School of Electronics Engineering, Kyungpook National University, Daegu, 41566, South Korea
| | - Woonggyu Jung
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
- Center of Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, South Korea
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21
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Argyraki A, Clemmensen LKH, Petersen PM. Does correlated color temperature affect the ability of humans to identify veins? JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2016; 33:141-148. [PMID: 26831595 DOI: 10.1364/josaa.33.000141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In the present study we provide empirical evidence and demonstrate statistically that white illumination settings can affect the human ability to identify veins in the inner hand vasculature. A special light-emitting diode lamp with high color rendering index (CRI 84-95) was developed and the effect of correlated color temperature was evaluated, in the range between 2600 and 5700 K at an illuminance of 40±9 lx on the ability of adult humans to identify veins. It is shown that the ability to identify veins can, on average, be increased up to 24% when white illumination settings that do not resemble incandescent light are applied. The illuminance reported together with the effect of white illumination settings on direct visual perception of biosamples are relevant for clinical investigations during the night.
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22
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Optical coherence tomography-guided laser microsurgery for blood coagulation with continuous-wave laser diode. Sci Rep 2015; 5:16739. [PMID: 26568136 PMCID: PMC4645164 DOI: 10.1038/srep16739] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 10/19/2015] [Indexed: 12/18/2022] Open
Abstract
Blood coagulation is the clotting and subsequent dissolution of the clot following repair to the damaged tissue. However, inducing blood coagulation is difficult for some patients with homeostasis dysfunction or during surgery. In this study, we proposed a method to develop an integrated system that combines optical coherence tomography (OCT) and laser microsurgery for blood coagulation. Also, an algorithm for positioning of the treatment location from OCT images was developed. With OCT scanning, 2D/3D OCT images and angiography of tissue can be obtained simultaneously, enabling to noninvasively reconstruct the morphological and microvascular structures for real-time monitoring of changes in biological tissues during laser microsurgery. Instead of high-cost pulsed lasers, continuous-wave laser diodes (CW-LDs) with the central wavelengths of 450 nm and 532 nm are used for blood coagulation, corresponding to higher absorption coefficients of oxyhemoglobin and deoxyhemoglobin. Experimental results showed that the location of laser exposure can be accurately controlled with the proposed approach of imaging-based feedback positioning. Moreover, blood coagulation can be efficiently induced by CW-LDs and the coagulation process can be monitored in real-time with OCT. This technology enables to potentially provide accurate positioning for laser microsurgery and control the laser exposure to avoid extra damage by real-time OCT imaging.
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23
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Banzhaf CA, Wind BS, Mogensen M, Meesters AA, Paasch U, Wolkerstorfer A, Haedersdal M. Spatiotemporal closure of fractional laser-ablated channels imaged by optical coherence tomography and reflectance confocal microscopy. Lasers Surg Med 2015; 48:157-65. [DOI: 10.1002/lsm.22386] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2015] [Indexed: 01/05/2023]
Affiliation(s)
- Christina A. Banzhaf
- Department of Dermatology; Bispebjerg Hospital, University of Copenhagen; Copenhagen Denmark
| | - Bas S. Wind
- Department of Dermatology; Academic Medical Centre, University of Amsterdam; Amsterdam the Netherlands
| | - Mette Mogensen
- Department of Dermatology; Bispebjerg Hospital, University of Copenhagen; Copenhagen Denmark
| | - Arne A. Meesters
- Department of Dermatology; Academic Medical Centre, University of Amsterdam; Amsterdam the Netherlands
| | - Uwe Paasch
- Department of Dermatology, Venereology and Allergology; University of Leipzig; Leipzig Germany
| | - Albert Wolkerstorfer
- Department of Dermatology; Academic Medical Centre, University of Amsterdam; Amsterdam the Netherlands
| | - Merete Haedersdal
- Department of Dermatology; Bispebjerg Hospital, University of Copenhagen; Copenhagen Denmark
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24
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Fractional CO2 Laser Is an Effective Therapeutic Modality for Xanthelasma Palpebrarum. Dermatol Surg 2014; 40:1349-55. [DOI: 10.1097/dss.0000000000000172] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Yang CH, Tsai MT, Shen SC, Ng CY, Jung SM. Feasibility of ablative fractional laser-assisted drug delivery with optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2014; 5:3949-59. [PMID: 25426321 PMCID: PMC4242029 DOI: 10.1364/boe.5.003949] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 10/07/2014] [Accepted: 10/11/2014] [Indexed: 05/20/2023]
Abstract
Fractional resurfacing creates hundreds of microscopic wounds in the skin without injuring surrounding tissue. This technique allows rapid wound healing owing to small injury regions, and has been proven as an effective method for repairing photodamaged skin. Recently, ablative fractional laser (AFL) treatment has been demonstrated to facilitate topical drug delivery into skin. However, induced fractional photothermolysis depends on several parameters, such as incident angle, exposure energy, and spot size of the fractional laser. In this study, we used fractional CO2 laser to induce microscopic ablation array on the nail for facilitating drug delivery through the nail. To ensure proper energy delivery without damaging tissue structures beneath the nail plate, optical coherence tomography (OCT) was implemented for quantitative evaluation of induced microscopic ablation zone (MAZ). Moreover, to further study the feasibility of drug delivery, normal saline was dripped on the exposure area of fingernail and the speckle variance in OCT signal was used to observe water diffusion through the ablative channels into the nail plate. In conclusion, this study establishes OCT as an effective tool for the investigation of fractional photothermolysis and water/drug delivery through microscopic ablation channels after nail fractional laser treatment.
