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Fan Y, Liu S, Gao E, Guo R, Dong G, Li Y, Gao T, Tang X, Liao H. The LMIT: Light-mediated minimally-invasive theranostics in oncology. Theranostics 2024; 14:341-362. [PMID: 38164160 PMCID: PMC10750201 DOI: 10.7150/thno.87783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 10/18/2023] [Indexed: 01/03/2024] Open
Abstract
Minimally-invasive diagnosis and therapy have gradually become the trend and research hotspot of current medical applications. The integration of intraoperative diagnosis and treatment is a development important direction for real-time detection, minimally-invasive diagnosis and therapy to reduce mortality and improve the quality of life of patients, so called minimally-invasive theranostics (MIT). Light is an important theranostic tool for the treatment of cancerous tissues. Light-mediated minimally-invasive theranostics (LMIT) is a novel evolutionary technology that integrates diagnosis and therapeutics for the less invasive treatment of diseased tissues. Intelligent theranostics would promote precision surgery based on the optical characterization of cancerous tissues. Furthermore, MIT also requires the assistance of smart medical devices or robots. And, optical multimodality lay a solid foundation for intelligent MIT. In this review, we summarize the important state-of-the-arts of optical MIT or LMIT in oncology. Multimodal optical image-guided intelligent treatment is another focus. Intraoperative imaging and real-time analysis-guided optical treatment are also systemically discussed. Finally, the potential challenges and future perspectives of intelligent optical MIT are discussed.
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Affiliation(s)
- Yingwei Fan
- School of Medical Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Shuai Liu
- School of Medical Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Enze Gao
- School of Medical Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Rui Guo
- School of Medical Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Guozhao Dong
- School of Medical Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Yangxi Li
- Dept. of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, 100084
| | - Tianxin Gao
- School of Medical Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Xiaoying Tang
- School of Medical Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Hongen Liao
- Dept. of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, 100084
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Otuya DO, Dechene NM, Poshtupaka D, Judson S, Carlson CJ, Zemlok SK, Sevieri E, Choy P, Shore RE, De León‐Peralta E, Cirio AA, Rihm TW, Krall AA, Gavgiotaki E, Dong J, Silva SL, Baillargeon A, Baldwin G, Gao AH, Jansa Z, Barrios A, Ryan E, Bhat NGM, Balmasheva I, Chung A, Grant CN, Bablouzian AL, Beatty M, Ahsen OO, Zheng H, Tearney GJ. Passively scanned, single-fiber optical coherence tomography probes for gastrointestinal devices. Lasers Surg Med 2022; 54:935-944. [PMID: 35708124 PMCID: PMC9541095 DOI: 10.1002/lsm.23576] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/31/2022] [Accepted: 06/03/2022] [Indexed: 10/25/2022]
Abstract
BACKGROUND/OBJECTIVES Optical coherence tomography (OCT) uses low coherence interferometry to obtain depth-resolved tissue reflectivity profiles (M-mode) and transverse beam scanning to create images of two-dimensional tissue morphology (B-mode). Endoscopic OCT imaging probes typically employ proximal or distal mechanical beam scanning mechanisms that increase cost, complexity, and size. Here, we demonstrate in the gastrointestinal (GI) tracts of unsedated human patients, that a passive, single-fiber probe can be used to guide device placement, conduct device-tissue physical contact sensing, and obtain two-dimensional OCT images via M-to-B-mode conversion. MATERIALS AND METHODS We designed and developed ultrasmall, manually scannable, side- and forward-viewing single fiber-optic probes that can capture M-mode OCT data. Side-viewing M-mode OCT probes were incorporated into brush biopsy devices designed to harvest the microbiome and forward-viewing M-mode OCT probes were integrated into devices that measure intestinal potential difference (IPD). The M-mode OCT probe-coupled devices were utilized in the GI tract in six unsedated patients in vivo. M-mode data were converted into B-mode images using an M-to-B-mode conversion algorithm. The effectiveness of physical contact sensing by the M-mode OCT probes was assessed by comparing the variances of the IPD values when the probe was in physical contact with the tissue versus when it was not. The capacity of forward- and side-viewing M-mode OCT probes to produce high-quality B-mode images was compared by computing the percentages of the M-to-B-mode images that showed close contact between the probe and the luminal surface. Passively scanned M-to-B-mode images were qualitatively compared to B-mode images obtained by mechanical scanning OCT tethered capsule endomicroscopy (TCE) imaging devices. RESULTS The incorporation of M-mode OCT probes in these nonendoscopic GI devices safely and effectively enabled M-mode OCT imaging, facilitating real-time device placement guidance and contact sensing in vivo. Results showed that M-mode OCT contact sensing improved the variance of IPD measurements threefold and side-viewing probes increased M-to-B-mode image visibility by 10%. Images of the esophagus, stomach, and duodenum generated by the passively scanned probes and M-to-B-mode conversion were qualitatively superior to B-mode images obtained by mechanically scanning OCT TCE devices. CONCLUSION These results show that passive, single optical fiber OCT probes can be effectively utilized for nonendoscopic device placement guidance, device contact sensing, and two-dimensional morphologic imaging in the human GI tract in vivo. Due to their small size, lower cost, and reduced complexity, these M-mode OCT probes may provide an easier avenue for the incorporation of OCT functionality into endoscopic/nonendoscopic devices.
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Lerner DG, Mencin A, Novak I, Huang C, Ng K, Lirio RA, Khlevner J, Utterson EC, Harris BR, Pitman RT, Mir S, Gugig R, Walsh CM, Fishman D. Advances in Pediatric Diagnostic Endoscopy: A State-of-the-Art Review. JPGN REPORTS 2022; 3:e224. [PMID: 37168622 PMCID: PMC10158303 DOI: 10.1097/pg9.0000000000000224] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 04/20/2022] [Indexed: 05/13/2023]
Abstract
Pediatric endoscopy has revolutionized the way we diagnose and treat gastrointestinal disorders in children. Technological advances in computer processing and imaging continue to affect endoscopic equipment and advance diagnostic tools for pediatric endoscopy. Although commonly used by adult gastroenterologists, modalities, such as endomicroscopy, image-enhanced endoscopy, and impedance planimetry, are not routinely used in pediatric gastroenterology. This state-of-the-art review describes advances in diagnostic modalities, including image-enhanced endoscopy, confocal laser endomicroscopy, optical coherence tomography, endo functional luminal imaging probes, wireless motility/pH capsule, wireless colon capsule endoscopy, endoscopic ultrasound, and discusses the basic principles of each technology, including adult indications and pediatric applications, safety cost, and training data.
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Affiliation(s)
- Diana G. Lerner
- From the Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition, Medical College of Wisconsin, Milwaukee, WI
| | - Ali Mencin
- Division of Pediatric Gastroenterology, Columbia University Vagelos College of Physicians and Surgeons, New York, NY
| | - Inna Novak
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition, Children’s Hospital at Montefiore, Bronx, NY
| | - Clifton Huang
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition, Cook Children’s Medical Center, Fort Worth, TX
| | - Kenneth Ng
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Richard A. Lirio
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition, UMASS Memorial Children’s Medical Center/UMASS Medical School, Worcester, MA
| | - Julie Khlevner
- Division of Pediatric Gastroenterology, Columbia University Vagelos College of Physicians and Surgeons, New York, NY
| | - Elizabeth C. Utterson
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition, Washington University School of Medicine, St. Louis Children’s Hospital, St. Louis, MO
| | - Brendan R. Harris
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition, Washington University School of Medicine, St. Louis Children’s Hospital, St. Louis, MO
| | - Ryan T. Pitman
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition, Washington University School of Medicine, St. Louis Children’s Hospital, St. Louis, MO
| | - Sabina Mir
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition, UNC School of Medicine, Chapel Hill, NC
| | - Roberto Gugig
- Lucile Packard Children’s Hospital at Stanford, Palo Alto, CA
| | - Catharine M. Walsh
- Department of Paediatrics and the Wilson Centre, Division of Gastroenterology, Hepatology and Nutrition and the Research and Learning Institutes, Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Doug Fishman
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine, Houston, TX
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Zhang R, Fan Y, Qi W, Wang A, Tang X, Gao T. Current research and future prospects of IVOCT imaging-based detection of the vascular lumen and vulnerable plaque. JOURNAL OF BIOPHOTONICS 2022; 15:e202100376. [PMID: 35139263 DOI: 10.1002/jbio.202100376] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/17/2022] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
Intravascular optical coherence tomography (IVOCT) is an imaging method that has developed rapidly in recent years and is useful in coronary atherosclerosis diagnosis. It is widely used in the assessment of vulnerable plaque. This review summarizes the main research methods used in recent years for blood vessel lumen boundary detection and segmentation and vulnerable plaque segmentation and classification. This article aims to comprehensively and systematically introduce the research progress on internal tissues of blood vessels based on IVOCT images. The characteristics and advantages of various methods have been summarized to provide theoretical ideas and methods for the reference of relevant researchers and scholars.
