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Chen Y, Chu J, Xin B, Qi J. Mechanical stability of polarization signatures in biological tissue characterization. BIOMEDICAL OPTICS EXPRESS 2024; 15:2652-2665. [PMID: 38633097 PMCID: PMC11019670 DOI: 10.1364/boe.518756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/19/2024] [Accepted: 03/19/2024] [Indexed: 04/19/2024]
Abstract
Mueller matrix imaging polarimetry (MMIP) is a promising technique for investigating structural abnormalities in pathological diagnosis. The characterization stability of polarization signatures, described by Mueller matrix parameters (MMPs), correlates with the mechanical state of the biological medium. In this study, we developed an MMIP system capable of applying quantitative forces to samples and measuring the resulting polarization signatures. Mechanical stretching experiments were conducted on a mimicking phantom and a tissue sample at different force scales. We analyzed the textural features and data distribution of MMP images and evaluated the force effect on the characterization of MMPs using the structural similarity index. The results demonstrate that changes in the mechanical microenvironment (CMM) can cause textural fluctuations in MMP images, interfering with the stability of polarization signatures. Specifically, parameters of anisotropic orientation, retardance, and optical rotation are the most sensitive to CMM, inducing a dramatic change in the overall image texture, while other parameters (e.g., polarization, diattenuation, and depolarization) exhibit locality in their response to CMM. For some MMPs, CMM can enhance regional textural contrasts. This study elucidates the mechanical stability of polarization signatures in biological tissue characterization and provides a valuable reference for further research toward minimizing CMM influence.
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Affiliation(s)
- Yongtai Chen
- Research Center for Frontier Fundamental Studies, Zhejiang Lab, Hangzhou 311100, China
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Jinkui Chu
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Benda Xin
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ji Qi
- Research Center for Frontier Fundamental Studies, Zhejiang Lab, Hangzhou 311100, China
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2
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Markus MA, Ferrari DP, Alves F, Ramos-Gomes F. Effect of tissue fixation on the optical properties of structural components assessed by non-linear microscopy imaging. BIOMEDICAL OPTICS EXPRESS 2023; 14:3988-4002. [PMID: 37799688 PMCID: PMC10549744 DOI: 10.1364/boe.488453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/20/2023] [Accepted: 04/25/2023] [Indexed: 10/07/2023]
Abstract
Fixation methods such as formalin are commonly used for the preservation of tissue with the aim of keeping their structure as close as possible to the native condition. However, fixatives chemically interact with tissue molecules, such as collagen in the extracellular matrix (ECM) or myosin, and may thus modify their structure. Taking advantage of the second- and third-harmonic generation (SHG and THG) emission capabilities of such components, we used nonlinear two-photon microscopy (NL2PM) to evaluate the effect that preservation methods, such as chemical fixatives, have on the nonlinear capabilities of protein components within mouse tissues. Our results show that depending on the preservation technique used, the nonlinear capabilities of collagen, lipid droplets and myosin microarchitecture are strongly affected. Parameters of collagen fibers, such as density and branch points, especially in collagen-sparse regions, e.g., in kidneys, were found to be altered upon formalin fixation. Moreover, cryo-freezing drastically reduced SHG signals from myosin. Our findings provide valuable information to select the best tissue fixation method for visualization and quantification of structural proteins, such as collagen and myosin by advanced NL2PM imaging techniques. This may advance the interpretation of the role these proteins play in disease.
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Affiliation(s)
- M. Andrea Markus
- Translational Molecular Imaging Group,
Max-Planck Institute for Multidisciplinary Sciences, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
| | - Daniele P. Ferrari
- Translational Molecular Imaging Group,
Max-Planck Institute for Multidisciplinary Sciences, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
| | - Frauke Alves
- Translational Molecular Imaging Group,
Max-Planck Institute for Multidisciplinary Sciences, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
- Clinic of Haematology and Medical Oncology, Institute of Interventional and Diagnostic Radiology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany
- Cluster of Excellence “Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells” (MBExC), Robert-Koch-Str. 40, 37075 Göttingen, Germany
| | - Fernanda Ramos-Gomes
- Translational Molecular Imaging Group,
Max-Planck Institute for Multidisciplinary Sciences, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
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3
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Podlipec R, Mur J, Petelin J, Štrancar J, Petkovšek R. Method for controlled tissue theranostics using a single tunable laser source. BIOMEDICAL OPTICS EXPRESS 2021; 12:5881-5893. [PMID: 34692222 PMCID: PMC8515989 DOI: 10.1364/boe.428467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 08/07/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
Tissue diseases and related disorders need to be first recognized using diagnostic methods and then later treated by therapeutic methods-a joint procedure called theranostics. One of the main challenges in the field of retinal therapies remains in the success of the treatment, typically improving the local metabolism, by sparing the surrounding tissue and with the immediate information of the laser effect. In our study, we present a concept for real-time controlled tissue theranostics on a proof-of-concept study capable of using a single tunable ps laser source (in terms of irradiance, fluence, and repetition rate), done on ex-vivo human retinal pigment epithelium. We have found autofluorescence intensity and lifetime imaging diagnostics very promising for the recognition and quantification of laser effects ranging from selective non-destructive molecular tissue modification to complete tissue ablation. The main novelty of our work presents the developed algorithm for optimized theranostics based on the model function used to quantify laser-induced tissue changes through the diagnostics descriptors, fluorescence lifetime and fluorescence intensity parameters. This approach, together with the operation of the single adaptable laser source, can serve as a new theranostics method in personalized medicine in the future not only limited to treat retinal diseases.
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Affiliation(s)
- Rok Podlipec
- Laboratory of Biophysics, Condensed Matter Physics Department, Jožef Stefan Institute, Jamova cesta 39, Ljubljana, Slovenia
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Ion Beam Center, Bautzner Landstraße 400, Dresden 01328, Germany
| | - Jaka Mur
- Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, Ljubljana, Slovenia
| | - Jaka Petelin
- Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, Ljubljana, Slovenia
| | - Janez Štrancar
- Laboratory of Biophysics, Condensed Matter Physics Department, Jožef Stefan Institute, Jamova cesta 39, Ljubljana, Slovenia
| | - Rok Petkovšek
- Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, Ljubljana, Slovenia
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Sprenger J, Murray C, Lad J, Jones B, Thomas G, Nofech-Mozes S, Khorasani M, Vitkin A. Toward a quantitative method for estimating tumour-stroma ratio in breast cancer using polarized light microscopy. BIOMEDICAL OPTICS EXPRESS 2021; 12:3241-3252. [PMID: 34221657 PMCID: PMC8221948 DOI: 10.1364/boe.422452] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/28/2021] [Accepted: 05/01/2021] [Indexed: 05/10/2023]
Abstract
The tumour-stroma ratio (TSR) has been explored as a useful source of prognostic information in various cancers, including colorectal, breast, and gastric. Despite research showing potential prognostic utility, its uptake into the clinic has been limited, in part due to challenges associated with subjectivity, reproducibility, and quantification. We have recently proposed a simple, robust, and quantifiable high-contrast method of imaging intra- and peri-tumoural stroma based on polarized light microscopy. Here we report on its use to quantify TSR in human breast cancer using unstained slides from 40 patient samples of invasive ductal carcinoma (IDC). Polarimetric results based on a stromal abundance metric correlated well with pathology designations, showing a statistically significant difference between high- and low-stroma samples as scored by two clinical pathologists. The described polarized light imaging methodology shows promise for use as a quantitative, automatic, and standardizable tool for quantifying TSR, potentially addressing some of the challenges associated with its current estimation.