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Affiliation(s)
- Chih-Hsun Yang
- Department of Dermatology, Chang Gung Memorial Hospital, 5 Fusing St., Kwei-Shan, Tao- Yuan, 33302,
Taiwan
- College of Medicine, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302
Taiwan
| | - Meng-Tsan Tsai
- Department of Electrical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302
Taiwan
- Graduate Institute of Electro-Optical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302
Taiwan
| | - Su-Chin Shen
- College of Medicine, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302
Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, 5 Fusing St. Kwei-Shan, Tao- Yuan, 33302
Taiwan
| | - Chau Yee Ng
- Department of Dermatology, Chang Gung Memorial Hospital, 5 Fusing St., Kwei-Shan, Tao- Yuan, 33302,
Taiwan
- College of Medicine, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302
Taiwan
| | - Shih-Ming Jung
- College of Medicine, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302
Taiwan
- Department of Pathology, Chang Gung Memorial Hospital, 5 Fusing St., Kwei-Shan, Tao- Yuan, 33302
Taiwan
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26
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Tsai MT, Chang FY, Lee CK, Gong CSA, Lin YX, Lee JD, Yang CH, Liu HL. Investigation of temporal vascular effects induced by focused ultrasound treatment with speckle-variance optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2014; 5:2009-2022. [PMID: 25071945 PMCID: PMC4102345 DOI: 10.1364/boe.5.002009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 05/28/2014] [Accepted: 05/28/2014] [Indexed: 05/30/2023]
Abstract
Focused ultrasound (FUS) can be used to locally and temporally enhance vascular permeability, improving the efficiency of drug delivery from the blood vessels into the surrounding tissue. However, it is difficult to evaluate in real time the effect induced by FUS and to noninvasively observe the permeability enhancement. In this study, speckle-variance optical coherence tomography (SVOCT) was implemented for the investigation of temporal effects on vessels induced by FUS treatment. With OCT scanning, the dynamic change in vessels during FUS exposure can be observed and studied. Moreover, the vascular effects induced by FUS treatment with and without the presence of microbubbles were investigated and quantitatively compared. Additionally, 2D and 3D speckle-variance images were used for quantitative observation of blood leakage from vessels due to the permeability enhancement caused by FUS, which could be an indicator that can be used to determine the influence of FUS power exposure. In conclusion, SVOCT can be a useful tool for monitoring FUS treatment in real time, facilitating the dynamic observation of temporal effects and helping to determine the optimal FUS power.
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Affiliation(s)
- Meng-Tsan Tsai
- Department of Electrical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302 Taiwan
- Graduate Institute of Electro-Optical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302 Taiwan
| | - Feng-Yu Chang
- Department of Electrical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302 Taiwan
| | - Cheng-Kuang Lee
- Department of Electrical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302 Taiwan
| | - Cihun-Siyong Alex Gong
- Department of Electrical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302 Taiwan
| | - Yu-Xiang Lin
- Department of Electrical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302 Taiwan
| | - Jiann-Der Lee
- Department of Electrical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302 Taiwan
| | - Chih-Hsun Yang
- Department of Dermatology, Chang Gung Memorial Hospital, 5 Fusing Street, Kwei-Shan, Tao-Yaun 33302, Taiwan
| | - Hao-Li Liu
- Department of Electrical Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 33302 Taiwan
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