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Moiseev A, Sherstnev E, Kiseleva E, Achkasova K, Potapov A, Yashin K, Sirotkina M, Gelikonov G, Matkivsky V, Shilyagin P, Ksenofontov S, Bederina E, Medyanik I, Zagaynova E, Gladkova N. Depth-resolved method for attenuation coefficient calculation from optical coherence tomography data for improved biological structure visualization. JOURNAL OF BIOPHOTONICS 2023; 16:e202100392. [PMID: 37551154 DOI: 10.1002/jbio.202100392] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 08/09/2023]
Abstract
Optical coherence tomography (OCT) is a promising tool for intraoperative tissue morphology determination. Several studies suggest that attenuation coefficient derived from the OCT images, can differentiate between tissues of different morphology, such as normal and pathological structures of the brain, skin, and other tissues. In the present study, the depth-resolved method for attenuation coefficient calculation was adopted for the real-world situation of the depth-dependent OCT sensitivity and additive imaging noise with nonzero mean. It was shown that in the case of sharp focusing (~10 μm spot full width at half maximum [FWHM] or smaller at 1.3 μm central wavelength) only the proposed method for depth-dependent sensitivity compensation does not introduce misleading artifacts into the calculated attenuation coefficient distribution. At the same time, the scanning beam focus spot with FWHM greater than 10 μm at 1.3 μm central wavelength allows one to use multiple approaches to the attenuation coefficient calculation without introducing noticeable bias. This feature may hinder the need for robust corrections for the depth-resolved attenuation coefficient estimations from the community.
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Affiliation(s)
- Alexander Moiseev
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Evgeny Sherstnev
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Elena Kiseleva
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Ksenia Achkasova
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Arseniy Potapov
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | | | - Marina Sirotkina
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Grigory Gelikonov
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Vasily Matkivsky
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Pavel Shilyagin
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Sergey Ksenofontov
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Evgenia Bederina
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Igor Medyanik
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Elena Zagaynova
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
- Nizhny Novgorod State University, Nizhny Novgorod, Russia
| | - Natalia Gladkova
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
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Potapov A, Matveev L, Moiseev A, Sedova E, Loginova M, Karabut M, Kuznetsova I, Levchenko V, Grebenkina E, Gamayunov S, Radenska-Lopovok S, Sirotkina M, Gladkova N. Multimodal OCT Control for Early Histological Signs of Vulvar Lichen Sclerosus Recurrence after Systemic PDT: Pilot Study. Int J Mol Sci 2023; 24:13967. [PMID: 37762270 PMCID: PMC10531024 DOI: 10.3390/ijms241813967] [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: 08/22/2023] [Revised: 09/03/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023] Open
Abstract
Photodynamic therapy (PDT) is a modern treatment for severe or treatment-resistant vulvar lichen sclerosus (VLS). The chronic and recurrent nature of VLS requires control of recurrences at an early stage. In this paper, a non-invasive multimodal optical coherence tomography (OCT) method was used to control for early histological signs of VLS recurrence after systemic PDT using Photodithazine®. To interpret the OCT data, a histological examination was performed before PDT and 3 months after PDT. Two groups of patients were identified: with early histological signs of VLS recurrence (Group I, n = 5) and without histological signs of VLS recurrence (Group II, n = 6). We use structural OCT, OCT angiography, and OCT lymphangiography throughout 6 months after PDT to visually assess the skin components and to quantitatively assess the dermis by calculating the depth-resolved attenuation coefficient and the density of blood and lymphatic vessels. The OCT data assessment showed a statistically significant difference between the patient groups 3 months after PDT. In Group II, all the studied OCT parameters reached maximum values by the 3rd month after PDT, which indicated recovery of the skin structure. At the same time, in Group I, the values of OCT parameters did not approach the values those in Group II even after 6 months. The obtained results of multimodal OCT can be used for non-invasive control of early histological recurrence of VLS after systemic PDT and for adjusting treatment tactics in advance, without waiting for new clinical manifestations of the disease.
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Affiliation(s)
- Arseniy Potapov
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia; (A.P.); (N.G.)
| | - Lev Matveev
- Institute of Applied Physics Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia; (L.M.); (A.M.)
| | - Alexander Moiseev
- Institute of Applied Physics Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia; (L.M.); (A.M.)
| | - Elena Sedova
- Nizhny Novgorod Regional Oncologic Hospital, 603126 Nizhny Novgorod, Russia
| | - Maria Loginova
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia; (A.P.); (N.G.)
