1
|
Ramella-Roman JC, Mahendroo M, Raoux C, Latour G, Schanne-Klein MC. Quantitative Assessment of Collagen Remodeling during a Murine Pregnancy. ACS PHOTONICS 2024; 11:3536-3544. [PMID: 39310300 PMCID: PMC11413848 DOI: 10.1021/acsphotonics.4c00337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 07/23/2024] [Accepted: 07/29/2024] [Indexed: 09/25/2024]
Abstract
Uterine cervical remodeling is a fundamental feature of pregnancy, facilitating the delivery of the fetus through the cervical canal. Yet, we still know very little about this process due to the lack of methodologies that can quantitatively and unequivocally pinpoint the changes the cervix undergoes during pregnancy. We utilize polarization-resolved second harmonic generation to visualize the alterations the cervix extracellular matrix, specifically collagen, undergoes during pregnancy with exquisite resolution. This technique provides images of the collagen orientation at the pixel level (0.4 μm) over the entire murine cervical section. They show tight and ordered packing of collagen fibers around the os at the early stage of pregnancy and their disruption at the later stages. Furthermore, we utilize a straightforward statistical analysis to demonstrate the loss of order in the tissue, consistent with the loss of mechanical properties associated with this process. This work provides a deeper understanding of the parturition process and could support research into the cause of pathological or premature birth.
Collapse
Affiliation(s)
- Jessica C. Ramella-Roman
- Biomedical
Engineering Department, Florida International
University, Miami, Florida 33174, United States
| | - Mala Mahendroo
- Department
of Obstetrics and Gynecology, University
of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Clothilde Raoux
- Laboratory
for Optics and Biosciences (LOB), École Polytechnique, CNRS,
Inserm, Institut Polytechnique de Paris, Palaiseau 91120, France
| | - Gaël Latour
- Laboratory
for Optics and Biosciences (LOB), École Polytechnique, CNRS,
Inserm, Institut Polytechnique de Paris, Palaiseau 91120, France
- Université
Paris-Saclay, Gif-sur-Yvette 91190, France
| | - Marie-Claire Schanne-Klein
- Laboratory
for Optics and Biosciences (LOB), École Polytechnique, CNRS,
Inserm, Institut Polytechnique de Paris, Palaiseau 91120, France
| |
Collapse
|
2
|
Novikova T, Ovchinnikov A, Pogudin G, Ramella-Roman JC. Time-efficient filtering of imaging polarimetric data by checking physical realizability of experimental mueller matrices. Bioinformatics 2024; 40:btae348. [PMID: 38830086 PMCID: PMC11283285 DOI: 10.1093/bioinformatics/btae348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 05/01/2024] [Accepted: 05/31/2024] [Indexed: 06/05/2024] Open
Abstract
MOTIVATION Imaging Mueller polarimetry has already proved its potential for biomedicine, remote sensing and metrology. The real-time applications of this modality require both video rate image acquisition and fast data post-processing algorithms. First, one must check the physical realizability of the experimental Mueller matrices in order to filter out non-physical data, ie to test the positive semi-definiteness of the 4 × 4 Hermitian coherency matrix calculated from the elements of corresponding Mueller matrix pixel-wise. For this purpose, we compared the execution time for the calculations of i) eigenvalues, ii) Cholesky decomposition, iii) Sylvester's criterion, and iv) coefficients of the characteristic polynomial (two different approaches) of the Hermitian coherency matrix, all calculated for the experimental Mueller matrix images (600 pixels × 700 pixels) of mouse uterine cervix. The calculations were performed using C ++ and Julia programming languages. RESULTS Our results showed the superiority of the algorithm iv) based on the simplification via Pauli matrices over other algorithms for our dataset. The sequential implementation of latter algorithm on a single core already satisfies the requirements of real-time polarimetric imaging. This can be further amplified by the proposed parallelization (e.g., we achieve a 5-fold speed up on 6 cores). AVAILABILITY AND IMPLEMENTATION The source codes of the algorithms and experimental data are available at https://github.com/pogudingleb/mueller_matrices.