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Affiliation(s)
- Ruolin Zhang
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Yingwei Fan
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
| | - Wenliu Qi
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Ancong Wang
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Xiaoying Tang
- School of Life Science, Beijing Institute of Technology, Beijing, China
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
| | - Tianxin Gao
- School of Life Science, Beijing Institute of Technology, Beijing, China
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Abstract
Photoacoustic (PA) imaging is able to provide extremely high molecular
contrast while maintaining the superior imaging depth of ultrasound (US)
imaging. Conventional microscopic PA imaging has limited access to deeper tissue
due to strong light scattering and attenuation. Endoscopic PA technology enables
direct delivery of excitation light into the interior of a hollow organ or
cavity of the body for functional and molecular PA imaging of target tissue.
Various endoscopic PA probes have been developed for different applications,
including the intravascular imaging of lipids in atherosclerotic plaque and
endoscopic imaging of colon cancer. In this paper, the authors review
representative probe configurations and corresponding preclinical applications.
In addition, the potential challenges and future directions of endoscopic PA
imaging are discussed.
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Affiliation(s)
- Yan Li
- Beckman Laser Institute, University of California Irvine,
Irvine, CA 92617, USA
| | - Gengxi Lu
- Roski Eye Institute, Keck School of Medicine, University of
Southern California, Los Angeles, CA 90033, USA
| | - Qifa Zhou
- Roski Eye Institute, Keck School of Medicine, University of
Southern California, Los Angeles, CA 90033, USA
| | - Zhongping Chen
- Beckman Laser Institute, University of California Irvine,
Irvine, CA 92617, USA
- The Edwards Lifesciences Center for Cardiovascular
Technology, University of California Irvine, Irvine, CA 92617, USA
- Department of Biomedical Engineering, University of
California Irvine, Irvine, CA 92697, USA
- Correspondence:
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Noothalapati H, Iwasaki K, Yamamoto T. Non-invasive diagnosis of colorectal cancer by Raman spectroscopy: Recent developments in liquid biopsy and endoscopy approaches. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 258:119818. [PMID: 33957445 DOI: 10.1016/j.saa.2021.119818] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/31/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
Colorectal cancer (CRC) is the third most common cancer diagnosed globally and is also one of the leading causes of cancer deaths in both men and women. The progression of CRC is slow and is often contained in colon but the risk increases with age. Based on the high certainty that the net benefit of screening in an age group is substantial, screening for CRC is recommended beginning at the age of 50. Currently, most of the incidence is concentrated in developed countries but the rate is increasing rapidly in developing geographies. Detecting CRC at an early stage is critical to reduce morbidity and mortality. Colonoscopy is the most preferred screening method but not very widely implemented due to practical considerations such as cost involved, lack of personnel and facility. To address these concerns, Raman spectroscopy (RS) has been suggested as a viable alternative due to its potential as a rapid non-invasive diagnostic tool. Recently, several studies have been reported but many variations of RS applications in CRC exists and are not well understood by non-specialists. This review focuses particularly on developments of Raman based liquid biopsy and endoscopic studies in order to throw light on each of their significance and limitations. Necessary developments in the future to translate RS into a clinical tool for screening and diagnosis of CRC are also briefly presented.
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Affiliation(s)
- Hemanth Noothalapati
- Raman Project Center for Medical and Biological Applications, Shimane University, Matsue, Japan; Research Administration Office, Shimane University, Matsue, Japan; Faculty of Life and Environmental Sciences, Shimane University, Matsue, Japan.
| | - Keita Iwasaki
- The United Graduate School of Agricultural Sciences, Tottori University, Tottori, Japan
| | - Tatsuyuki Yamamoto
- Raman Project Center for Medical and Biological Applications, Shimane University, Matsue, Japan; Faculty of Life and Environmental Sciences, Shimane University, Matsue, Japan.
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Optimization of X-ray Investigations in Dentistry Using Optical Coherence Tomography. SENSORS 2021; 21:s21134554. [PMID: 34283107 PMCID: PMC8271642 DOI: 10.3390/s21134554] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/30/2021] [Accepted: 07/01/2021] [Indexed: 12/16/2022]
Abstract
The most common imaging technique for dental diagnoses and treatment monitoring is X-ray imaging, which evolved from the first intraoral radiographs to high-quality three-dimensional (3D) Cone Beam Computed Tomography (CBCT). Other imaging techniques have shown potential, such as Optical Coherence Tomography (OCT). We have recently reported on the boundaries of these two types of techniques, regarding. the dental fields where each one is more appropriate or where they should be both used. The aim of the present study is to explore the unique capabilities of the OCT technique to optimize X-ray units imaging (i.e., in terms of image resolution, radiation dose, or contrast). Two types of commercially available and widely used X-ray units are considered. To adjust their parameters, a protocol is developed to employ OCT images of dental conditions that are documented on high (i.e., less than 10 μm) resolution OCT images (both B-scans/cross sections and 3D reconstructions) but are hardly identified on the 200 to 75 μm resolution panoramic or CBCT radiographs. The optimized calibration of the X-ray unit includes choosing appropriate values for the anode voltage and current intensity of the X-ray tube, as well as the patient’s positioning, in order to reach the highest possible X-rays resolution at a radiation dose that is safe for the patient. The optimization protocol is developed in vitro on OCT images of extracted teeth and is further applied in vivo for each type of dental investigation. Optimized radiographic results are compared with un-optimized previously performed radiographs. Also, we show that OCT can permit a rigorous comparison between two (types of) X-ray units. In conclusion, high-quality dental images are possible using low radiation doses if an optimized protocol, developed using OCT, is applied for each type of dental investigation. Also, there are situations when the X-ray technology has drawbacks for dental diagnosis or treatment assessment. In such situations, OCT proves capable to provide qualitative images.
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Liu C, Yang Y, Qiu W, Chen Y, Dai J, Sun L. Quantitative characterization of the colorectal cancer in a rabbit model using high-frequency endoscopic ultrasound. ULTRASONICS 2021; 110:106289. [PMID: 33130363 DOI: 10.1016/j.ultras.2020.106289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 10/06/2020] [Accepted: 10/20/2020] [Indexed: 06/11/2023]
Abstract
PURPOSE Colonoscopy accompanied with biopsy works as the routine endoscopic strategy for the diagnosis of colorectal cancer (CRC) in clinic; however, the colonoscopy is limited to the tissue surface. During the last decades, enabling technologies are emerging to complement with the colonoscopy for better administration of CRC. The conventional low-frequency (<12 MHz) endoscopic ultrasound (EUS) guided fine-needle aspiration (FNA) has been widely used to assess the lesion penetration. With the high-frequency ultrasound transducer (>20 MHz), EUS allows more precise visualization of the colorectal abnormalities. In order to achieve the accurate detection or in situ characterization of the colorectal lesions, the EUS diagnosis needs more patho-physiological related information in the micro-structural or molecular level. Quantitative ultrasound (QUS) technique, which could extract the micro-structural information from the ultrasound radio-frequency (RF) signal, is promising for the non-invasive tissue characterization. To date, the knowledge of the high-frequency endoscopic QUS for the CRC characterization has not been fully determined. METHODS In this work, to our best knowledge, it is the first application of the QUS technique based on a customized high-frequency EUS system (30.5 MHz center frequency) to characterize the colorectal malignancies in a VX2 rabbit CRC model. To eliminate the response from the ultrasound electronic system and transducer, the ultrasound signals from colon tissue were calibrated. And, the resulting quasi-liner ultrasound spectra were fit by the linear regression test. As a result, three spectral parameters, including the slope (k), intercept (I) and Midband Fit (M), were obtained from the best-fit line. The three spectral parameters were compared between the malignant tissue regions and adjacent normal tissue regions of the colon tissue specimen ex vivo. The independent t-test was conducted between the three parameters from the normal and malignant group. The statistical method of Fisher Linear Discriminant (FLD) was used to explore the linear combinations of the three parameters, so as to provide more tissue micro-structural features than the single parameter alone. The three FLD values were derived from three different combinations among k, I and M. The threshold was selected from the statistical analysis to optimize the differentiation criteria between the malignant and the normal tissues. The color-coded images were used to display the local FLD values and combined with the EUS B-mode image. RESULTS AND CONCLUSIONS The mean Midband Fit (M) and intercept (I) showed significant differences between the malignant and normal tissue regions. The statistical analysis showed that there were significant differences in all the mean FLD values of the spectral parameter combinations (kI, kM and IM) (t test, P < 0.05). And, the combined image result from the B-mode image and color-coded image could visually correlate with the histology result. In conclusion, the high-frequency endoscopic QUS technique was potential to be used as a complementary method to distinguish the colorectal malignancies by leveraging its morphological and micro-structural ultrasound information.
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Affiliation(s)
- Cheng Liu
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region
| | - Yaoheng Yang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region
| | - Weibao Qiu
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China
| | - Yan Chen
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region
| | - Jiyan Dai
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region
| | - Lei Sun
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region.