- Center of Photonics, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
| | - Maria Karabut
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia; (A.P.); (N.G.)
| | - Irina Kuznetsova
- Department of Obstetrics and Gynecology, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
- N.A. Semashko Nizhny Novgorod Regional Clinical Hospital, 603126 Nizhny Novgorod, Russia
| | | | - Elena Grebenkina
- Nizhny Novgorod Regional Oncologic Hospital, 603126 Nizhny Novgorod, Russia
- Kstovo Central District Hospital, 607650 Kstovo, Russia
| | - Sergey Gamayunov
- Nizhny Novgorod Regional Oncologic Hospital, 603126 Nizhny Novgorod, Russia
| | - Stefka Radenska-Lopovok
- Institute of Clinical Morphology and Digital Pathology, I.M. Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
| | - Marina Sirotkina
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia; (A.P.); (N.G.)
| | - Natalia Gladkova
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia; (A.P.); (N.G.)
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Miao Y, Sudol NT, Li Y, Chen JJ, Arthur RA, Qiu S, Jiang Y, Tadir Y, Lane F, Chen Z. Optical coherence tomography evaluation of vaginal epithelial thickness during CO 2 laser treatment: A pilot study. JOURNAL OF BIOPHOTONICS 2022; 15:e202200052. [PMID: 35860856 PMCID: PMC9633389 DOI: 10.1002/jbio.202200052] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 06/18/2022] [Accepted: 07/19/2022] [Indexed: 05/20/2023]
Abstract
Genitourinary syndrome of menopause (GSM) negatively affects more than half of postmenopausal women. Energy-based therapy has been explored as a minimally invasive treatment for GSM; however, its mechanism of action and efficacy is controversial. Here, we report on a pilot imaging study conducted on a small group of menopause patients undergoing laser treatment. Intravaginal optical coherence tomography (OCT) endoscope was used to quantitatively monitor the changes in the vaginal epithelial thickness (VET) during fractional-pixel CO2 laser treatment. Eleven patients with natural menopause and one surgically induced menopause patient were recruited in this clinical study. Following the laser treatment, 6 out of 11 natural menopause patient showed increase in both proximal and distal VET, while two natural menopause patient showed increase in VET in only one side of vaginal tract. Furthermore, the patient group that showed increased VET had thinner baseline VET compared to the patients that showed decrease in VET after laser treatment. These results demonstrate the potential utility of intravaginal OCT endoscope in evaluating the vaginal tissue integrity and tailoring vaginal laser treatment on a per-person basis, with the potential to monitor other treatment procedures.
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Affiliation(s)
- Yusi Miao
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Neha T Sudol
- Department of Obstetrics & Gynecology, University of California, Irvine, Medical Center, Irvine, CA, USA
| | - Yan Li
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Jason J Chen
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Rebecca A. Arthur
- Department of Obstetrics & Gynecology, University of California, Irvine, Medical Center, Irvine, CA, USA
| | - Saijun Qiu
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Yuchen Jiang
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Yona Tadir
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
| | - Felicia Lane
- Department of Obstetrics & Gynecology, University of California, Irvine, Medical Center, Irvine, CA, USA
| | - Zhongping Chen
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
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Qureshi MM, Allam N, Peters T, Demidov V, Vitkin A. Detection and differentiation of semi-transparent materials simulating biological structures using optical coherence tomography: a phantom study. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:100501. [PMID: 36221173 PMCID: PMC9553520 DOI: 10.1117/1.jbo.27.10.100501] [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: 05/06/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
SIGNIFICANCE Lymphatic and peripheral nervous system imaging is of prime importance for monitoring various important pathologic processes including cancer development and metastasis, and response to therapy. AIM Optical coherence tomography (OCT) is a promising approach for this imaging task but is challenged by the near-transparent nature of these structures. Our aim is to detect and differentiate semi-transparent materials using OCT texture analysis, toward label-free neurography and lymphography. APPROACH We have recently demonstrated an innovative OCT texture analysis-based approach that used speckle statistics to image lymphatics and nerves in-vivo that does not rely on negative contrast. However, these two near-transparent structures could not be easily differentiated from each other in the texture analysis parameter space. Here, we perform a rigorous follow-up study to improve upon this differentiation in controlled phantoms mimicking the optical properties of these tissues. RESULTS The results of the three-parameter Rayleigh distribution fit to the OCT images of six types of tissue-mimicking materials varying in transparency and biophysical properties demonstrate clear differences between them, suggesting routes for improved lymphatics-nerves differentiation. CONCLUSIONS We demonstrate a novel OCT texture analysis-based lymphatics-nerves differentiation methodology in tissue-simulating phantoms. Future work will focus on longitudinal in-vivo lymphangiography and neurography in response to cancer therapeutics toward adaptive personalized medicine.