Collapse
Affiliation(s)
- Tatiana Novikova
- LPICM, CNRS, Ecole Polytechnique, IP Paris, Palaiseau, 91120, France
- Department of Biomedical Engineering, Florida International University, Miami, FL , 33174, United States
| | - Alexey Ovchinnikov
- Department of Mathematics, CUNY Queens College, 65-30 Kissena Blvd, Queens, NY, 11367, United States
- Ph.D. Programs in Mathematics and Computer Science, CUNY Graduate Center, 365 Fifth Avenue, New York, NY, 10016, United States
| | - Gleb Pogudin
- Laboratoire d’informatique, CNRS, Ecole Polytechnique, IP Paris, Palaiseau, 91120, France
| | - Jessica C Ramella-Roman
- Department of Biomedical Engineering, Florida International University, Miami, FL , 33174, United States
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL, 33199, United States
| |
Collapse
|
3
|
Boonya-ananta T, Gonzalez M, Ajmal A, Du Le VN, DeHoog E, Paidas MJ, Jayakumar A, Ramella-Roman JC. Speculum-free portable preterm imaging system. JOURNAL OF BIOMEDICAL OPTICS 2024; 29:052918. [PMID: 38282917 PMCID: PMC10821769 DOI: 10.1117/1.jbo.29.5.052918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/02/2024] [Accepted: 01/05/2024] [Indexed: 01/30/2024]
Abstract
Significance Preterm birth is defined as a birth before 37 weeks of gestation and is one of the leading contributors to infant mortality rates globally. Premature birth can lead to life-long developmental impairment for the child. Unfortunately, there is a significant lack of tools to diagnose preterm birth risk, which limits patient care and the development of new therapies. Aim To develop a speculum-free, portable preterm imaging system (PPRIM) for cervical imaging; testing of the PPRIM system to resolve polarization properties of birefringent samples; and testing of the PPRIM under an IRB on healthy, non-pregnant volunteers for visualization and polarization analysis of cervical images. Approach The PPRIM can perform 4 × 3 Mueller-matrix imaging to characterize the remodeling of the uterine cervix during pregnancy. The PPRIM is built with a polarized imaging probe and a flexible insertable sheath made with a compatible flexible rubber-like material to maximize comfort and ease of use. Results The PPRIM device is developed to meet specific design specifications as a speculum-free, portable, and comfortable imaging system with polarized imaging capabilities. This system comprises a main imaging component and a flexible silicone inserter. The inserter is designed to maximize comfort and usability for the patient. The PPRIM shows high-resolution imaging capabilities at the 20 mm working distance and 25 mm circular field of view. The PPRIM demonstrates the ability to resolve birefringent sample orientation and full field capture of a healthy, non-pregnant cervix. Conclusion The development of the PPRIM aims to improve access to the standard of care for women's reproductive health using polarized Mueller-matrix imaging of the cervix and reduce infant and maternal mortality rates and better quality of life.