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Affiliation(s)
- Jillian Sprenger
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Ciara Murray
- Laboratory Medicine Program, University Health Network, Ontario, Canada
| | - Jigar Lad
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Blake Jones
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Georgia Thomas
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Sharon Nofech-Mozes
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | - Mohammadali Khorasani
- Department of Surgery, University of British Columbia, Victoria, Canada
- Co-senior authors
| | - Alex Vitkin
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Canada
- Co-senior authors
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Qu Y, Smith ZJ, Tyler K, Chang S, Shen S, Sun M, Xu RX. Applying limiting entropy to quantify the alignment of collagen fibers by polarized light imaging. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2021; 18:2331-2356. [PMID: 33892548 DOI: 10.3934/mbe.2021118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Collagen alignment has shown clinical significance in a variety of diseases. For instance, vulvar lichen sclerosus (VLS) is characterized by homogenization of collagen fibers with increasing risk of malignant transformation. To date, a variety of imaging techniques have been developed to visualize collagen fibers. However, few works focused on quantifying the alignment quality of collagen fiber. To assess the level of disorder of local fiber orientation, the homogeneity index (HI) based on limiting entropy is proposed as an indicator of disorder. Our proposed methods are validated by verification experiments on Poly Lactic Acid (PLA) filament phantoms with controlled alignment quality of fibers. A case study on 20 VLS tissue biopsies and 14 normal tissue biopsies shows that HI can effectively characterize VLS tissue from normal tissue (P < 0.01). The classification results are very promising with a sensitivity of 93% and a specificity of 95%, which indicated that our method can provide quantitative assessment for the alignment quality of collagen fibers in VLS tissue and aid in improving histopathological examination of VLS.
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Affiliation(s)
- Yingjie Qu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, China
| | - Zachary J Smith
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, China
| | - Kelly Tyler
- Department of Dermatology, the Ohio State University, Columbus, USA
| | - Shufang Chang
- Department of Obstetrics and Gynecology, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Shuwei Shen
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, China
| | - Mingzhai Sun
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, China
| | - Ronald X Xu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, China
- Department of Biomedical Engineering, The Ohio State University, Columbus, USA
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Optical investigation of bovine grey and white matters in visible and near-infrared ranges. POLISH JOURNAL OF MEDICAL PHYSICS AND ENGINEERING 2021. [DOI: 10.2478/pjmpe-2021-0012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Introduction: Due to enormous interests for laser in medicine and biology, optical properties characterization of different tissue have be affecting in development processes. In addition, the optical properties of biological tissues could be influenced by storage methods. Thus, optical properties of bovine white and grey tissues preserved by formalin have been characterized over a wide wavelength spectrum varied between 440 nm and 1000 nm.
Materials and Methods: To that end, a single integrating sphere system was assembled for spectroscopic characterization and an inverse adding-doubling algorithm was used to retrieve optical coefficients, i.e. reduced scattering and absorption coefficients.
Results: White matter has shown a strong scattering property in comparison to grey matter. On the other hand, the grey matter has absorbed light extensively. In comparison, the reduced scattering profile for both tissue types turned out to be consistent with prior works that characterized optical coefficients in vivo. On the contrary, absorption coefficient behavior has a different feature.
Conclusion: Formalin could change the tissue’s optical properties because of the alteration of tissue’s structure and components. The absence of hemoglobin that seeps out due to the use of a formalin could reduce the absorption coefficient over the visible range. Both the water replacement by formalin could reduce the refractive index of a stored tissue and the absence of hemoglobin that scatters light over the presented wavelength range should diminish the reduced scattering coefficients over that wavelength range.
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Schucht P, Lee HR, Mezouar HM, Hewer E, Raabe A, Murek M, Zubak I, Goldberg J, Kovari E, Pierangelo A, Novikova T. Visualization of White Matter Fiber Tracts of Brain Tissue Sections With Wide-Field Imaging Mueller Polarimetry. IEEE TRANSACTIONS ON MEDICAL IMAGING 2020; 39:4376-4382. [PMID: 32822294 DOI: 10.1109/tmi.2020.3018439] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Identification of white matter fiber tracts of the brain is crucial for delineating the tumor border during neurosurgery. A custom-built Mueller polarimeter was used in reflection configuration for the wide-field imaging of thick sections of fixed human brain and fresh calf brain. The maps of the azimuth of the fast optical axis of linear birefringent medium reconstructed from the experimental Mueller matrix images of the specimen by applying a non-linear data compression algorithm showed a strong correlation with the silver-stained sample histology image, which is the gold standard for ex-vivo brain fiber tract visualization. The polarimetric maps of fresh calf brain tissue demonstrated the same trends in the depolarization, the scalar retardance and the azimuth of the fast optical axis as seen in fixed human brain tissue. Thus, label-free imaging Mueller polarimetry shows promise as an efficient intra-operative modality for the visualization of healthy brain white matter fiber tracts, which could improve the accuracy of tumor border detection and, ultimately, patient outcomes.
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Jones B, Thomas G, Sprenger J, Nofech-Mozes S, Khorasani M, Vitkin A. Peri-tumoural stroma collagen organization of invasive ductal carcinoma assessed by polarized light microscopy differs between OncotypeDX risk group. JOURNAL OF BIOPHOTONICS 2020; 13:e202000188. [PMID: 32710711 DOI: 10.1002/jbio.202000188] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/01/2020] [Accepted: 07/19/2020] [Indexed: 05/02/2023]
Abstract
A commercially available genomic test, OncotypeDX has emerged as a useful postsurgical treatment guide for early stage breast cancer. Despite widespread clinical adoption, there remain logistical issues with its implementation. Collagenous stromal architecture has been shown to hold prognostic value that may complement OncotypeDX. Polarimetric analysis of breast cancer surgical samples allows for the quantification of collagenous stroma abundance and organization. We examine intratumoural collagen abundance and alignment along the tumor-host interface for 45 human samples of invasive ductal carcinoma categorized as low or higher risk by OncotypeDX. Furthermore, we probe the separatory power of collagen alignment patterns to classify unlabeled samples as low or higher OncotypeDX risk group using a linear discriminant (LD) model. No significant difference in mean collagen abundance was found between the two risk groups. However, collagen alignment along the tumor boundary was found to be significantly lower in higher risk samples. The LD model achieved a 71% total accuracy and 81% sensitivity to higher risk samples. Prognostic information extracted from the stromal morphology has potential to complement OncotypeDX as an easy-to-implement prescreening methodology.