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Micko A, Placzek F, Fonollà R, Winklehner M, Sentosa R, Krause A, Vila G, Höftberger R, Andreana M, Drexler W, Leitgeb RA, Unterhuber A, Wolfsberger S. Diagnosis of Pituitary Adenoma Biopsies by Ultrahigh Resolution Optical Coherence Tomography Using Neuronal Networks. Front Endocrinol (Lausanne) 2021; 12:730100. [PMID: 34733239 PMCID: PMC8560084 DOI: 10.3389/fendo.2021.730100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 09/29/2021] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE Despite advancements of intraoperative visualization, the difficulty to visually distinguish adenoma from adjacent pituitary gland due to textural similarities may lead to incomplete adenoma resection or impairment of pituitary function. The aim of this study was to investigate optical coherence tomography (OCT) imaging in combination with a convolutional neural network (CNN) for objectively identify pituitary adenoma tissue in an ex vivo setting. METHODS A prospective study was conducted to train and test a CNN algorithm to identify pituitary adenoma tissue in OCT images of adenoma and adjacent pituitary gland samples. From each sample, 500 slices of adjacent cross-sectional OCT images were used for CNN classification. RESULTS OCT data acquisition was feasible in 19/20 (95%) patients. The 16.000 OCT slices of 16/19 of cases were employed for creating a trained CNN algorithm (70% for training, 15% for validating the classifier). Thereafter, the classifier was tested on the paired samples of three patients (3.000 slices). The CNN correctly predicted adenoma in the 3 adenoma samples (98%, 100% and 84% respectively), and correctly predicted gland and transition zone in the 3 samples from the adjacent pituitary gland. CONCLUSION Trained convolutional neural network computing has the potential for fast and objective identification of pituitary adenoma tissue in OCT images with high sensitivity ex vivo. However, further investigation with larger number of samples is required.
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Affiliation(s)
- Alexander Micko
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Fabian Placzek
- Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria
| | - Roger Fonollà
- Department of Electrical Engineering, Video Coding and Architectures, Eindhoven University of Technology, Eindhoven, Netherlands
| | - Michael Winklehner
- Division of Neuropathology and Neurochemistry, Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Ryan Sentosa
- Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria
| | - Arno Krause
- Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria
| | - Greisa Vila
- Division of Endocrinology and Metabolism of the Department of Internal Medicine III, Vienna, Austria
| | - Romana Höftberger
- Division of Neuropathology and Neurochemistry, Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Marco Andreana
- Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria
| | - Wolfgang Drexler
- Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria
| | - Rainer A. Leitgeb
- Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory Innovative Optical Imaging and its Translation for “Innovative Optical Imaging and its Translation into Medicine” (OPTRAMED), Medical University of Vienna, Vienna, Austria
| | - Angelika Unterhuber
- Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria
| | - Stefan Wolfsberger
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
- *Correspondence: Stefan Wolfsberger,
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Peñate Medina T, Kolb JP, Hüttmann G, Huber R, Peñate Medina O, Ha L, Ulloa P, Larsen N, Ferrari A, Rafecas M, Ellrichmann M, Pravdivtseva MS, Anikeeva M, Humbert J, Both M, Hundt JE, Hövener JB. Imaging Inflammation - From Whole Body Imaging to Cellular Resolution. Front Immunol 2021; 12:692222. [PMID: 34248987 PMCID: PMC8264453 DOI: 10.3389/fimmu.2021.692222] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 05/12/2021] [Indexed: 01/31/2023] Open
Abstract
Imaging techniques have evolved impressively lately, allowing whole new concepts like multimodal imaging, personal medicine, theranostic therapies, and molecular imaging to increase general awareness of possiblities of imaging to medicine field. Here, we have collected the selected (3D) imaging modalities and evaluated the recent findings on preclinical and clinical inflammation imaging. The focus has been on the feasibility of imaging to aid in inflammation precision medicine, and the key challenges and opportunities of the imaging modalities are presented. Some examples of the current usage in clinics/close to clinics have been brought out as an example. This review evaluates the future prospects of the imaging technologies for clinical applications in precision medicine from the pre-clinical development point of view.
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Affiliation(s)
- Tuula Peñate Medina
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- *Correspondence: Tuula Peñate Medina, ; Jan-Bernd Hövener,
| | - Jan Philip Kolb
- Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany
| | - Gereon Hüttmann
- Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany
- Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Gießen, Germany
| | - Robert Huber
- Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany
| | - Oula Peñate Medina
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- Institute for Experimental Cancer Research (IET), University of Kiel, Kiel, Germany
| | - Linh Ha
- Department of Dermatology, Allergology and Venereology, University Hospital Schleswig-Holstein Lübeck (UKSH), Lübeck, Germany
| | - Patricia Ulloa
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Naomi Larsen
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Arianna Ferrari
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
| | - Magdalena Rafecas
- Institute of Medical Engineering (IMT), University of Lübeck, Lübeck, Germany
| | - Mark Ellrichmann
- Interdisciplinary Endoscopy, Medical Department1, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Mariya S. Pravdivtseva
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Mariia Anikeeva
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
| | - Jana Humbert
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Marcus Both
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Jennifer E. Hundt
- Lübeck Institute for Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Jan-Bernd Hövener
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- *Correspondence: Tuula Peñate Medina, ; Jan-Bernd Hövener,
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Zeng Y, Xu S, Chapman WC, Li S, Alipour Z, Abdelal H, Chatterjee D, Mutch M, Zhu Q. Real-time colorectal cancer diagnosis using PR-OCT with deep learning. Theranostics 2020; 10:2587-2596. [PMID: 32194821 PMCID: PMC7052898 DOI: 10.7150/thno.40099] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 11/08/2019] [Indexed: 12/24/2022] Open
Abstract
Prior reports have shown optical coherence tomography (OCT) can differentiate normal colonic mucosa from neoplasia, potentially offering an alternative technique to endoscopic biopsy - the current gold-standard colorectal cancer screening and surveillance modality. To help clinical translation limited by processing the large volume of generated data, we designed a deep learning-based pattern recognition (PR) OCT system that automates image processing and provides accurate diagnosis potentially in real-time. Method: OCT is an emerging imaging technique to obtain 3-dimensional (3D) "optical biopsies" of biological samples with high resolution. We designed a convolutional neural network to capture the structure patterns in human colon OCT images. The network is trained and tested using around 26,000 OCT images acquired from 20 tumor areas, 16 benign areas, and 6 other abnormal areas. Results: The trained network successfully detected patterns that identify normal and neoplastic colorectal tissue. Experimental diagnoses predicted by the PR-OCT system were compared to the known histologic findings and quantitatively evaluated. A sensitivity of 100% and specificity of 99.7% can be reached. Further, the area under the receiver operating characteristic (ROC) curves (AUC) of 0.998 is achieved. Conclusions: Our results demonstrate that PR-OCT can be used to give an accurate real-time computer-aided diagnosis of colonic neoplastic mucosa. Future development of this system as an "optical biopsy" tool to assist doctors in real-time for early mucosal neoplasms screening and treatment evaluation following initial oncologic therapy is planned.
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Affiliation(s)
- Yifeng Zeng
- Department of Biomedical Engineering, Washington University in St. Louis
| | - Shiqi Xu
- Department of Electrical & System Engineering, Washington University in St. Louis
| | - William C. Chapman
- Department of Surgery, Section of Colon and Rectal Surgery, Washington University School of Medicine
| | - Shuying Li
- Department of Biomedical Engineering, Washington University in St. Louis
| | - Zahra Alipour
- Department of Pathology and Immunology, Washington University School of Medicine
| | - Heba Abdelal
- Department of Pathology and Immunology, Washington University School of Medicine
| | - Deyali Chatterjee
- Department of Pathology and Immunology, Washington University School of Medicine
| | - Matthew Mutch
- Department of Surgery, Section of Colon and Rectal Surgery, Washington University School of Medicine
| | - Quing Zhu
- Department of Biomedical Engineering, Washington University in St. Louis
- Department of Radiology, Washington University School of Medicine
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12
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Deonarain S, Motala A, Mthembu T, Nxele N, Phakathi T, Thwala N, Rampersad N. Macular thicknesses in patients with keratoconus: An optical coherence tomography study. AFRICAN VISION AND EYE HEALTH 2019. [DOI: 10.4102/aveh.v78i1.482] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Background: Keratoconus, a corneal ectasia associated with thickness and structural changes, has been reported to co-exist with posterior segment ocular conditions. However, very few studies have reported on macular thicknesses in individuals with keratoconus.Aim: The aim of this study was to investigate macular thicknesses in participants with keratoconus.Setting: This study was conducted at the University of KwaZulu-Natal (UKZN).Methods: A comparative cross-sectional research design was used. The sample consisted of 88 participants with 44 each in the control and keratoconus (15, 11 and 18 with mild, moderate and severe keratoconus, respectively) groups. Macular thicknesses were obtained with the Fourier-domain Optovue iVue100 optical coherence tomographer using the nine Early Treatment Diabetic Retinopathy Study sectors. Data were analysed using descriptive and inferential statistics.Results: Overall, the mean macular thicknesses were comparable among the control and three keratoconus groups (p ≥ 0.199). The mean central foveal thickness was greater in the severe keratoconus group (259 µm) than the other three study groups that showed similar measurements (247 µm – 248 µm). The central fovea was thinnest followed by the perifovea and parafovea in all four study groups. The mean thickness in the nasal and temporal quadrants of the parafovea and perifovea was thickest and thinnest, respectively, in all four study groups.Conclusion: Macular thicknesses via optical coherence tomography in individuals with keratoconus and controls are similar with thickness differences that are clinically insignificant. Consequently, macular thicknesses should be included in the preoperative assessment of individuals with keratoconus awaiting corneal transplantation to assess the integrity of the retina prior to surgery.