Collapse
Affiliation(s)
- Tananant Boonya-ananta
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Mariacarla Gonzalez
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Ajmal Ajmal
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Vinh Nguyen Du Le
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Edward DeHoog
- Optical Design and Engineering, Long Beach, California, United States
| | - Michael J. Paidas
- Miller School of Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Miami, Florida, United States
| | - Arumugam Jayakumar
- Miller School of Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Miami, Florida, 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
| |
Collapse
|
4
|
Ivanov D, Si L, Felger L, Maragkou T, Schucht P, Schanne-Klein MC, Ma H, Ossikovski R, Novikova T. Impact of corpus callosum fiber tract crossing on polarimetric images of human brain histological sections: ex vivo studies in transmission configuration. JOURNAL OF BIOMEDICAL OPTICS 2023; 28:102908. [PMID: 37705930 PMCID: PMC10496857 DOI: 10.1117/1.jbo.28.10.102908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/20/2023] [Accepted: 08/17/2023] [Indexed: 09/15/2023]
Abstract
Significance Imaging Mueller polarimetry is capable to trace in-plane orientation of brain fiber tracts by detecting the optical anisotropy of white matter of healthy brain. Brain tumor cells grow chaotically and destroy this anisotropy. Hence, the drop in scalar retardance values and randomization of the azimuth of the optical axis could serve as the optical marker for brain tumor zone delineation. Aim The presence of underlying crossing fibers can also affect the values of scalar retardance and the azimuth of the optical axis. We studied and analyzed the impact of fiber crossing on the polarimetric images of thin histological sections of brain corpus callosum. Approach We used the transmission Mueller microscope for imaging of two-layered stacks of thin sections of corpus callosum tissue to mimic the overlapping brain fiber tracts with different fiber orientations. The decomposition of the measured Mueller matrices was performed with differential and Lu-Chipman algorithms and completed by the statistical analysis of the maps of scalar retardance, azimuth of the optical axis, and depolarization. Results Our results indicate the sensitivity of Mueller polarimetry to different spatial arrangement of brain fiber tracts as seen in the maps of scalar retardance and azimuth of optical axis of two-layered stacks of corpus callosum sections The depolarization varies slightly (< 15 % ) with the orientation of the optical axes in both corpus callosum stripes, but its value increases by 2.5 to 3 times with the stack thickness. Conclusions The crossing brain fiber tracts measured in transmission induce the drop in values of scalar retardance and randomization of the azimuth of the optical axis at optical path length of 15 μ m . It suggests that the presence of nerve fibers crossing within the depth of few microns will be also detected in polarimetric maps of brain white matter measured in reflection configuration.
Collapse
Affiliation(s)
- Deyan Ivanov
- Institut Polytechnique de Paris, École Polytechnique, CNRS, LPICM, Palaiseau, France
| | - Lu Si
- Tsinghua University, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, China
| | - Leonard Felger
- Bern University Hospital, University of Bern, Inselspital, Department of Neurosurgery, Bern, Switzerland
| | - Theoni Maragkou
- University of Bern, Institute of Tissue Medicine and Pathology, Bern, Switzerland
| | - Philippe Schucht
- Bern University Hospital, University of Bern, Inselspital, Department of Neurosurgery, Bern, Switzerland
| | | | - Hui Ma
- Tsinghua University, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, China
- Tsinghua University, Department of Physics, Beijing, China
| | - Razvigor Ossikovski
- Institut Polytechnique de Paris, École Polytechnique, CNRS, LPICM, Palaiseau, France
| | - Tatiana Novikova
- Institut Polytechnique de Paris, École Polytechnique, CNRS, LPICM, Palaiseau, France
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| |
Collapse
|
5
|
Felger L, Rodríguez-Núñez O, Gros R, Maragkou T, McKinley R, Moriconi S, Murek M, Zubak I, Novikova T, Pierangelo A, Schucht P. Robustness of the wide-field imaging Mueller polarimetry for brain tissue differentiation and white matter fiber tract identification in a surgery-like environment: an ex vivo study. BIOMEDICAL OPTICS EXPRESS 2023; 14:2400-2415. [PMID: 37206128 PMCID: PMC10191649 DOI: 10.1364/boe.486438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/30/2023] [Accepted: 04/01/2023] [Indexed: 05/21/2023]
Abstract
During neurooncological surgery, the visual differentiation of healthy and diseased tissue is often challenging. Wide-field imaging Muller polarimetry (IMP) is a promising technique for tissue discrimination and in-plane brain fiber tracking in an interventional setup. However, the intraoperative implementation of IMP requires realizing imaging in the presence of remanent blood, and complex surface topography resulting from the use of an ultrasonic cavitation device. We report on the impact of both factors on the quality of polarimetric images of the surgical resection cavities reproduced in fresh animal cadaveric brains. The robustness of IMP is observed under adverse experimental conditions, suggesting a feasible translation of IMP for in vivo neurosurgical applications.