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Affiliation(s)
- Blake Jones
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Georgia Thomas
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Jillian Sprenger
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Sharon Nofech-Mozes
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | | | - Alex Vitkin
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Canada
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9
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Karnowski K, Li Q, Poudyal A, Villiger M, Farah CS, Sampson DD. Influence of tissue fixation on depth-resolved birefringence of oral cavity tissue samples. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:JBO-200071R. [PMID: 32914607 PMCID: PMC7481436 DOI: 10.1117/1.jbo.25.9.096003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 07/29/2020] [Indexed: 06/11/2023]
Abstract
SIGNIFICANCE To advance our understanding of the contrast observed when imaging with polarization-sensitive optical coherence tomography (PS-OCT) and its correlation with oral cancerous pathologies, a detailed comparison with histology provided via ex vivo fixed tissue is required. The effects of tissue fixation, however, on such polarization-based contrast have not yet been investigated. AIM A study was performed to assess the impact of tissue fixation on depth-resolved (i.e., local) birefringence measured with PS-OCT. APPROACH A PS-OCT system based on depth-encoded polarization multiplexing and polarization-diverse detection was used to measure the Jones matrix of a sample. A wide variety of ex vivo samples were measured freshly after excision and 24 h after fixation, consistent with standard pathology. Some samples were also measured 48 h after fixation. RESULTS The tissue fixation does not diminish the birefringence contrast. Statistically significant changes were observed in 11 out of 12 samples; these changes represented an increase in contrast, overall, by 11% on average. CONCLUSIONS We conclude that the fixed samples are suitable for studies seeking a deeper understanding of birefringence contrast in oral tissue pathology. The enhancement of contrast removes the need to image immediately postexcision and will facilitate future investigations with PS-OCT and other advanced polarization-sensitive microscopy methods, such as mapping of the local optic axis with PS-OCT and PS-optical coherence microscopy.
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Affiliation(s)
- Karol Karnowski
- The University of Western Australia, Optical+Biomedical Engineering Laboratory, Department of Electrical, Electronic, and Computer Engineering, Perth, Western Australia, Australia
- Polish Academy of Sciences, Institute of Physical Chemistry, Warsaw, Poland
| | - Qingyun Li
- The University of Western Australia, Optical+Biomedical Engineering Laboratory, Department of Electrical, Electronic, and Computer Engineering, Perth, Western Australia, Australia
| | - Anima Poudyal
- The University of Western Australia, UWA Dental School, Perth, Western Australia, Australia
| | - Martin Villiger
- Harvard Medical School, Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, Massachusetts, United Sates
| | - Camile S. Farah
- The University of Western Australia, UWA Dental School, Perth, Western Australia, Australia
- Australian Centre for Oral Oncology Research and Education, Perth, Western Australia, Australia
- Fiona Stanley Hospital, Oral, Maxillofacial, and Dental Surgery, Murdoch, Western Australia, Australia
| | - David D. Sampson
- University of Surrey, Surrey Biophotonics, School of Physics, Guilford, United Kingdom
- University of Surrey, Surrey Biophotonics, School of Biosciences and Medicine, Guilford, United Kingdom
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10
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Jones B, Thomas G, Westreich J, Nofech-Mozes S, Vitkin A, Khorasani M. Novel quantitative signature of tumor stromal architecture: polarized light imaging differentiates between myxoid and sclerotic human breast cancer stroma. BIOMEDICAL OPTICS EXPRESS 2020; 11:3246-3262. [PMID: 32637252 PMCID: PMC7316019 DOI: 10.1364/boe.392722] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/12/2020] [Accepted: 05/14/2020] [Indexed: 05/02/2023]
Abstract
As a leading cause of death in women, breast cancer is a global health concern for which personalized therapy remains largely unrealized, resulting in over- or under-treatment. Recently, tumor stroma has been shown to carry important prognostic information, both in its relative abundance and morphology, but its current assessment methods are few and suboptimal. Herein, we present a novel stromal architecture signature (SAS) methodology based on polarized light imaging that quantifies patterns of tumor connective tissue. We demonstrate its ability to differentiate between myxoid and sclerotic stroma, two pathology-derived categories associated with significantly different patient outcomes. The results demonstrate a 97% sensitivity and 88% specificity for myxoid stroma identification in a pilot study of 102 regions of interest from human invasive ductal carcinoma breast cancer surgical specimens (20 patients). Additionally, the SAS numerical score is indicative of the wide range of stromal characteristics within these binary classes and highlights ambiguous mixed-morphology regions prone to misclassification. The enabling polarized light microscopy technique is inexpensive, fast, fully automatable, applicable to fresh or embedded tissue without the need for staining and thus potentially translatable into research and/or clinical settings. The SAS metric yields quantifiable and objective stromal characterization with promise for prognosis in many types of cancers beyond breast carcinoma, enabling researchers and clinicians to further investigate the emerging and important role of stromal architectural patterns in solid tumors.
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Affiliation(s)
- Blake Jones
- Department of Medical Biophysics, University of Toronto, 101 College St, Toronto, ON M5G 1L7, Canada
- Authors contributed equally
| | - Georgia Thomas
- Department of Medical Biophysics, University of Toronto, 101 College St, Toronto, ON M5G 1L7, Canada
- Authors contributed equally
| | - Jared Westreich
- Department of Medical Biophysics, University of Toronto, 101 College St, Toronto, ON M5G 1L7, Canada
| | - Sharon Nofech-Mozes
- Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Cir, Toronto, ON M5S 1A8, Canada
| | - Alex Vitkin
- Department of Medical Biophysics, University of Toronto, 101 College St, Toronto, ON M5G 1L7, Canada
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Center, University Health Network, 610 University Ave, Toronto, ON M5G 2C1, Canada
- Department of Radiation Oncology, University of Toronto, Stewart building, 149 College St Suite 504, Toronto, ON M5 T 1P5, Canada
- Co-senior authors
| | - Mohammadali Khorasani
- Department of Surgical Oncology, University of Toronto, Princess Margaret Cancer Center, OPG Wing, 6th floor, 610 University Avenue Toronto, ON M5G 2M9, Canada
- Co-senior authors
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11
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Chacko JV, Eliceiri KW. NAD(P)H fluorescence lifetime measurements in fixed biological tissues. Methods Appl Fluoresc 2019; 7:044005. [PMID: 31553966 DOI: 10.1088/2050-6120/ab47e5] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Autofluorescence based fluorescence lifetime imaging microscopy (AF-FLIM) techniques have come a long way from early studies on cancer characterization and have now been widely employed in several cellular and animal studies covering a wide range of diseases. The majority of research in autofluorescence imaging (AFI) study metabolic fluxes in live biological samples. However, tissues from clinical or scientific studies are often chemically fixed for preservation and stabilization of tissue morphology. Fixation is particularly crucial for enzymatic, functional, or histopathology studies. Interpretations of metabolic imaging such as optical redox intensity imaging and AF-FLIM, have often been viewed as potentially unreliable in a fixed sample due to lack of studies in this field. In this study, we carefully evaluate the possibility of extracting microenvironment information in fixed tissues using reduced nicotinamide adenine dinucleotide (phosphate) (NAD(P)H) endogenous fluorescence. The ability to distinguish changes such as metabolism and pH using intrinsic fluorescence in fixed tissues has great pathological value. In this work, we show that the lifetime based metabolic contrast in a sample is preserved after chemical fixation. The fluorescence lifetime of a sample increases with an additive fixative like formaldehyde; however, the fixed tissues retain metabolic signatures even after fixation. This study presents an opportunity to successfully image archived unstained histopathology tissues, and generate useful AF-FLIM signatures. We demonstrate the capability to draw metabolic interpretations in fixed tissues even after long periods of storage.