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13
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Li H, Hou X, Lin R, Fan M, Pang S, Jiang L, Liu Q, Fu L. Advanced endoscopic methods in gastrointestinal diseases: a systematic review. Quant Imaging Med Surg 2019; 9:905-920. [PMID: 31281783 DOI: 10.21037/qims.2019.05.16] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Endoscopic imaging is the main method for detecting gastrointestinal diseases, which adversely affect human health. White light endoscopy (WLE) was the first method used for endoscopic examination and is still the preliminary step in the detection of gastrointestinal diseases during clinical examination. However, it cannot accurately diagnose gastrointestinal diseases owing to its poor correlation with histopathological diagnosis. In recent years, many advanced endoscopic methods have emerged to improve the detection accuracy by endoscopy. Chromoendoscopy (CE) enhances the contrast between normal and diseased tissues using biocompatible dye agents. Narrow band imaging (NBI) can improve the contrast between capillaries and submucosal vessels by changing the light source acting on the tissue using special filters to realize the visualization of the vascular structure. Flexible spectral imaging color enhancement (FICE) technique uses the reflectance spectrum estimation technique to obtain individual spectral images and reconstructs an enhanced image of the mucosal surface using three selected spectral images. The i-Scan technology takes advantage of the different reflective properties of normal and diseased tissues to obtain images, and enhances image contrast through post-processing algorithms. These abovementioned methods can be used to detect gastrointestinal diseases by observing the macroscopic structure of the digestive tract mucosa, but the ability of early cancer detection is limited with low resolution. However, based on the principle of confocal imaging, probe-based confocal laser endomicroscopy (pCLE) can enable cellular visualization with high-performance probes, which can present cellular morphology that is highly consistent with that shown by biopsy to provide the possibility of early detection of cancer. Other endoscopic imaging techniques including endoscopic optical coherence tomography (EOCT) and photoacoustic endoscopy (PAE), are also promising for diagnosing gastrointestinal diseases. This review focuses on these technologies and aims to provide an overview of different technologies and their clinical applicability.
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Affiliation(s)
- Hua Li
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan 430074, China.,MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xiaohua Hou
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Rong Lin
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Mengke Fan
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Suya Pang
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Longjie Jiang
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan 430074, China.,MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Qian Liu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan 430074, China.,MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Ling Fu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan 430074, China.,MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan 430074, China
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14
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Li Y, Zhu Z, Chen JJ, Jing JC, Sun CH, Kim S, Chung PS, Chen Z. Multimodal endoscopy for colorectal cancer detection by optical coherence tomography and near-infrared fluorescence imaging. BIOMEDICAL OPTICS EXPRESS 2019; 10:2419-2429. [PMID: 31143497 PMCID: PMC6524571 DOI: 10.1364/boe.10.002419] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/20/2019] [Accepted: 04/01/2019] [Indexed: 05/07/2023]
Abstract
While colonoscopy is the gold standard for diagnosis and classification of colorectal cancer (CRC), its sensitivity and specificity are operator-dependent and are especially poor for small and flat lesions. Contemporary imaging modalities, such as optical coherence tomography (OCT) and near-infrared (NIR) fluorescence, have been investigated to visualize microvasculature and morphological changes for detecting early stage CRC in the gastrointestinal (GI) tract. In our study, we developed a multimodal endoscopic system with simultaneous co-registered OCT and NIR fluorescence imaging. By introducing a contrast agent into the vascular network, NIR fluorescence is able to highlight the cancer-suspected area based on significant change of tumor vascular density and morphology caused by angiogenesis. With the addition of co-registered OCT images to reveal subsurface tissue layer architecture, the suspected regions can be further investigated by the altered light scattering resulting from the morphological abnormality. Using this multimodal imaging system, an in vivo animal study was performed using a F344-ApcPircUwm rat, in which the layered architecture and microvasculature of the colorectal wall at different time points were demonstrated. The co-registered OCT and NIR fluorescence images allowed the identification and differentiation of normal colon, hyperplastic polyp, adenomatous polyp, and adenocarcinoma. This multimodal imaging strategy using a single imaging probe has demonstrated the enhanced capability of identification and classification of CRC compared to using any of these technologies alone, thus has the potential to provide a new clinical tool to advance gastroenterology practice.
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Affiliation(s)
- Yan Li
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92617, USA
- Department of Biomedical Engineering, University of California, Irvine, 5200 Engineering Hall, Irvine, CA 92697, USA
- Co-first authors with equal contribution
| | - Zhikai Zhu
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92617, USA
- Department of Biomedical Engineering, University of California, Irvine, 5200 Engineering Hall, Irvine, CA 92697, USA
- Co-first authors with equal contribution
| | - Jason J. Chen
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92617, USA
- Department of Biomedical Engineering, University of California, Irvine, 5200 Engineering Hall, Irvine, CA 92697, USA
| | - Joseph C. Jing
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92617, USA
- Department of Biomedical Engineering, University of California, Irvine, 5200 Engineering Hall, Irvine, CA 92697, USA
| | - Chung-Ho Sun
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92617, USA
| | - Sehwan Kim
- Department of Biomedical Engineering, College of Medicine, Dankook University, Cheonan 31116, South Korea
| | - Phil-Sang Chung
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Dankook University, Cheonan 31116, South Korea
| | - Zhongping Chen
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92617, USA
- Department of Biomedical Engineering, University of California, Irvine, 5200 Engineering Hall, Irvine, CA 92697, USA
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15
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Optical coherence tomography imaging of melanoma skin cancer. Lasers Med Sci 2018; 34:411-420. [DOI: 10.1007/s10103-018-2696-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 11/22/2018] [Indexed: 11/25/2022]
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16
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Braden B, Jones-Morris E. How to get the most out of costly Barrett's oesophagus surveillance. Dig Liver Dis 2018; 50:871-877. [PMID: 29730158 DOI: 10.1016/j.dld.2018.04.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/11/2018] [Accepted: 04/12/2018] [Indexed: 12/11/2022]
Abstract
Current endoscopic surveillance protocols for Barrett's oesophagus have several limitations, mainly the poor cost-effectiveness and high miss rate. However, there is sufficient evidence that patients enrolled in a surveillance program have better survival chances of oesophageal cancer due to earlier tumor stages at diagnosis compared to patients with de novo diagnosed oesophagus cancer. Risk stratifications aim to identify patients at highest risk of developing adenocarcinoma of the oesophagus; most of them base on the length of the Barrett's segment and the presence of dysplasia. This review discusses prognostic factors and provides practical guidance on how to improve the efficacy and outcome in Barrett's surveillance programs.
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Affiliation(s)
- Barbara Braden
- Translation Gastroenterology Unit, Oxford University Hospitals NHS Foundation Trust, Oxford, UK.
| | - Evonne Jones-Morris
- Translation Gastroenterology Unit, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
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17
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Batz S, Wahrlich C, Alawi A, Ulrich M, Lademann J. Differentiation of Different Nonmelanoma Skin Cancer Types Using OCT. Skin Pharmacol Physiol 2018; 31:238-245. [PMID: 29894994 DOI: 10.1159/000489269] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 04/09/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Early detection of various types of nonmelanoma skin cancer has been a challenge in dermatology. Noninvasive examination procedures such as optical coherence tomography (OCT) play an increasingly important role, besides the established gold standard of histological tissue sample analysis. OCT is a noninvasive, cross-sectional, real-time technique that allows conclusions to be drawn with regard to the presence of pathologies. OBJECTIVE The objective of this study was to investigate whether it is possible to distinguish between different types of nonmelanoma skin cancer using OCT or not. METHODS A study population of a total of 25 cases, comprising 5 cases, each, of 5 tumor entities (i.e., basal cell carcinoma, superficial basal cell carcinoma, actinic keratosis, squamous cell carcinoma, and Bowen disease) was examined. Relevant lesions were scanned both centrally and peripherally in the multislice mode. All OCT images were blinded, randomized, analyzed, and evaluated by 2 clinicians experienced in OCT. RESULTS This study demonstrated that it is possible to determine correlations between various types of tumors and recurring tumor characteristics. CONCLUSION This study showed that it is possible to distinguish between the different nonmelanoma skin cancers by using OCT, but further prospective studies have to be conducted to validate the sensitivity and specificity of the criteria.