Collapse
Affiliation(s)
- Leonard Felger
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Omar Rodríguez-Núñez
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Romain Gros
- Institute of Tissue Medicine and Pathology, University of Bern, 3010 Bern, Switzerland
| | - Theoni Maragkou
- Institute of Tissue Medicine and Pathology, University of Bern, 3010 Bern, Switzerland
| | - Richard McKinley
- SCAN, University Institute of Diagnostic and Interventional Radiology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Stefano Moriconi
- SCAN, University Institute of Diagnostic and Interventional Radiology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Michael Murek
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Irena Zubak
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Tatiana Novikova
- LPICM, CNRS, Ecole polytechnique, IP Paris, 91128 Palaiseau, France
| | | | - Philippe Schucht
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| |
Collapse
|
6
|
Chue-Sang J, Litorja M, Goldfain AM, Germer TA. Spatial frequency domain Mueller matrix imaging. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:126003. [PMID: 36530345 PMCID: PMC9748470 DOI: 10.1117/1.jbo.27.12.126003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Significance Mueller matrix polarimetry (MMP) and spatial frequency domain imaging (SFDI) are wide-field optical imaging modalities that differentiate tissue primarily by structure alignment and photon transport coefficient, respectively. Because these effects can be related, combining MMP and SFDI may enhance tissue differentiation beyond the capability of each modality alone. Aim An instrument was developed to combine MMP and SFDI with the goal of testing whether it enhances contrast of features in reflection mode. Approach The instrument was constructed using liquid crystal elements for polarization control, a digital light processing projector for generating sinusoidal illumination patterns, and a digital camera for imaging. A theoretical analysis shows that the SFD Mueller matrix is complex-valued and does not follow the same behavior as a regular Mueller matrix. Images were acquired from an anisotropic tissue phantom, an optical fiber bundle, and cerebellum, thalamus, and cerebrum tissues. Results The measurement results suggest that singly scattered, few scattered, and diffusely scattered photon paths can be distinguished in some of the samples investigated. The combined imaging modality yields additional spatial frequency phase information, which highlights paths having only a few scattering events. Conclusions The combination of MMP and SFDI offers contrast mechanisms inaccessible by each modality used alone.
Collapse
Affiliation(s)
- Joseph Chue-Sang
- University of Maryland, Department of Chemistry and Biochemistry, College Park, Maryland, United States
- National Institute of Standards of Technology, Sensor Science Division, Gaithersburg, Maryland, United States
| | - Maritoni Litorja
- National Institute of Standards of Technology, Sensor Science Division, Gaithersburg, Maryland, United States
| | - Aaron M. Goldfain
- National Institute of Standards of Technology, Sensor Science Division, Gaithersburg, Maryland, United States
| | - Thomas A. Germer
- National Institute of Standards of Technology, Sensor Science Division, Gaithersburg, Maryland, United States
| |
Collapse
|
7
|
Lee HR, Lotz C, Kai Groeber Becker F, Dembski S, Novikova T. Digital histology of tissue with Mueller microscopy and FastDBSCAN. APPLIED OPTICS 2022; 61:9616-9624. [PMID: 36606902 DOI: 10.1364/ao.473095] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 10/08/2022] [Indexed: 06/17/2023]
Abstract
We present the results of the automated post-processing of Mueller microscopy images of skin tissue models with a new fast version of the algorithm of density-based spatial clustering of applications with noise (FastDBSCAN) and discuss the advantages of its implementation for digital histology of tissue. We demonstrate that using the FastDBSCAN algorithm, one can produce the diagnostic segmentation of high resolution images of tissue by several orders of magnitude faster and with high accuracy (>97%) compared to the original version of the algorithm.