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Affiliation(s)
- Jenu V Chacko
- Laboratory for Optical and Computational Instrumentation, U. Wisconsin at Madison, Madison WI, United States of America
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12
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Westreich J, Khorasani M, Jones B, Demidov V, Nofech-Mozes S, Vitkin A. Novel methodology to image stromal tissue and assess its morphological features with polarized light: towards a tumour microenvironment prognostic signature. BIOMEDICAL OPTICS EXPRESS 2019; 10:3963-3973. [PMID: 31452988 PMCID: PMC6701544 DOI: 10.1364/boe.10.003963] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/26/2019] [Accepted: 06/24/2019] [Indexed: 05/02/2023]
Abstract
The amount and organization details of peri-tumoural stroma have been linked to patient outcomes in various cancers. In this study, we propose a novel and relatively simple methodology using polarized light microscopy (PLM) to image fibrillar structures within a tumour microenvironment, using only linear crossed polarizers. We demonstrate the technique's ability to image and extract measurement-geometry-independent quantitative morphological metrics related to stromal density and alignment in human invasive breast cancer samples. The findings are promising towards quantitative characterization of peri-tumoural stroma, with potential to develop a PLM signature of tumour microenvironment for providing clinically important information such as breast cancer behaviour or treatment outcome prognosis.
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Affiliation(s)
- Jared Westreich
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Mohammadali Khorasani
- Fellow, Department of General Surgical Oncology, University of Toronto, Toronto, Canada
| | - Blake Jones
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Valentin Demidov
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Sharon Nofech-Mozes
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | - Alex Vitkin
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Canada
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13
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Liang D, Taeschler D, Goepfert C, Arnold P, Zurbuchen A, Sweda R, Reichlin T, Tanner H, Roten L, Haeberlin A. Radiofrequency ablation lesion assessment using optical coherence tomography - a proof-of-concept study. J Cardiovasc Electrophysiol 2019; 30:934-940. [PMID: 30883977 DOI: 10.1111/jce.13917] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/06/2019] [Accepted: 03/10/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Radiofrequency catheter ablation (RFA) is an effective treatment for atrial fibrillation. However, ablation lesions are usually only assessed functionally. The immediate effect of RFA on the tissue is not directly visualized. Optical coherence tomography (OCT) is an imaging technique that uses light to capture high-resolution images with histology-like quality. Therefore, it might be used for high-precision imaging of ablation lesions. METHODS AND RESULTS Radiofrequency ablation lesions (n = 25) were produced on the freshly excised left and right ventricular porcine endocardium. A Thermocool ST SF NAV ablation catheter (Biosense Webster Inc) and an EP-Shuttle ablation generator (Stockert GmbH) were used to produce ablation lesions with powers from 10 to 40 W (energies ranging from 100 Ws to 900 Ws). After ablation, the tissue was imaged with a swept source OCT system (at a wavelength of 1300 nm). Subsequently, the ablation lesions underwent the histological analysis. The ablation lesions could be visualized by OCT in all 17 samples with ablation powers ≥20 W, meanwhile, no lesion could be observed in the other eight samples with lower power (10 W). Lesion depths and lesion radiuses, as assessed by OCT, correlated well with those observed on the subsequent histological analysis (Spearman's r = 0.94, P < 0.001 and r = 0.84, P < 0.001). In addition, successful three-dimensional reconstructions of ablation lesions were performed. CONCLUSION OCT can provide a visual high-resolution assessment of ablation lesions.
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Affiliation(s)
- Deming Liang
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland
| | - Dominik Taeschler
- HuCE - optoLab, Bern University of Applied Sciences, Biel, Switzerland
| | - Christine Goepfert
- COMPATH, Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Patrik Arnold
- HuCE - optoLab, Bern University of Applied Sciences, Biel, Switzerland
| | - Adrian Zurbuchen
- SITEM - Swiss Institute for Translational and Entrepreneurial Medicine, Bern, Switzerland
| | - Romy Sweda
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Tobias Reichlin
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Hildegard Tanner
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Laurent Roten
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Andreas Haeberlin
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland.,SITEM - Swiss Institute for Translational and Entrepreneurial Medicine, Bern, Switzerland.,Department of Cardiology, Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
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14
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Chue-Sang J, Gonzalez M, Pierre A, Laughrey M, Saytashev I, Novikova T, Ramella-Roman JC. Optical phantoms for biomedical polarimetry: a review. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-12. [PMID: 30851015 PMCID: PMC6975228 DOI: 10.1117/1.jbo.24.3.030901] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 01/29/2019] [Indexed: 05/04/2023]
Abstract
Calibration, quantification, and standardization of the polarimetric instrumentation, as well as interpretation and understanding of the obtained data, require the development and use of well-calibrated phantoms and standards. We reviewed the status of tissue phantoms for a variety of applications in polarimetry; more than 500 papers are considered. We divided the phantoms into five groups according to their origin (biological/nonbiological) and fundamental polarimetric properties of retardation, depolarization, and diattenuation. We found that, while biological media are generally depolarizing, retarding, and diattenuating, only one of all the phantoms reviewed incorporated all these properties, and few considered at least combined retardation and depolarization. Samples derived from biological tissue, such as tendon and muscle, remain extremely popular to quickly ascertain a polarimetric system, but do not provide quantifiable results aside from relative direction of their principal optical axis. Microspheres suspensions are the most utilized phantoms for depolarization, and combined with theoretical models can offer true quantification of depolarization or degree of polarization. There is a real paucity of birefringent phantoms despite the retardance being one of the most interesting parameters measurable with polarization techniques. Therefore, future work should be directed at generating truly reliable and repeatable phantoms for this metric determination. Diattenuating phantoms are rare and application-specific. Given that diattenuation is considered to be low in most biological tissues, the lack of such phantoms is seen as less problematic. The heterogeneity of the phantoms reviewed points to a critical need for standardization in this field. Ultimately, all research groups involved in polarimetric studies and instruments development would benefit from sharing a limited set of standardized polarimetric phantoms, as is done earlier in the round robin investigations in ellipsometry.