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Affiliation(s)
- Sebastian Batz
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Caroline Wahrlich
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Arash Alawi
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Martina Ulrich
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Jürgen Lademann
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
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18
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LI YAN, JING JOSEPH, YU JUNXIAO, ZHANG BUYUN, HUO TIANCHENG, YANG QIANG, CHEN ZHONGPING. Multimodality endoscopic optical coherence tomography and fluorescence imaging technology for visualization of layered architecture and subsurface microvasculature. OPTICS LETTERS 2018; 43:2074-2077. [PMID: 29714749 PMCID: PMC6443372 DOI: 10.1364/ol.43.002074] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Endoscopic imaging technologies, such as endoscopic optical coherence tomography (OCT) and near-infrared fluorescence, have been used to investigate vascular and morphological changes as hallmarks of early cancer in the gastrointestinal tract. Here we developed a high-speed multimodality endoscopic OCT and fluorescence imaging system. Using this system, the architectural morphology and vasculature of the rectum wall were obtained simultaneously from a Sprague Dawley rat in vivo. This multimodality imaging strategy in a single imaging system permits the use of a single imaging probe, thereby improving prognosis by early detection and reducing costs.
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Affiliation(s)
- YAN LI
- Department of Biomedical Engineering and Beckman laser institute, University of California, Irvine, Irvine, California 92617, USA
- Department of Biomedical Engineering, University of California, 5200 Engineering Hall, Irvine, California 92697, USA
| | - JOSEPH JING
- Department of Biomedical Engineering and Beckman laser institute, University of California, Irvine, Irvine, California 92617, USA
- Department of Biomedical Engineering, University of California, 5200 Engineering Hall, Irvine, California 92697, USA
| | - JUNXIAO YU
- Department of Biomedical Engineering and Beckman laser institute, University of California, Irvine, Irvine, California 92617, USA
- Department of Biomedical Engineering, University of California, 5200 Engineering Hall, Irvine, California 92697, USA
| | - BUYUN ZHANG
- Department of Biomedical Engineering and Beckman laser institute, University of California, Irvine, Irvine, California 92617, USA
| | - TIANCHENG HUO
- Department of Biomedical Engineering and Beckman laser institute, University of California, Irvine, Irvine, California 92617, USA
| | - QIANG YANG
- Department of Biomedical Engineering and Beckman laser institute, University of California, Irvine, Irvine, California 92617, USA
| | - ZHONGPING CHEN
- Department of Biomedical Engineering and Beckman laser institute, University of California, Irvine, Irvine, California 92617, USA
- Department of Biomedical Engineering, University of California, 5200 Engineering Hall, Irvine, California 92697, USA
- Corresponding author:
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19
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Luo S, Wang D, Tang J, Zhou L, Duan C, Wang D, Liu H, Zhu Y, Li G, Zhao H, Wu Y, An X, Li X, Liu Y, Huo L, Xie H. Circumferential-scanning endoscopic optical coherence tomography probe based on a circular array of six 2-axis MEMS mirrors. BIOMEDICAL OPTICS EXPRESS 2018; 9:2104-2114. [PMID: 29760973 PMCID: PMC5946774 DOI: 10.1364/boe.9.002104] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 03/21/2018] [Accepted: 04/01/2018] [Indexed: 06/08/2023]
Abstract
We present a novel circumferential-scan endoscopic optical coherence tomography (OCT) probe by using a circular array of six electrothermal microelectromechanical (MEMS) mirrors and six C-lenses. The MEMS mirrors have a 0.5 mm × 0.5 mm mirror plate and a chip size of 1.5 mm × 1.3 mm. Each MEMS mirror can scan up to 45° at a voltage of less than 12 V. Six of those mirrors have been successfully packaged to a probe head; full circumferential scans have been demonstrated. Furthermore, each scan unit is composed of a MEMS mirror and a C-lens and the six scan units can be designed with different focal lengths to adapt for lesions with uneven surfaces. Configured with a swept source OCT system, this MEMS array-based circumferential scanning probe has been applied to image a swine's small intestine wrapped on a 20 mm-diameter glass tube. The OCT imaging result shows that this new MEMS endoscopic OCT has promising applications in large tubular organs.
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Affiliation(s)
- Site Luo
- Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518000, China
| | - Dan Wang
- Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
| | - Jianyu Tang
- Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
| | - Liang Zhou
- University of Florida, Gainesville, FL, 26110-613, USA
| | - Can Duan
- University of Florida, Gainesville, FL, 26110-613, USA
| | - Donglin Wang
- School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450000, China
- Wuxi WiO Technologies Co. Ltd., Wuxi, 214000, China
| | - Hao Liu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515 China
| | - Yu Zhu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515 China
| | - Guoxing Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515 China
| | - Hui Zhao
- Foshan Optomedic Technologies Co., Ltd. Foshan, 280000, China
| | - Yuqing Wu
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215000, China
| | - Xin An
- Foshan Optomedic Technologies Co., Ltd. Foshan, 280000, China
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215000, China
| | - Xinling Li
- Wuxi WiO Technologies Co. Ltd., Wuxi, 214000, China
| | - Yabing Liu
- Wuxi WiO Technologies Co. Ltd., Wuxi, 214000, China
| | - Li Huo
- Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
| | - Huikai Xie
- University of Florida, Gainesville, FL, 26110-613, USA
- Wuxi WiO Technologies Co. Ltd., Wuxi, 214000, China
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20
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Kaul V. Optical Coherence Tomography for Barrett Esophagus. Gastroenterol Hepatol (N Y) 2018; 14:253-255. [PMID: 29942226 PMCID: PMC6009188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- Vivek Kaul
- Segal-Watson Professor of Medicine Chief, Division of Gastroenterology & Hepatology Center for Advanced Therapeutic Endoscopy University of Rochester Medical Center & Strong Memorial Hospital Rochester, New York
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21
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Monroy GL, Won J, Spillman DR, Dsouza R, Boppart SA. Clinical translation of handheld optical coherence tomography: practical considerations and recent advancements. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-30. [PMID: 29260539 PMCID: PMC5735247 DOI: 10.1117/1.jbo.22.12.121715] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 12/04/2017] [Indexed: 05/21/2023]
Abstract
Since the inception of optical coherence tomography (OCT), advancements in imaging system design and handheld probes have allowed for numerous advancements in disease diagnostics and characterization of the structural and optical properties of tissue. OCT system developers continue to reduce form factor and cost, while improving imaging performance (speed, resolution, etc.) and flexibility for applicability in a broad range of fields, and nearly every clinical specialty. An extensive array of components to construct customized systems has also become available, with a range of commercial entities that produce high-quality products, from single components to full systems, for clinical and research use. Many advancements in the development of these miniaturized and portable systems can be linked back to a specific challenge in academic research, or a clinical need in medicine or surgery. Handheld OCT systems are discussed and explored for various applications. Handheld systems are discussed in terms of their relative level of portability and form factor, with mention of the supporting technologies and surrounding ecosystem that bolstered their development. Additional insight from our efforts to implement systems in several clinical environments is provided. The trend toward well-designed, efficient, and compact handheld systems paves the way for more widespread adoption of OCT into point-of-care or point-of-procedure applications in both clinical and commercial settings.