Collapse
|
8
|
Novikova T, Ramella-Roman JC. Is a complete Mueller matrix necessary in biomedical imaging? OPTICS LETTERS 2022; 47:5549-5552. [PMID: 37219266 DOI: 10.1364/ol.471239] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 10/06/2022] [Indexed: 05/24/2023]
Abstract
The advent of imagers with integrated linear polarization selectivity opens new opportunities for researchers interested in the polarization properties of biological tissues. In this Letter, we explore the mathematical framework necessary to obtain common parameters of interest: azimuth; retardance; and depolarization with reduced Mueller matrices that can be measured with the new instrumentation. We show that in the case of acquisition close to the tissue normal, simple algebraic analysis of the reduced form of the Mueller matrix yields results very close to those obtained with more complex decomposition algorithms applied to a complete Mueller matrix.
Collapse
|
9
|
Lien CH, Chen ZH, Phan QH. Birefringence effect studies of collagen formed by nonenzymatic glycation using dual-retarder Mueller polarimetry. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:087001. [PMID: 36452033 PMCID: PMC9349470 DOI: 10.1117/1.jbo.27.8.087001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 07/18/2022] [Indexed: 06/17/2023]
Abstract
SIGNIFICANCE Nonenzymatic glycation of collagen covalently attaches an addition of sugar molecules that initially were involved in a reversibly reaction with amino groups on the protein. Due to the ultimate formation of stable irreversible advanced glycation end products, the process of glycation leads to abnormal irreversible cross-linking, which ultimately accumulates with age and/or diabetes in the extracellular matrix, altering its organization. AIM We report the use of dual-retarder Mueller polarimetry in conjunction with phase retardance to differentiate collagen cross-linking in a normal collagen gel matrix from that in tissues with nonenzymatic cross-linking. APPROACH A dual-liquid crystal-based Mueller polarimetry system that involves electronic modulation of polarization state generators (PSGs) was employed to produce all types of polarization states without moving any part and enable detection of the signal directly using a Stokes polarimeter. The linear phase retardance response was obtained for the characterization of the solution and gel forms of collagen using differential Mueller matrix analysis. RESULTS We found that linear phase retardance measurements via differential Mueller matrix polarimetry successfully differentiated collagen gel matrices with different degrees of cross-linking formed by a nonenzymatic glycation process and demonstrated that this technology constitutes a quick and simple modality. CONCLUSIONS This approach has high sensitivity for studying differences in fibrillar cross-linking in glycated collagen. Further, our work suggests that this method of structural analysis has potential clinical diagnostic value owing to its noninvasive and cost-efficient nature.
Collapse
Affiliation(s)
- Chi-Hsiang Lien
- National United University, Department of Mechanical Engineering, Miaoli, Taiwan
| | - Zong-Hong Chen
- National United University, Department of Mechanical Engineering, Miaoli, Taiwan
| | - Quoc-Hung Phan
- National United University, Department of Mechanical Engineering, Miaoli, Taiwan
| |
Collapse
|
10
|
Pham TTH, Nguyen HP, Luu TN, Le NB, Vo VT, Huynh NT, Phan QH, Le TH. Combined Mueller matrix imaging and artificial intelligence classification framework for Hepatitis B detection. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:075002. [PMID: 36451700 PMCID: PMC9321198 DOI: 10.1117/1.jbo.27.7.075002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 07/15/2022] [Indexed: 06/02/2023]
Abstract
SIGNIFICANCE The combination of polarized imaging with artificial intelligence (AI) technology has provided a powerful tool for performing an objective and precise diagnosis in medicine. AIM An approach is proposed for the detection of hepatitis B (HB) virus using a combined Mueller matrix imaging technique and deep learning method. APPROACH In the proposed approach, Mueller matrix imaging polarimetry is applied to obtain 4 × 4 Mueller matrix images of 138 HBsAg-containing (positive) serum samples and 136 HBsAg-free (negative) serum samples. The kernel estimation density results show that, of the 16 Mueller matrix elements, elements M 22 and M 33 provide the best discriminatory power between the positive and negative samples. RESULTS As a result, M 22 and M 33 are taken as the inputs to five different deep learning models: Xception, VGG16, VGG19, ResNet 50, and ResNet150. It is shown that the optimal classification accuracy (94.5%) is obtained using the VGG19 model with element M 22 as the input. CONCLUSIONS Overall, the results confirm that the proposed hybrid Mueller matrix imaging and AI framework provides a simple and effective approach for HB virus detection.