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Affiliation(s)
- Joseph Chue-Sang
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Mariacarla Gonzalez
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Angie Pierre
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Megan Laughrey
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Ilyas Saytashev
- Florida International University, Herbert Wertheim College of Medicine, Miami, Florida, United States
| | - Tatiana Novikova
- LPICM Laboratoire de Physique des Interfaces et Couches Minces, CNRS, Ecole Polytechnique, Palaiseau, France
| | - Jessica C. Ramella-Roman
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
- Florida International University, Herbert Wertheim College of Medicine, Miami, Florida, United States
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15
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Fung KLB, Samim M, Gribble A, Barzda V, Vitkin IA. Monte Carlo simulation of polarization-sensitive second-harmonic generation and propagation in biological tissue. JOURNAL OF BIOPHOTONICS 2018; 11:e201800036. [PMID: 29971932 DOI: 10.1002/jbio.201800036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 07/01/2018] [Indexed: 06/08/2023]
Abstract
Polarization-sensitive second harmonic generation (p-SHG) is a nonlinear optical microscopy technique that has shown great promise in biomedicine, such as in detecting changes in the collagen ultrastructure of the tumor microenvironment. However, the complex nature of light-tissue interactions and the heterogeneity of biological samples pose challenges in creating an analytical and experimental quantification platform for tissue characterization via p-SHG. We present a Monte Carlo (MC) p-SHG simulation model based on double Stokes-Mueller polarimetry for the investigation of nonlinear light-tissue interaction. The MC model predictions are compared with experimental measurements of second-order nonlinear susceptibility component ratio and degree of polarization (DOP) in rat-tail collagen. The observed trends in the behavior of these parameters as a function of tissue thickness, as well as the overall extent of agreement between MC and experimental results, are discussed. High sensitivities of the susceptibility ratio and DOP are observed for the varying tissue thickness on the incoming fundamental light propagation pathway.
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Affiliation(s)
- K L Barry Fung
- Division of Engineering Science, University of Toronto, Toronto, Ontario, Canada
| | - Masood Samim
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Adam Gribble
- Department of Medical Biophysics, University of Toronto, Ontario, Canada
| | - Virginijus Barzda
- Department of Chemical and Physical Sciences, University of Toronto Mississauga, Mississauga, Ontario, Canada
- Department of Physics, University of Toronto, Toronto, Ontario, Canada
| | - I Alex Vitkin
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Ontario, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada
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16
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Flexible polarimetric probe for 3 × 3 Mueller matrix measurements of biological tissue. Sci Rep 2017; 7:11958. [PMID: 28931853 PMCID: PMC5607295 DOI: 10.1038/s41598-017-12099-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 09/04/2017] [Indexed: 12/20/2022] Open
Abstract
Polarimetry is a noninvasive method that uses polarised light to assess biophysical characteristics of tissues. A series of incident polarisation states illuminates a biological sample, and analysis of sample-altered polarisation states enables polarimetric tissue assessment. The resultant information can, for example, help quantitatively differentiate healthy from pathologic tissue. However, most bio-polarimetric assessments are performed using free-space optics with bulky optical components. Extension to flexible fibre-based systems is clinically desirable, but is challenging due to polarisation-altering properties of optical fibres. Here, we propose a flexible fibre-based polarimetric solution, and describe its design, fabrication, calibration, and initial feasibility demonstration in ex vivo tissue. The design is based on a flexible fibre bundle of six multimode optical fibres, each terminated with a distal polariser that ensures pre-determined output polarisation states. The resultant probe enables linear 3 × 3 Mueller matrix characterization of distal tissue. Potential in vivo Mueller matrix polarimetric tissue examinations in various directly-inaccessible body cavities are envisioned.
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17
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Chue-Sang J, Bai Y, Stoff S, Gonzalez M, Holness N, Gomes J, Jung R, Gandjbakhche A, Chernomordik VV, Ramella-Roman JC. Use of Mueller matrix polarimetry and optical coherence tomography in the characterization of cervical collagen anisotropy. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-9. [PMID: 28853246 PMCID: PMC5997002 DOI: 10.1117/1.jbo.22.8.086010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 07/24/2017] [Indexed: 05/20/2023]
Abstract
Preterm birth (PTB) presents a serious medical health concern throughout the world. There is a high incidence of PTB in both developed and developing countries ranging from 11% to 15%, respectively. Recent research has shown that cervical collagen orientation and distribution changes during pregnancy may be useful in predicting PTB. Polarization imaging is an effective means to measure optical anisotropy in birefringent materials, such as the cervix's extracellular matrix. Noninvasive, full-field Mueller matrix polarimetry (MMP) imaging methodologies, and optical coherence tomography (OCT) imaging were used to assess cervical collagen content and structure in nonpregnant porcine cervices. We demonstrate that the highly ordered structure of the nonpregnant porcine cervix can be observed with MMP. Furthermore, when utilized ex vivo, OCT and MMP yield very similar results with a mean error of 3.46% between the two modalities.
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Affiliation(s)
- Joseph Chue-Sang
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Yuqiang Bai
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Susan Stoff
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Mariacarla Gonzalez
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Nola Holness
- Florida International University, Nicole Wertheim College of Nursing and Health Sciences, Miami, Florida, United States
| | - Jefferson Gomes
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Ranu Jung
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Amir Gandjbakhche
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, Rockville, Maryland, United States
| | - Viktor V. Chernomordik
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, Rockville, Maryland, United States
| | - Jessica C. Ramella-Roman
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
- Florida International University, Herbert Wertheim College of Medicine, Miami, Florida, United States
- Address all correspondence to: Jessica C. Ramella-Roman, E-mail:
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18
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Ahmad I, Gribble A, Murtza I, Ikram M, Pop M, Vitkin A. Polarization image segmentation of radiofrequency ablated porcine myocardial tissue. PLoS One 2017; 12:e0175173. [PMID: 28380013 PMCID: PMC5381909 DOI: 10.1371/journal.pone.0175173] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 03/21/2017] [Indexed: 11/19/2022] Open
Abstract
Optical polarimetry has previously imaged the spatial extent of a typical radiofrequency ablated (RFA) lesion in myocardial tissue, exhibiting significantly lower total depolarization at the necrotic core compared to healthy tissue, and intermediate values at the RFA rim region. Here, total depolarization in ablated myocardium was used to segment the total depolarization image into three (core, rim and healthy) zones. A local fuzzy thresholding algorithm was used for this multi-region segmentation, and then compared with a ground truth segmentation obtained from manual demarcation of RFA core and rim regions on the histopathology image. Quantitative comparison of the algorithm segmentation results was performed with evaluation metrics such as dice similarity coefficient (DSC = 0.78 ± 0.02 and 0.80 ± 0.02), sensitivity (Sn = 0.83 ± 0.10 and 0.91 ± 0.08), specificity (Sp = 0.76 ± 0.17 and 0.72 ± 0.17) and accuracy (Acc = 0.81 ± 0.09 and 0.71 ± 0.10) for RFA core and rim regions, respectively. This automatic segmentation of parametric depolarization images suggests a novel application of optical polarimetry, namely its use in objective RFA image quantification.