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Affiliation(s)
- Guillermo L. Monroy
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana-Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Jungeun Won
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana-Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Darold R. Spillman
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Roshan Dsouza
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Stephen A. Boppart
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana-Champaign, Department of Bioengineering, Urbana, Illinois, United States
- University of Illinois at Urbana-Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois, United States
- Carle-Illinois College of Medicine, Urbana, Illinois, United States
- Address all correspondence to: Stephen A. Boppart, E-mail:
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22
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Park KS, Choi WJ, Song S, Xu J, Wang RK. Multifunctional in vivo imaging for monitoring wound healing using swept-source polarization-sensitive optical coherence tomography. Lasers Surg Med 2017; 50:213-221. [PMID: 29193202 DOI: 10.1002/lsm.22767] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2017] [Indexed: 01/15/2023]
Abstract
BACKGROUND AND OBJECTIVE Wound healing involves a complex and dynamic biological process in response to tissue injury. Monitoring of the cascade of cellular events is useful for wound management and treatment. The aim of this study is to demonstrate the potential of multifunctional polarization-sensitive optical coherence tomography (PS-OCT) to longitudinally monitor the self-healing process in a murine cutaneous wound model. MATERIALS AND METHODS A multi-functional PS-OCT system based on swept source OCT configuration (1,310 nm central wavelength) was designed to obtain simultaneously microstructural, blood perfusion, and birefringent information of a biological tissue in vivo. A 1-mm-diameter wound was generated in a mouse pinna with a complete biopsy punch. Afterwards, the self-healing process of the injured tissue was observed every week over 6-week period using the multifunctional system to measure changes in the tissue birefringence. Further OCT angiography (OCTA) was used in post data processing to obtain blood perfusion information over the injured tissue. RESULTS Three complementary images indicating the changes in anatomical, vascular, and birefringent information of tissue around wound were simultaneously provided from a 3-dimensional (3-D) PS-OCT data set during the wound repair over 1 month. Specifically, inflammatory and proliferative phases of wound healing were characterized by thickened epidermal tissue (from OCT images) and angiogenesis (from OCT angiography images) around wound. Also, it was observed that the regenerating tissues had highly realigned birefringent structures (from PS-OCT images). CONCLUSION This preliminary study suggests that the proposed multi-functional imaging modality has a great potential to improve the understanding of wound healing through non-invasive, serial monitoring of vascular and tissue responses to injury. Lasers Surg. Med. 50:213-221, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Kwan S Park
- Department of Bioengineering, University of Washington, Seattle, Washington 98195
| | - Woo June Choi
- Department of Bioengineering, University of Washington, Seattle, Washington 98195
| | - Shaozhen Song
- Department of Bioengineering, University of Washington, Seattle, Washington 98195
| | - Jingjiang Xu
- Department of Bioengineering, University of Washington, Seattle, Washington 98195
| | - Ruikang K Wang
- Department of Bioengineering, University of Washington, Seattle, Washington 98195
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Jelvehgaran P, Alderliesten T, Weda JJA, de Bruin M, Faber DJ, Hulshof MCCM, van Leeuwen TG, van Herk M, de Boer JF. Visibility of fiducial markers used for image-guided radiation therapy on optical coherence tomography for registration with CT: An esophageal phantom study. Med Phys 2017; 44:6570-6582. [DOI: 10.1002/mp.12624] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Revised: 09/14/2017] [Accepted: 10/03/2017] [Indexed: 12/13/2022] Open
Affiliation(s)
- Pouya Jelvehgaran
- Department of Biomedical Engineering and Physics; Academic Medical Center; University of Amsterdam; Amsterdam AZ 1105 The Netherlands
- Department of Radiation Oncology; Academic Medical Center; University of Amsterdam; Amsterdam AZ 1105 The Netherlands
- Institute for Laser Life and Biophotonics Amsterdam; Physics and Astronomy; VU University Amsterdam; Amsterdam HV 1081 The Netherlands
| | - Tanja Alderliesten
- Department of Radiation Oncology; Academic Medical Center; University of Amsterdam; Amsterdam AZ 1105 The Netherlands
| | - Jelmer J. A. Weda
- Institute for Laser Life and Biophotonics Amsterdam; Physics and Astronomy; VU University Amsterdam; Amsterdam HV 1081 The Netherlands
| | - Martijn de Bruin
- Department of Biomedical Engineering and Physics; Academic Medical Center; University of Amsterdam; Amsterdam AZ 1105 The Netherlands
- Department of Urology; Academic Medical Center; University of Amsterdam; Amsterdam AZ 1105 The Netherlands
| | - Dirk J. Faber
- Department of Biomedical Engineering and Physics; Academic Medical Center; University of Amsterdam; Amsterdam AZ 1105 The Netherlands
| | - Maarten C. C. M. Hulshof
- Department of Radiation Oncology; Academic Medical Center; University of Amsterdam; Amsterdam AZ 1105 The Netherlands
| | - Ton G. van Leeuwen
- Department of Biomedical Engineering and Physics; Academic Medical Center; University of Amsterdam; Amsterdam AZ 1105 The Netherlands
| | - Marcel van Herk
- Department of Biomedical Engineering and Physics; Academic Medical Center; University of Amsterdam; Amsterdam AZ 1105 The Netherlands
- Institute of Cancer Sciences; University of Manchester; Manchester UK
| | - Johannes F. de Boer
- Institute for Laser Life and Biophotonics Amsterdam; Physics and Astronomy; VU University Amsterdam; Amsterdam HV 1081 The Netherlands
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Waldner MJ, Rath T, Schürmann S, Bojarski C, Atreya R. Imaging of Mucosal Inflammation: Current Technological Developments, Clinical Implications, and Future Perspectives. Front Immunol 2017; 8:1256. [PMID: 29075256 PMCID: PMC5641553 DOI: 10.3389/fimmu.2017.01256] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 09/21/2017] [Indexed: 12/12/2022] Open
Abstract
In recent years, various technological developments markedly improved imaging of mucosal inflammation in patients with inflammatory bowel diseases. Although technological developments such as high-definition-, chromo-, and autofluorescence-endoscopy led to a more precise and detailed assessment of mucosal inflammation during wide-field endoscopy, probe-based and stationary confocal laser microscopy enabled in vivo real-time microscopic imaging of mucosal surfaces within the gastrointestinal tract. Through the use of fluorochromes with specificity against a defined molecular target combined with endoscopic techniques that allow ultrastructural resolution, molecular imaging enables in vivo visualization of single molecules or receptors during endoscopy. Molecular imaging has therefore greatly expanded the clinical utility and applications of modern innovative endoscopy, which include the diagnosis, surveillance, and treatment of disease as well as the prediction of the therapeutic response of individual patients. Furthermore, non-invasive imaging techniques such as computed tomography, magnetic resonance imaging, scintigraphy, and ultrasound provide helpful information as supplement to invasive endoscopic procedures. In this review, we provide an overview on the current status of advanced imaging technologies for the clinical non-invasive and endoscopic evaluation of mucosal inflammation. Furthermore, the value of novel methods such as multiphoton microscopy, optoacoustics, and optical coherence tomography and their possible future implementation into clinical diagnosis and evaluation of mucosal inflammation will be discussed.
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Affiliation(s)
- Maximilian J Waldner
- Department of Medicine 1, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Timo Rath
- Department of Medicine 1, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Sebastian Schürmann
- Institute of Medical Biotechnology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Christian Bojarski
- Department of Gastroenterology, Infectiology and Rheumatology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Raja Atreya
- Department of Medicine 1, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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Hoffman A, Manner H, Rey JW, Kiesslich R. A guide to multimodal endoscopy imaging for gastrointestinal malignancy - an early indicator. Nat Rev Gastroenterol Hepatol 2017; 14:421-434. [PMID: 28611477 DOI: 10.1038/nrgastro.2017.46] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Multimodality imaging is an essential aspect of endoscopic surveillance for the detection of neoplastic lesions, such as dysplasia or intramucosal cancer, because it improves the efficacy of endoscopic surveillance and therapeutic procedures in the gastrointestinal tract. This approach reveals mucosal abnormalities that cannot be detected by standard endoscopy. Currently, these imaging techniques are divided into those for primary detection and those for targeted imaging and characterization, the latter being used to visualize areas of interest in detail and permit histological evaluation. This Review outlines the use of virtual chromoendoscopy, narrow-band imaging, autofluorescence imaging, optical coherence tomography, confocal endomicroscopy and volumetric laser endomicroscopy as new imaging techniques for diagnostic investigation of the gastrointestinal tract. Insights into use of multimodal endoscopic imaging for early disease detection, in particular for pre-malignant lesions, in the oesophagus, stomach and colon are described.
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Affiliation(s)
- Arthur Hoffman
- Department of Internal Medicine II, HSK Hospital, Teaching Hospital of the University Medicine of Mainz, Ludwig-Erhard-Strasse 100, 65199 Wiesbaden, Germany
| | - Henrik Manner
- Department of Internal Medicine II, HSK Hospital, Teaching Hospital of the University Medicine of Mainz, Ludwig-Erhard-Strasse 100, 65199 Wiesbaden, Germany
| | - Johannes W Rey
- Department of Internal Medicine II, HSK Hospital, Teaching Hospital of the University Medicine of Mainz, Ludwig-Erhard-Strasse 100, 65199 Wiesbaden, Germany
| | - Ralf Kiesslich
- Department of Internal Medicine II, HSK Hospital, Teaching Hospital of the University Medicine of Mainz, Ludwig-Erhard-Strasse 100, 65199 Wiesbaden, Germany
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26
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Kim SH, Kang SR, Park HJ, Kim JM, Yi WJ, Kim TI. Improved accuracy in periodontal pocket depth measurement using optical coherence tomography. J Periodontal Implant Sci 2017; 47:13-19. [PMID: 28261520 PMCID: PMC5332330 DOI: 10.5051/jpis.2017.47.1.13] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Accepted: 01/18/2017] [Indexed: 01/06/2023] Open
Abstract
Purpose The purpose of this study was to examine whether periodontal pocket could be satisfactorily visualized by optical coherence tomography (OCT) and to suggest quantitative methods for measuring periodontal pocket depth. Methods We acquired OCT images of periodontal pockets in a porcine model and determined the actual axial resolution for measuring the exact periodontal pocket depth using a calibration method. Quantitative measurements of periodontal pockets were performed by real axial resolution and compared with the results from manual periodontal probing. Results The average periodontal pocket depth measured by OCT was 3.10±0.15 mm, 4.11±0.17 mm, 5.09±0.17 mm, and 6.05±0.21 mm for each periodontal pocket model, respectively. These values were similar to those obtained by manual periodontal probing. Conclusions OCT was able to visualize periodontal pockets and show attachment loss. By calculating the calibration factor to determine the accurate axial resolution, quantitative standards for measuring periodontal pocket depth can be established regardless of the position of periodontal pocket in the OCT image.