Collapse
Affiliation(s)
- Thi-Thu-Hien Pham
- International University, School of Biomedical Engineering, HCMC, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hoang-Phuoc Nguyen
- International University, School of Biomedical Engineering, HCMC, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thanh-Ngan Luu
- International University, School of Biomedical Engineering, HCMC, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Ngoc-Bich Le
- International University, School of Biomedical Engineering, HCMC, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Van-Toi Vo
- International University, School of Biomedical Engineering, HCMC, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Ngoc-Trinh Huynh
- University of Medicine and Pharmacy, Department of Pharmacognosy, HCMC, Ho Chi Minh City, Vietnam
| | - Quoc-Hung Phan
- National United University, Department of Mechanical Engineering, Miaoli, Taiwan
| | - Thanh-Hai Le
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
- Ho Chi Minh City University of Technology (HCMUT), Department of Mechatronics, Ho Chi Minh City, Vietnam
| |
Collapse
|
11
|
Bagha T, Kamal AM, Pal UM, Mohan Rao PS, Pandya HJ. Toward the development of a polarimetric tool to diagnose the fibrotic human ventricular myocardium. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:055001. [PMID: 35562842 PMCID: PMC9106211 DOI: 10.1117/1.jbo.27.5.055001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 04/12/2022] [Indexed: 06/15/2023]
Abstract
SIGNIFICANCE Optical polarimetry is an emerging modality that effectively quantifies the bulk optical properties that correlate with the anisotropic structural properties of cardiac tissues. We demonstrate the application of a polarimetric tool for characterizing healthy and fibrotic human myocardial tissues efficiently with a high degree of accuracy. AIM The study was aimed to characterize the myocardial tissues from the left ventricle and right ventricle of N = 7 control and N = 10 diseased subjects. The diseased subjects were composed of two groups: N = 7 with rheumatic heart disease (RHD) and N = 3 with myxomatous valve (MV) disease. APPROACH A portable, affordable, and accurate linear polarization-based diagnostic tool is developed to measure the degree of linear polarization (DOLP) of the myocardial tissues while working at a wavelength of 850 nm. RESULTS The sensitivity, specificity, and accuracy of the polarimetric tool in distinguishing the control group from the RHD group were found to be 73.33%, 76.92%, and 75%, respectively, and from the MV group were 91.6%, 62.5%, and 80%, respectively, which demonstrates the efficacy of the polarimetric tool to distinguish the healthy myocardial tissues from diseased tissues. CONCLUSIONS We have successfully developed a polarimetric tool that can aid cardiologists in characterizing the myocardial tissues in conjunction with endomyocardial biopsy. This work should be followed up with experiments on a large cohort of control and diseased subjects. We intend to create and develop a probe to quantify the DOLP of in vivo heart tissue during surgery.