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Affiliation(s)
- Muhammad Mohsin Qureshi
- Princess Margaret Cancer Centre, Division of Biophysics and Bioimaging, Toronto, Ontario, Canada
| | - Nader Allam
- University of Toronto, Department of Medical Biophysics, Toronto, Ontario, Canada
| | - Taylor Peters
- University of Toronto, Division of Engineering Science, Ontario, Canada
| | - Valentin Demidov
- Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Alex Vitkin
- Princess Margaret Cancer Centre, Division of Biophysics and Bioimaging, Toronto, Ontario, Canada
- University of Toronto, Department of Medical Biophysics, Toronto, Ontario, Canada
- University of Toronto, Department of Radiation Oncology, Toronto, Ontario, Canada
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Potapov AL, Sirotkina MA, Matveev LA, Dudenkova VV, Elagin VV, Kuznetsov SS, Karabut MM, Komarova AD, Vagapova NN, Safonov IK, Kuznetsova IA, Radenska-Lopovok SG, Zagaynova EV, Gladkova ND. Multiphoton microscopy assessment of the structure and variability changes of dermal connective tissue in vulvar lichen sclerosus: A pilot study. JOURNAL OF BIOPHOTONICS 2022; 15:e202200036. [PMID: 35652856 DOI: 10.1002/jbio.202200036] [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: 02/10/2022] [Revised: 04/17/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
In this article, we offer a novel classification of progressive changes in the connective tissue of dermis in vulvar lichen sclerosus (VLS) relying on quantitative assessment of the second harmonic generation (SHG) signal received from formalin fixed and deparaffinized tissue sections. We formulate criteria for distinguishing four degrees of VLS development: Initial-Mild-Moderate-Severe. Five quantitative characteristics (length and thickness type I Collagen fibers, Mean SHG signal intensity, Skewness and Coherence SHG signal) are used to describe the sequential degradation of connective tissue (changes in the structure, orientation, shape and density of collagen fibers) up to the formation of specific homogeneous masses. Each of the degrees has a characteristic set of quantitatively expressed features. We focus on the identification and description of early, initial changes of the dermis as the least specific. The results obtained by us and the proposed classification of the degrees of the disease can be used to objectify the dynamics of tissue changes during treatment.
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Affiliation(s)
| | | | - Lev A Matveev
- Institute of Applied Physics Russian Academy of Sciences, Nizhny Novgorod, Russia
| | | | - Vadim V Elagin
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Sergey S Kuznetsov
- N.A. Semashko Nizhny Novgorod Regional Clinical Hospital, Nizhny Novgorod, Russia
| | - Maria M Karabut
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Anastasia D Komarova
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
- Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia
| | - Nailya N Vagapova
- N.A. Semashko Nizhny Novgorod Regional Clinical Hospital, Nizhny Novgorod, Russia
| | - Ivan K Safonov
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Irina A Kuznetsova
- N.A. Semashko Nizhny Novgorod Regional Clinical Hospital, Nizhny Novgorod, Russia
| | | | - Elena V Zagaynova
- Privolzhsky Research Medical University, Nizhny Novgorod, Russia
- Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia
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Optical Coherence Tomography Angiography and Attenuation Imaging for Label-Free Observation of Functional Changes in the Intestine after Sympathectomy: A Pilot Study. PHOTONICS 2022. [DOI: 10.3390/photonics9050304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We present in this study optical coherence tomography angiography (OCTA) and OCT attenuation imaging (OCTAI) for in vivo non-destructive visualization of intramural blood and lymphatic vessels of the intestine wall. Rabbit small intestine in the norm and after thoracolumbar sympathectomy served as the object of the intraoperative study. Compared to OCTA real-time imaging, OCTAI takes several minutes and can be termed as “nearly real time”. OCTAI signal processing was modified to take into account the signal-to-noise ratio and the final thickness of the intestine wall. The results showed that, after sympathectomy, changes in functioning of intramural blood and lymphatic vessels were observed with a high statistical significance. The occurrence of trauma-induced constriction of the blood and lymphatic vessels led to an especially pronounced decrease in the length of small-caliber (<30 µm) blood vessels (p < 10−5), as well as in the volumetric density of lymphatic vessels (on average by ~50%) compared to their initial state. Remarkably, OCTA/OCTAI modalities provide the unique ability for “nearly-instant detection” of changes in functional status of the tissues, long before they become visible on histology. The proposed approach can be used in further experiments to clarify the mechanisms of changes in intestinal blood and lymph flows in response to trauma of the nervous system. Furthermore, potentially it can be used intraoperatively in patients requiring express diagnosis of the state of intramural blood and lymph circulation.
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