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Affiliation(s)
- Sul-Hee Kim
- Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea
| | - Se-Ryong Kang
- Department of Biomedical Radiation Sciences, Seoul National University Graduate School of Convergence Science and Technology, Seoul, Korea
| | - Hee-Jung Park
- Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea.; Department of Health Policy and Management, Korea University College of Health Sciences, Seoul, Korea
| | - Jun-Min Kim
- Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
| | - Won-Jin Yi
- Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea.; Department of Oral and Maxillofacial Radiology, Seoul National University School of Dentistry, Seoul, Korea
| | - Tae-Il Kim
- Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea.; Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
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Old OJ, Isabelle M, Barr H. Staging Early Esophageal Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 908:161-81. [PMID: 27573772 DOI: 10.1007/978-3-319-41388-4_9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Staging esophageal cancer provides a standardized measure of the extent of disease that can be used to inform decisions about therapy and guide prognosis. For esophageal cancer, the treatment pathways vary greatly depending on stage of disease, and accurate staging is therefore crucial in ensuring the optimal therapy for each patient. For early esophageal cancer (T1 lesions), endoscopic resection can be curative and simultaneously gives accurate staging of depth of invasion. For tumors invading the submucosa or more advanced disease, comprehensive investigation is required to accurately stage the tumor and assess suitability for curative resection. A combined imaging approach of computed tomography (CT), positron emission tomography (PET), and endoscopic ultrasound (EUS) offers complementary diagnostic information and gives the greatest chance of accurate staging. Staging laparoscopy can identify peritoneal disease and small superficial liver lesions that could be missed on CT or PET, and alters management in up to 20 % of patients. Optical diagnostic techniques offer the prospect of further extending the possibilities of endoscopic staging in real time. Optical coherence tomography can image superficial lesions and could provide information on depth of invasion for these lesions. Real-time lymph node analysis using optical diagnostics such as Raman spectroscopy could be used to support immediate endoscopic therapy without waiting for results of cytology or further investigations.
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Affiliation(s)
- O J Old
- Upper GI Surgery Department, Gloucestershire Royal Hospital, Gloucester, UK. .,Biophotonics Research Unit, Gloucestershire Royal Hospital, Gloucester, UK.
| | - M Isabelle
- Biophotonics Research Unit, Gloucestershire Royal Hospital, Gloucester, UK
| | - H Barr
- Upper GI Surgery Department, Gloucestershire Royal Hospital, Gloucester, UK
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Novikova T. Optical techniques for cervical neoplasia detection. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:1844-1862. [PMID: 29046833 PMCID: PMC5629403 DOI: 10.3762/bjnano.8.186] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 08/09/2017] [Indexed: 05/04/2023]
Abstract
This paper provides an overview of the current research in the field of optical techniques for cervical neoplasia detection and covers a wide range of the existing and emerging technologies. Using colposcopy, a visual inspection of the uterine cervix with a colposcope (a binocular microscope with 3- to 15-fold magnification), has proven to be an efficient approach for the detection of invasive cancer. Nevertheless, the development of a reliable and cost-effective technique for the identification of precancerous lesions, confined to the epithelium (cervical intraepithelial neoplasia) still remains a challenging problem. It is known that even at early stages the neoplastic transformations of cervical tissue induce complex changes and modify both structural and biochemical properties of tissues. The different methods, including spectroscopic (diffuse reflectance spectroscopy, induced fluorescence and autofluorescence spectroscopy, Raman spectroscopy) and imaging techniques (confocal microscopy, optical coherence tomography, Mueller matrix imaging polarimetry, photoacoustic imaging), probe different tissue properties that may serve as optical biomarkers for diagnosis. Both the advantages and drawbacks of these techniques for the diagnosis of cervical precancerous lesions are discussed and compared.
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Affiliation(s)
- Tatiana Novikova
- LPICM, CNRS, Ecole polytechnique, University Paris Saclay, Palaiseau, France
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Tontini GE, Pastorelli L, Ishaq S, Neumann H. Advances in endoscopic imaging in ulcerative colitis. Expert Rev Gastroenterol Hepatol 2016; 9:1393-405. [PMID: 26365308 DOI: 10.1586/17474124.2015.1087848] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Modern strategies for the treatment of ulcerative colitis require more accurate tools for gastrointestinal imaging to better assess mucosal disease activity and long-term prognostic clinical outcomes. Recent advances in gastrointestinal luminal endoscopy are radically changing the role of endoscopy in every-day clinical practice and research trials. Advanced endoscopic imaging techniques including high-definition endoscopes, optical magnification endoscopy, and various chromoendoscopy techniques have remarkably improved endoscopic assessment of ulcerative colitis. More recently, optical biopsy techniques with either endocytoscopy or confocal laser endomicroscopy have shown great potential in predicting several histological changes in real time during ongoing endoscopy. Here, we review current applications of advanced endoscopic imaging techniques in ulcerative colitis and present the most promising upcoming headways in this field.
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Affiliation(s)
- Gian Eugenio Tontini
- a 1 Gastroenterology and Digestive Endoscopy Unit, IRCCS Policlinico San Donato, San Donato Milanese, Italy
| | - Luca Pastorelli
- a 1 Gastroenterology and Digestive Endoscopy Unit, IRCCS Policlinico San Donato, San Donato Milanese, Italy.,b 2 Department of Biomedical Sciences for Health, University of Milan, Milano, Italy
| | - Sauid Ishaq
- c 3 Department of Gastroenterology, Dudley Group Hospitals, Birmingham City University, Birmingham, UK.,d 4 Department of Medicine, St. George's University, Grenada, West Indies
| | - Helmut Neumann
- e 5 Department of Medicine I, University of Erlangen-Nuremberg, Erlangen, Germany
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Beg S, Wilson A, Ragunath K. The use of optical imaging techniques in the gastrointestinal tract. Frontline Gastroenterol 2016; 7:207-215. [PMID: 27429735 PMCID: PMC4941161 DOI: 10.1136/flgastro-2015-100563] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 05/15/2015] [Accepted: 05/19/2015] [Indexed: 02/04/2023] Open
Abstract
With significant advances in the management of gastrointestinal disease there has been a move from diagnosing advanced pathology, to detecting early lesions that are potentially amenable to curative endoscopic treatment. This has required an improvement in diagnostics, with a focus on identifying and characterising subtle mucosal changes. There is great interest in the use of optical technologies to predict histology and enable the formulation of a real-time in vivo diagnosis, a so-called 'optical biopsy'. The aim of this review is to explore the evidence for the use of the current commercially available imaging techniques in the gastrointestinal tract.
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Affiliation(s)
- Sabina Beg
- NIHR Biomedical Research Unit in Gastrointestinal and Liver Diseases at Nottingham University Hospitals NHS Trust and The University of Nottingham, Queens Medical Centre Campus, Nottingham, UK
| | - Ana Wilson
- Department of Gastroenterology, Wolfson Unit for Endoscopy, St Mark's hospital, London, UK
| | - Krish Ragunath
- NIHR Biomedical Research Unit in Gastrointestinal and Liver Diseases at Nottingham University Hospitals NHS Trust and The University of Nottingham, Queens Medical Centre Campus, Nottingham, UK
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Garcia JA, Benboujja F, Beaudette K, Rogers D, Maurer R, Boudoux C, Hartnick CJ. Collagen Content Limits Optical Coherence Tomography Image Depth in Porcine Vocal Fold Tissue. Otolaryngol Head Neck Surg 2016; 155:829-836. [PMID: 27352894 DOI: 10.1177/0194599816658005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 06/14/2016] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Vocal fold scarring, a condition defined by increased collagen content, is challenging to treat without a method of noninvasively assessing vocal fold structure in vivo. The goal of this study was to observe the effects of vocal fold collagen content on optical coherence tomography imaging to develop a quantifiable marker of disease. STUDY DESIGN Excised specimen study. SETTING Massachusetts Eye and Ear Infirmary. SUBJECTS AND METHODS Porcine vocal folds were injected with collagenase to remove collagen from the lamina propria. Optical coherence tomography imaging was performed preinjection and at 0, 45, 90, and 180 minutes postinjection. Mean pixel intensity (or image brightness) was extracted from images of collagenase- and control-treated hemilarynges. Texture analysis of the lamina propria at each injection site was performed to extract image contrast. Two-factor repeated measure analysis of variance and t tests were used to determine statistical significance. Picrosirius red staining was performed to confirm collagenase activity. RESULTS Mean pixel intensity was higher at injection sites of collagenase-treated vocal folds than control vocal folds (P < .0001). Fold change in image contrast was significantly increased in collagenase-treated vocal folds than control vocal folds (P = .002). Picrosirius red staining in control specimens revealed collagen fibrils most prominent in the subepithelium and above the thyroarytenoid muscle. Specimens treated with collagenase exhibited a loss of these structures. CONCLUSION Collagen removal from vocal fold tissue increases image brightness of underlying structures. This inverse relationship may be useful in treating vocal fold scarring in patients.