Collapse
Affiliation(s)
- Twinkle Bagha
- Indian Institute of Science, Department of Electronic Systems Engineering, Bangalore, Karnataka, India
| | - Arif Mohd. Kamal
- Indian Institute of Science, Department of Electronic Systems Engineering, Bangalore, Karnataka, India
| | - Uttam M. Pal
- Indian Institute of Science, Department of Electronic Systems Engineering, Bangalore, Karnataka, India
- Indian Institute of Information Technology Design and Manufacturing, Kancheepuram, Tamil Nadu, India
| | | | - Hardik J. Pandya
- Indian Institute of Science, Department of Electronic Systems Engineering, Bangalore, Karnataka, India
| |
Collapse
|
12
|
Ashraf MW, Le Gratiet A, Diaspro A. Computational Modeling of Chromatin Fiber to Characterize Its Organization Using Angle-Resolved Scattering of Circularly Polarized Light. Polymers (Basel) 2021; 13:polym13193422. [PMID: 34641237 PMCID: PMC8512730 DOI: 10.3390/polym13193422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/01/2021] [Accepted: 10/03/2021] [Indexed: 12/19/2022] Open
Abstract
Understanding the structural organization of chromatin is essential to comprehend the gene functions. The chromatin organization changes in the cell cycle, and it conforms to various compaction levels. We investigated a chromatin solenoid model with nucleosomes shaped as cylindrical units arranged in a helical array. The solenoid with spherical-shaped nucleosomes was also modeled. The changes in chiral structural parameters of solenoid induced different compaction levels of chromatin fiber. We calculated the angle-resolved scattering of circularly polarized light to probe the changes in the organization of chromatin fiber in response to the changes in its chiral parameters. The electromagnetic scattering calculations were performed using discrete dipole approximation (DDA). In the chromatin structure, nucleosomes have internal interactions that affect chromatin compaction. The merit of performing computations with DDA is that it takes into account the internal interactions. We demonstrated sensitivity of the scattering signal’s angular behavior to the changes in these chiral parameters: pitch, radius, the handedness of solenoid, number of solenoid turns, the orientation of solenoid, the orientation of nucleosomes, number of nucleosomes, and shape of nucleosomes. These scattering calculations can potentially benefit applying a label-free polarized-light-based approach to characterize chromatin DNA and chiral polymers at the nanoscale level.
Collapse
Affiliation(s)
- Muhammad Waseem Ashraf
- Nanoscopy and NIC@IIT, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, 16152 Genoa, Italy;
- DIFILAB, Department of Physics, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy
- Correspondence: (M.W.A.); (A.D.)
| | - Aymeric Le Gratiet
- Nanoscopy and NIC@IIT, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, 16152 Genoa, Italy;
- Institut FOTON-UMR 6082, Université de Rennes, CNRS, F-22305 Rennes, France
| | - Alberto Diaspro
- Nanoscopy and NIC@IIT, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, 16152 Genoa, Italy;
- DIFILAB, Department of Physics, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy
- Correspondence: (M.W.A.); (A.D.)
| |
Collapse
|
13
|
Rodríguez-Núñez O, Schucht P, Hewer E, Novikova T, Pierangelo A. Polarimetric visualization of healthy brain fiber tracts under adverse conditions: ex vivo studies. BIOMEDICAL OPTICS EXPRESS 2021; 12:6674-6685. [PMID: 34745764 PMCID: PMC8548022 DOI: 10.1364/boe.439754] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/22/2021] [Accepted: 09/22/2021] [Indexed: 05/09/2023]
Abstract
We suggest using the wide-field imaging Mueller polarimetry to contrast optically anisotropic fiber tracts of healthy brain white matter for the detection of brain tumor borders during neurosurgery. Our prior studies demonstrate that this polarimetric imaging modality detects correctly the in-plane orientation of brain white matter fiber tracts of a flat formalin-fixed thick brain specimen in reflection geometry [IEEE Trans. Med. Imaging39, 4376 (2020)10.1109/TMI.2020.3018439]. Here we present the results of ex vivo polarimetric studies of large cross-sections of fresh calf brain in reflection geometry with a special focus on the impact of the adverse measurement conditions (e.g. complex surface topography, presence of blood, etc.) on the quality of polarimetric images and the detection performance of white matter fiber tracts and their in-plane orientation.
Collapse
Affiliation(s)
| | - Philippe Schucht
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, 3010, Bern, Switzerland
| | - Ekkehard Hewer
- Lausanne University Hospital and University of Lausanne, 1011 Lausanne, Switzerland
| | - Tatiana Novikova
- LPICM, CNRS, Ecole polytechnique, IP Paris, Palaiseau, 91128, France
| | - Angelo Pierangelo
- LPICM, CNRS, Ecole polytechnique, IP Paris, Palaiseau, 91128, France
| |
Collapse
|