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Affiliation(s)
- Iftikhar Ahmad
- Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Science (PIEAS), Nilore, Islamabad, Pakistan
- * E-mail:
| | - Adam Gribble
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Toronto, Ontario, Canada
| | - Iqbal Murtza
- Department of Computer and Information Sciences, Pakistan Institute of Engineering and Applied Science (PIEAS), Nilore, Islamabad, Pakistan
| | - Masroor Ikram
- Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Science (PIEAS), Nilore, Islamabad, Pakistan
| | - Mihaela Pop
- Sunnybrook Research Institute, Department of Medical Biophysics, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario, Canada
| | - Alex Vitkin
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Toronto, Ontario, Canada
- Department of Radiation Oncology, University of Toronto, 610 University Avenue, Toronto, Ontario Canada
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19
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Baumann B, Woehrer A, Ricken G, Augustin M, Mitter C, Pircher M, Kovacs GG, Hitzenberger CK. Visualization of neuritic plaques in Alzheimer's disease by polarization-sensitive optical coherence microscopy. Sci Rep 2017; 7:43477. [PMID: 28262719 PMCID: PMC5337955 DOI: 10.1038/srep43477] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 01/24/2017] [Indexed: 12/16/2022] Open
Abstract
One major hallmark of Alzheimer's disease (AD) and cerebral amyloid angiopathy (CAA) is the deposition of extracellular senile plaques and vessel wall deposits composed of amyloid-beta (Aβ). In AD, degeneration of neurons is preceded by the formation of Aβ plaques, which show different morphological forms. Most of them are birefringent owing to the parallel arrangement of amyloid fibrils. Here, we present polarization sensitive optical coherence microscopy (PS-OCM) for imaging mature neuritic Aβ plaques based on their birefringent properties. Formalin-fixed, post-mortem brain samples of advanced stage AD patients were investigated. In several cortical brain regions, neuritic Aβ plaques were successfully visualized in tomographic and three-dimensional (3D) images. Cortical grey matter appeared polarization preserving, whereas neuritic plaques caused increased phase retardation. Consistent with the results from PS-OCM imaging, the 3D structure of senile Aβ plaques was computationally modelled for different illumination settings and plaque sizes. Furthermore, the birefringent properties of cortical and meningeal vessel walls in CAA were investigated in selected samples. Significantly increased birefringence was found in smaller vessels. Overall, these results provide evidence that PS-OCM is able to assess amyloidosis based on intrinsic birefringent properties.
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Affiliation(s)
- Bernhard Baumann
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, A-1090, Vienna, Austria
| | - Adelheid Woehrer
- General Hospital and Medical University of Vienna, Institute of Neurology, A-1090, Vienna, Austria
| | - Gerda Ricken
- General Hospital and Medical University of Vienna, Institute of Neurology, A-1090, Vienna, Austria
| | - Marco Augustin
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, A-1090, Vienna, Austria
| | - Christian Mitter
- General Hospital and Medical University of Vienna, Institute of Neurology, A-1090, Vienna, Austria
- General Hospital and Medical University of Vienna, Department of Biomedical Imaging and Image-guided Therapy, A-1090, Vienna, Austria
| | - Michael Pircher
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, A-1090, Vienna, Austria
| | - Gabor G. Kovacs
- General Hospital and Medical University of Vienna, Institute of Neurology, A-1090, Vienna, Austria
| | - Christoph K. Hitzenberger
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, A-1090, Vienna, Austria
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20
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Tang Q, Wang J, Frank A, Lin J, Li Z, Chen CW, Jin L, Wu T, Greenwald BD, Mashimo H, Chen Y. Depth-resolved imaging of colon tumor using optical coherence tomography and fluorescence laminar optical tomography. BIOMEDICAL OPTICS EXPRESS 2016; 7:5218-5232. [PMID: 28018738 PMCID: PMC5175565 DOI: 10.1364/boe.7.005218] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 11/16/2016] [Accepted: 11/16/2016] [Indexed: 05/02/2023]
Abstract
Early detection of neoplastic changes remains a critical challenge in clinical cancer diagnosis and treatment. Many cancers arise from epithelial layers such as those of the gastrointestinal (GI) tract. Current standard endoscopic technology is difficult to detect the subsurface lesions. In this research, we investigated the feasibility of a novel multi-modal optical imaging approach including high-resolution optical coherence tomography (OCT) and high-sensitivity fluorescence laminar optical tomography (FLOT) for structural and molecular imaging. The C57BL/6J-ApcMin/J mice were imaged using OCT and FLOT, and the correlated histopathological diagnosis was obtained. Quantitative structural (scattering coefficient) and molecular (relative enzyme activity) parameters were obtained from OCT and FLOT images for multi-parametric analysis. This multi-modal imaging method has demonstrated the feasibility for more accurate diagnosis with 88.23% (82.35%) for sensitivity (specificity) compared to either modality alone. This study suggested that combining OCT and FLOT is promising for subsurface cancer detection, diagnosis, and characterization.
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Affiliation(s)
- Qinggong Tang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Jianting Wang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Aaron Frank
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Jonathan Lin
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Zhifang Li
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
- Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350007, China
| | - Chao-wei Chen
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Lily Jin
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Tongtong Wu
- Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY 14642, USA
| | - Bruce D. Greenwald
- Division of Gastroenterology and Hepatology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Hiroshi Mashimo
- Department of Medicine, Veterans Affairs Boston Healthcare System, Harvard Medical School, West Roxbury, MA 02132, USA
| | - Yu Chen
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
- Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350007, China
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21
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Rehbinder J, Haddad H, Deby S, Teig B, Nazac A, Novikova T, Pierangelo A, Moreau F. Ex vivo Mueller polarimetric imaging of the uterine cervix: a first statistical evaluation. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:71113. [PMID: 27108592 DOI: 10.1117/1.jbo.21.7.071113] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 03/01/2016] [Indexed: 05/18/2023]
Abstract
Early detection through screening plays a major role in reducing the impact of cervical cancer on patients. When detected before the invasive stage, precancerous lesions can be eliminated with very limited surgery. Polarimetric imaging is a potential alternative to the standard screening methods currently used. In a previous proof-of-concept study, significant contrasts have been found in polarimetric images acquired for healthy and precancerous regions of excised cervical tissue. To quantify the ability of the technique to differentiate between healthy and precancerous tissue, polarimetric images of seventeen cervical conization specimens (cone-shaped or cylindrical wedges from the uterine cervix) are compared with results from histopathological diagnoses, which is considered to be the “gold standard.” The sensitivity and specificity of the technique are calculated for images acquired at wavelengths of 450, 550, and 600 nm, aiming to differentiate between high-grade cervical intraepithelial neoplasia (CIN 2-3) and healthy squamous epithelium. To do so, a sliding threshold for the scalar retardance parameter was used for the sample zones, as labeled after histological diagnosis. An optimized value of ∼83% is achieved for both sensitivity and specificity for images acquired at 450 nm and for a threshold scalar retardance value of 10.6 deg. This study paves the way for an application of polarimetry in the clinic.