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Affiliation(s)
| | - Fouzi Benboujja
- Department of Engineering Physics, Polytechnique Montreal, Montreal, Canada
| | - Kathy Beaudette
- Department of Engineering Physics, Polytechnique Montreal, Montreal, Canada
| | - Derek Rogers
- Madigan Army Medical Center, Tacoma, Washington, USA
| | - Rie Maurer
- Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Caroline Boudoux
- Department of Engineering Physics, Polytechnique Montreal, Montreal, Canada
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Kim J, Ahmad A, Li J, Marjanovic M, Chaney EJ, Suslick KS, Boppart SA. Intravascular magnetomotive optical coherence tomography of targeted early-stage atherosclerotic changes in ex vivo hyperlipidemic rabbit aortas. JOURNAL OF BIOPHOTONICS 2016; 9:109-16. [PMID: 25688525 PMCID: PMC4996077 DOI: 10.1002/jbio.201400128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 12/14/2014] [Accepted: 01/02/2015] [Indexed: 05/19/2023]
Abstract
We report the development of an intravascular magnetomotive optical coherence tomography (IV-MM-OCT) system used with targeted protein microspheres to detect early-stage atherosclerotic fatty streaks/plaques. Magnetic microspheres (MSs) were injected in vivo in rabbits, and after 30 minutes of in vivo circulation, excised ex vivo rabbit aorta samples specimens were then imaged ex vivo with our prototype IV-MM-OCT system. The alternating magnetic field gradient was provided by a unique pair of external custom-built electromagnetic coils that modulated the targeted magnetic MSs. The results showed a statistically significant MM-OCT signal from the aorta samples specimens injected with targeted MSs.
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Affiliation(s)
- Jongsik Kim
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
| | - Adeel Ahmad
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
| | - Joanne Li
- Department of Bioengineering, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
| | - Marina Marjanovic
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
- Department of Bioengineering, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
| | - Eric J. Chaney
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
| | - Kenneth S. Suslick
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
- Department of Chemistry, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
| | - Stephen A. Boppart
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
- Department of Bioengineering, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
- Department of Internal Medicine, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL, USA 61801
- Corresponding author: , Phone: +01 217 333 8598, Fax: +01 217 333 5833
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Lopez WOC, Ângelos JS, Martinez RCR, Takimura CK, Teixeira MJ, Lemos Neto PA, Fonoff ET. Optical coherence tomography imaging of the basal ganglia: feasibility and brief review. ACTA ACUST UNITED AC 2015; 48:1156-9. [PMID: 26421868 PMCID: PMC4661034 DOI: 10.1590/1414-431x20154679] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 04/22/2015] [Indexed: 11/22/2022]
Abstract
Optical coherence tomography (OCT) is a promising medical imaging technique that uses
light to capture real-time cross-sectional images from biological tissues in
micrometer resolution. Commercially available optical coherence tomography systems
are employed in diverse applications, including art conservation and diagnostic
medicine, notably in cardiology and ophthalmology. Application of this technology in
the brain may enable distinction between white matter and gray matter, and obtainment
of detailed images from within the encephalon. We present, herein, the in
vivo implementation of OCT imaging in the rat brain striatum. For this,
two male 60-day-old rats (Rattus norvegicus, Albinus variation,
Wistar) were stereotactically implanted with guide cannulas into the striatum to
guide a 2.7-French diameter high-definition OCT imaging catheter (Dragonfly™, St.
Jude Medical, USA). Obtained images were compared with corresponding histologically
stained sections to collect imaging samples. A brief analysis of OCT technology and
its current applications is also reported, as well as intra-cerebral OCT feasibility
on brain mapping during neurosurgical procedures.
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Affiliation(s)
- W O Contreras Lopez
- Departamento de Neurologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - J S Ângelos
- Departamento de Neurologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - R C R Martinez
- Laboratório de Neuromodulação e Dor Experimental, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - C K Takimura
- Instituto do Coração, Universidade de São Paulo, São Paulo, SP, Brasil
| | - M J Teixeira
- Departamento de Neurologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - P A Lemos Neto
- Instituto do Coração, Universidade de São Paulo, São Paulo, SP, Brasil
| | - E T Fonoff
- Departamento de Neurologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
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Beg S, Ragunath K. Image-enhanced endoscopy technology in the gastrointestinal tract: what is available? Best Pract Res Clin Gastroenterol 2015; 29:627-38. [PMID: 26381307 DOI: 10.1016/j.bpg.2015.05.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 04/27/2015] [Accepted: 05/21/2015] [Indexed: 02/08/2023]
Abstract
Gastrointestinal malignancy accounts for approximately a fifth of all cancer deaths in the United Kingdom. By the time patients are symptomatic, lesions are often advanced, with limited treatment options available. The development of effective endoscopic therapies means that neoplastic lesions can now be treated with improved patient outcomes. This has led to a paradigm shift, whereby the aim of digestive endoscopy is to identify premalignant conditions or early neoplastic change, in order to make an impact on their natural history. This has necessitated an improvement in imaging techniques in order to identify subtle mucosal changes that may harbour precancerous cells. At present there is an array of available imaging modalities, each with implications on cost, training and lesion detection. Here we describe the scientific rationale behind the major commercially available techniques as well as offering a glimpse at possible future directions.
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Affiliation(s)
- Sabina Beg
- Nottingham Digestive Diseases Biomedical Research Unit, Nottingham University Hospital, Queens Medical Centre, Derby Road, Nottingham NG7 2UH, UK.
| | - Krish Ragunath
- Nottingham Digestive Diseases Biomedical Research Unit, Nottingham University Hospital, Queens Medical Centre, Derby Road, Nottingham NG7 2UH, UK.
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Gonzalez-Haba M, Waxman I. Red flag imaging in Barrett's esophagus: does it help to find the needle in the haystack? Best Pract Res Clin Gastroenterol 2015; 29:545-60. [PMID: 26381301 DOI: 10.1016/j.bpg.2015.05.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 04/23/2015] [Accepted: 05/21/2015] [Indexed: 02/07/2023]
Abstract
Esophageal Adenocarcinoma (EAC) has suffered a sharp increase on its incidence for the last decades, and it is associated with a poor prognosis. Barrett's Esophagus (BE) is the most important identifiable risk factor for the progression to esophageal adenocarcinoma. The key to prevent and provide a curative treatment of esophageal adenocarcinoma is the detection and eradication of early neoplasia in patients with esophagus. Endoscopic surveillance is evolving from a blind or random four quadrant biopsies protocol (Seattle protocol) to a more targeted approach. A detailed white light examination with high-resolution endoscopy is the cornerstone for recognition of early neoplastic lesions in BE. Additional imaging modalities may enhance targeting of lesions or provide more information at a focused level. There are emerging data that some of these new modalities can increase the yield of detecting dysplasia, although its routine use has yet to be validated.
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Affiliation(s)
- Mariano Gonzalez-Haba
- Center for Endoscopic Research and Therapeutics (CERT), The University of Chicago Medicine and Biological Sciences, Center for Care and Discovery, 5700 S Maryland Ave. MC 8043, Chicago, IL 60637, USA.
| | - Irving Waxman
- Center for Endoscopic Research and Therapeutics (CERT), The University of Chicago Medicine and Biological Sciences, Center for Care and Discovery, 5700 S Maryland Ave. MC 8043, Chicago, IL 60637, USA.
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Tontini GE, Vecchi M, Pastorelli L, Neurath MF, Neumann H. Differential diagnosis in inflammatory bowel disease colitis: State of the art and future perspectives. World J Gastroenterol 2015; 21:21-46. [PMID: 25574078 PMCID: PMC4284336 DOI: 10.3748/wjg.v21.i1.21] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 07/31/2014] [Accepted: 09/16/2014] [Indexed: 02/06/2023] Open
Abstract
Distinction between Crohn’s disease of the colon-rectum and ulcerative colitis or inflammatory bowel disease (IBD) type unclassified can be of pivotal importance for a tailored clinical management, as each entity often involves specific therapeutic strategies and prognosis. Nonetheless, no gold standard is available and the uncertainty of diagnosis may frequently lead to misclassification or repeated examinations. Hence, we have performed a literature search to address the problem of differential diagnosis in IBD colitis, revised current and emerging diagnostic tools and refined disease classification strategies. Nowadays, the differential diagnosis is an untangled issue, and the proper diagnosis cannot be reached in up to 10% of patients presenting with IBD colitis. This topic is receiving emerging attention, as medical therapies, surgical approaches and leading prognostic outcomes require more and more disease-specific strategies in IBD patients. The optimization of standard diagnostic approaches based on clinical features, biomarkers, radiology, endoscopy and histopathology appears to provide only marginal benefits. Conversely, emerging diagnostic techniques in the field of gastrointestinal endoscopy, molecular pathology, genetics, epigenetics, metabolomics and proteomics have already shown promising results. Novel advanced endoscopic imaging techniques and biomarkers can shed new light for the differential diagnosis of IBD, better reflecting diverse disease behaviors based on specific pathogenic pathways.
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Vanbiervliet G, Gonzalez JM, Barthet M. Endoscopy innovations. Gastrointest Endosc 2014; 80:380-3. [PMID: 25127939 DOI: 10.1016/j.gie.2014.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 07/01/2014] [Indexed: 02/08/2023]
Affiliation(s)
- Geoffroy Vanbiervliet
- Faculty of Medicine, Aix-Marseille University, Marseille, France; Gastroenterology, University Hospital of Nice, Nice, France
| | - Jean-Michel Gonzalez
- Faculty of Medicine, Aix-Marseille University, Marseille, France; Gastroenterology, Public Assistance Hospitals of Marseille, Marseille, France
| | - Marc Barthet
- Faculty of Medicine, Aix-Marseille University, Marseille, France; Gastroenterology, Public Assistance Hospitals of Marseille, Marseille, France
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