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Affiliation(s)
- Jean Rehbinder
- Laboratoire de Physique des Interfaces et des Couches Minces, CNRS, Ecole polytechnique, Université Paris-Saclay, Route de Saclay, Palaiseau 91128, France
| | - Huda Haddad
- Tafila Technical University, Applied Physics Department, Faculty of Science, P.O. Box 179, Tafila 66110, Jordan
| | - Stanislas Deby
- Laboratoire de Physique des Interfaces et des Couches Minces, CNRS, Ecole polytechnique, Université Paris-Saclay, Route de Saclay, Palaiseau 91128, France
| | - Benjamin Teig
- CHU de Bicêtre AP-HP, Service d'anatomie pathologique, 78 rue du Général Leclerc, Le Kremlin-Bicêtre 94270, France
| | - André Nazac
- CHU de Bicêtre AP-HP, Service de Gynécologie Obstétrique, 78 rue du Général Leclerc, Le Kremlin-Bicêtre 94270, FranceeUniversité Libre de Bruxelles, University Hospital Brugmann, Department of Obstetrics and Gynecology, Place A. Van Gehuchten 4, Brussels
| | - Tatiana Novikova
- Laboratoire de Physique des Interfaces et des Couches Minces, CNRS, Ecole polytechnique, Université Paris-Saclay, Route de Saclay, Palaiseau 91128, France
| | - Angelo Pierangelo
- Laboratoire de Physique des Interfaces et des Couches Minces, CNRS, Ecole polytechnique, Université Paris-Saclay, Route de Saclay, Palaiseau 91128, France
| | - François Moreau
- Laboratoire de Physique des Interfaces et des Couches Minces, CNRS, Ecole polytechnique, Université Paris-Saclay, Route de Saclay, Palaiseau 91128, France
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22
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Ahmad I, Gribble A, Ikram M, Pop M, Vitkin A. Polarimetric assessment of healthy and radiofrequency ablated porcine myocardial tissue. JOURNAL OF BIOPHOTONICS 2016; 9:750-9. [PMID: 26394151 DOI: 10.1002/jbio.201500184] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 08/18/2015] [Accepted: 08/25/2015] [Indexed: 05/02/2023]
Abstract
Radiofrequency (RF) ablation offers a potential treatment for cardiac arrhythmia, where properly titrated energy delivered at critical sites can destroy arrhythmogenic foci. The resulting ablation lesion typically consists of a core (coagulative necrosis) surrounded by a rim of mixed viable and non-viable cells. The extent of the RF lesion is difficult to delineate with current imaging techniques. Here, we explore polarization signatures of ten ex-vivo samples from untreated (n = 5) and RF ablated porcine hearts (n = 5), in backscattered geometry through Mueller matrix polarimetry. Significant differences (p < 0.01) in depolarization, ΔT , were observed between the healthy, RF ablated and rim regions. Linear retardance, δ, was significantly lower in the core and rim regions compared to healthy regions (p < 0.05). The results demonstrate a novel application of polarimetry, namely the characterization of RF ablation extent in myocardium, including the visualization of the important lesion rim region. White light photo (top) of porcine myocardium tissue with radiofrequency ablation lesion and corresponding depolarization map (bottom). Depolarization is useful for visualizing the lesion core and rim.
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Affiliation(s)
- Iftikhar Ahmad
- Pakistan Institute of Engineering and Applied Science (PIEAS), Nilore, 45650, Islamabad, Pakistan.
- Division of Biophysics and Bioimaging, Ontario Cancer Institute/University Health Network and Department of Medical Biophysics, University of Toronto, 101 College Street, Toronto, Ontario, M5G 1L7, Canada.
| | - Adam Gribble
- Division of Biophysics and Bioimaging, Ontario Cancer Institute/University Health Network and Department of Medical Biophysics, University of Toronto, 101 College Street, Toronto, Ontario, M5G 1L7, Canada.
| | - Masroor Ikram
- Pakistan Institute of Engineering and Applied Science (PIEAS), Nilore, 45650, Islamabad, Pakistan
| | - Mihaela Pop
- Sunnybrook Research Institute, Department of Medical Biophysics, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario, M4N 3M5, Canada
| | - Alex Vitkin
- Division of Biophysics and Bioimaging, Ontario Cancer Institute/University Health Network and Department of Medical Biophysics, University of Toronto, 101 College Street, Toronto, Ontario, M5G 1L7, Canada
- Department of Radiation Oncology, University of Toronto, 610 University Avenue, Toronto, Ontario, M5G 2M9, Canada
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23
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Jan NJ, Grimm JL, Tran H, Lathrop KL, Wollstein G, Bilonick RA, Ishikawa H, Kagemann L, Schuman JS, Sigal IA. Polarization microscopy for characterizing fiber orientation of ocular tissues. BIOMEDICAL OPTICS EXPRESS 2015; 6:4705-18. [PMID: 26713188 PMCID: PMC4679248 DOI: 10.1364/boe.6.004705] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 10/01/2015] [Accepted: 10/30/2015] [Indexed: 05/03/2023]
Abstract
Characterizing the collagen fiber orientation and organization in the eye is necessary for a complete understanding of ocular biomechanics. In this study, we assess the performance of polarized light microscopy to determine collagen fiber orientation of ocular tissues. Our results demonstrate that the method provides objective, accurate, repeatable and robust data on fiber orientation with µm-scale resolution over a broad, cm-scale, field of view, unaffected by formalin fixation, without requiring tissue dehydration, labeling or staining. Together, this shows that polarized light microscopy is a powerful method for studying collagen architecture in the eye, with applications ranging from normal physiology and aging, to pathology and transplantation.
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Affiliation(s)
- Ning-Jiun Jan
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,
USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- The Louis J. Fox Center for Vision Restoration of UPMC and the University of Pittsburgh, Pittsburgh, PA,
USA
| | - Jonathan L. Grimm
- UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,
USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
| | - Huong Tran
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,
USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- The Louis J. Fox Center for Vision Restoration of UPMC and the University of Pittsburgh, Pittsburgh, PA,
USA
| | - Kira L. Lathrop
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,
USA
- The Louis J. Fox Center for Vision Restoration of UPMC and the University of Pittsburgh, Pittsburgh, PA,
USA
| | - Gadi Wollstein
- UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,
USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- The Louis J. Fox Center for Vision Restoration of UPMC and the University of Pittsburgh, Pittsburgh, PA,
USA
| | - Richard A. Bilonick
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
| | - Hiroshi Ishikawa
- UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,
USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- The Louis J. Fox Center for Vision Restoration of UPMC and the University of Pittsburgh, Pittsburgh, PA,
USA
| | - Larry Kagemann
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,
USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- The Louis J. Fox Center for Vision Restoration of UPMC and the University of Pittsburgh, Pittsburgh, PA,
USA
| | - Joel S. Schuman
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,
USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- The Louis J. Fox Center for Vision Restoration of UPMC and the University of Pittsburgh, Pittsburgh, PA,
USA
| | - Ian A. Sigal
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,
USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh, Pittsburgh, Pennsylvania,
USA
- The Louis J. Fox Center for Vision Restoration of UPMC and the University of Pittsburgh, Pittsburgh, PA,
USA
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24
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Pitzschke A, Lovisa B, Seydoux O, Haenggi M, Oertel MF, Zellweger M, Tardy Y, Wagnières G. Optical properties of rabbit brain in the red and near-infrared: changes observed under in vivo, postmortem, frozen, and formalin-fixated conditions. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:25006. [PMID: 25706688 DOI: 10.1117/1.jbo.20.2.025006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 01/29/2015] [Indexed: 05/05/2023]
Abstract
The outcome of light-based therapeutic approaches depends on light propagation in biological tissues, which is governed by their optical properties. The objective of this study was to quantify optical properties of brain tissue in vivo and postmortem and assess changes due to tissue handling postmortem. The study was carried out on eight female New Zealand white rabbits. The local fluence rate was measured in the VIS/NIR range in the brain in vivo, just postmortem, and after six weeks’ storage of the head at −20°C or in 10% formaldehyde solution. Only minimal changes in the effective attenuation coefficient μeff were observed for two methods of sacrifice, exsanguination or injection of KCl. Under all tissue conditions, μeff decreased with increasing wavelengths. After long-term storage for six weeks at −20°C, μeff decreased, on average, by 15 to 25% at all wavelengths, while it increased by 5 to 15% at all wavelengths after storage in formaldehyde. We demonstrated that μeff was not very sensitive to the method of animal sacrifice, that tissue freezing significantly altered tissue optical properties, and that formalin fixation might affect the tissue’s optical properties.)
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Affiliation(s)
- Andreas Pitzschke
- Swiss Federal Institute of Technology, Institute of Chemical Sciences and Engineering, Station 6, Lausanne CH-1015, Switzerland
| | - Blaise Lovisa
- Swiss Federal Institute of Technology, Institute of Chemical Sciences and Engineering, Station 6, Lausanne CH-1015, SwitzerlandbMedos International Sàrl, a J&J Company, Chemin Blanc 38, Le Locle CH-2400, Switzerland
| | - Olivier Seydoux
- Swiss Federal Institute of Technology, Institute of Chemical Sciences and Engineering, Station 6, Lausanne CH-1015, Switzerland
| | - Matthias Haenggi
- University of Bern, Department of Neurosurgery, Bern University Hospital, Inselspital, Bern CH-3010, Switzerland
| | - Markus F Oertel
- University of Bern, Department of Intensive Care Medicine, Bern University Hospital, Inselspital, Bern CH-3010, Switzerland
| | - Matthieu Zellweger
- Swiss Federal Institute of Technology, Institute of Chemical Sciences and Engineering, Station 6, Lausanne CH-1015, Switzerland
| | - Yanik Tardy
- Medos International Sàrl, a J&J Company, Chemin Blanc 38, Le Locle CH-2400, Switzerland
| | - Georges Wagnières
- Swiss Federal Institute of Technology, Institute of Chemical Sciences and Engineering, Station 6, Lausanne CH-1015, Switzerland
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25
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Low JCM, Ober TJ, McKinley GH, Stankovic KM. Quantitative polarized light microscopy of human cochlear sections. BIOMEDICAL OPTICS EXPRESS 2015; 6:599-606. [PMID: 25780749 PMCID: PMC4354578 DOI: 10.1364/boe.6.000599] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 01/13/2015] [Indexed: 05/31/2023]
Abstract
Dysfunction of the inner ear is the most common cause of sensorineural hearing loss, which is the most common sensory deficit worldwide. Conventional imaging modalities are unable to depict the microanatomy of the human inner ear, hence the need to explore novel imaging modalities. We provide the first characterization of the polarization dependent optical properties of human cochlear sections using quantitative polarized light microscopy (qPLM). Eight pediatric cadaveric cochlear sections, aged 0 (term) to 24 months, were selected from the US National Temporal Bone Registry, imaged with qPLM and analyzed using Image J. Retardance of the bony otic capsule and basilar membrane were substantially higher than that of the stria vascularis, spiral ganglion neurons, organ of Corti and spiral ligament across the half turns of the spiraling cochlea. qPLM provides quantitative information about the human inner ear, and awaits future exploration in vivo.
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Affiliation(s)
- Jacob C. M. Low
- The University of Manchester, Oxford Road, Manchester, M13 9PL,
UK
| | - Thomas J. Ober
- Massachusetts Institute of Technology, Department of Mechanical Engineering, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139,
USA
| | - Gareth H. McKinley
- Massachusetts Institute of Technology, Department of Mechanical Engineering, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139,
USA
| | - Konstantina M. Stankovic
- Massachusetts Eye and Ear Infirmary, Department of Otolaryngology and Eaton Peabody Laboratories, 243 Charles Street, Boston, Massachusetts 02114,
USA
- Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts,
USA
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26
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Alali S, Ahmad M, Kim A, Vurgun N, Wood MFG, Vitkin IA. Quantitative correlation between light depolarization and transport albedo of various porcine tissues. JOURNAL OF BIOMEDICAL OPTICS 2012; 17:045004. [PMID: 22559678 DOI: 10.1117/1.jbo.17.4.045004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We present a quantitative study of depolarization in biological tissues and correlate it with measured optical properties (reduced scattering and absorption coefficients). Polarized light imaging was used to examine optically thick samples of both isotropic (liver, kidney cortex, and brain) and anisotropic (cardiac muscle, loin muscle, and tendon) pig tissues in transmission and reflection geometries. Depolarization (total, linear, and circular), as derived from polar decomposition of the measured tissue Mueller matrix, was shown to be related to the measured optical properties. We observed that depolarization increases with the transport albedo for isotropic and anisotropic tissues, independent of measurement geometry. For anisotropic tissues, depolarization was higher compared to isotropic tissues of similar transport albedo, indicating birefringence-caused depolarization effects. For tissues with large transport albedos (greater than ~0.97), backscattering geometry was preferred over transmission due to its greater retention of light polarization; this was not the case for tissues with lower transport albedo. Preferential preservation of linearly polarized light over circularly polarized light was seen in all tissue types and all measurement geometries, implying the dominance of Rayleigh-like scattering. The tabulated polarization properties of different tissue types and their links to bulk optical properties should prove useful in future polarimetric tissue characterization and imaging studies.
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Affiliation(s)
- Sanaz Alali
- Ontario Cancer Institute/University Health Network and Department of Medical Biophysics, Division of Biophysics and Bioimaging, University of Toronto, Toronto, Ontario, Canada.
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