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Malone J, Hill C, Tanskanen A, Liu K, Ng S, MacAulay C, Poh CF, Lane PM. Imaging Biomarkers of Oral Dysplasia and Carcinoma Measured with In Vivo Endoscopic Optical Coherence Tomography. Cancers (Basel) 2024; 16:2751. [PMID: 39123478 PMCID: PMC11311571 DOI: 10.3390/cancers16152751] [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: 07/06/2024] [Revised: 07/27/2024] [Accepted: 07/30/2024] [Indexed: 08/12/2024] Open
Abstract
Optical coherence tomography is a noninvasive imaging technique that provides three-dimensional visualization of subsurface tissue structures. OCT has been proposed and explored in the literature as a tool to assess oral cancer status, select biopsy sites, or identify surgical margins. Our endoscopic OCT device can generate widefield (centimeters long) imaging of lesions at any location in the oral cavity-but it is challenging for raters to quantitatively assess and score large volumes of data. Leveraging a previously developed epithelial segmentation network, this work develops quantifiable biomarkers that provide direct measurements of tissue properties in three dimensions. We hypothesize that features related to morphology, tissue attenuation, and contrast between tissue layers will be able to provide a quantitative assessment of disease status (dysplasia through carcinoma). This work retrospectively assesses seven biomarkers on a lesion-contralateral matched OCT dataset of the lateral and ventral tongue (40 patients, 70 sites). Epithelial depth and loss of epithelial-stromal boundary visualization provide the strongest discrimination between disease states. The stroma optical attenuation coefficient provides a distinction between benign lesions from dysplasia and carcinoma. The stratification biomarkers visualize subsurface changes, which provides potential for future utility in biopsy site selection or treatment margin delineation.
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Affiliation(s)
- Jeanie Malone
- Department of Integrative Oncology, British Columbia Cancer Research Institute, 675 W 10th Ave., Vancouver, BC V5Z 1L3, Canada (P.M.L.)
- School of Biomedical Engineering, University of British Columbia, 251-2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Chloe Hill
- Department of Integrative Oncology, British Columbia Cancer Research Institute, 675 W 10th Ave., Vancouver, BC V5Z 1L3, Canada (P.M.L.)
- School of Engineering Science, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Adrian Tanskanen
- Department of Integrative Oncology, British Columbia Cancer Research Institute, 675 W 10th Ave., Vancouver, BC V5Z 1L3, Canada (P.M.L.)
- School of Biomedical Engineering, University of British Columbia, 251-2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Kelly Liu
- Department of Integrative Oncology, British Columbia Cancer Research Institute, 675 W 10th Ave., Vancouver, BC V5Z 1L3, Canada (P.M.L.)
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, 350-2194 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Samson Ng
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, 350-2194 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Calum MacAulay
- Department of Integrative Oncology, British Columbia Cancer Research Institute, 675 W 10th Ave., Vancouver, BC V5Z 1L3, Canada (P.M.L.)
- Department of Pathology and Laboratory Medicine, University of British Columbia and Vancouver General Hospital, G227-2211 Wesbrook Mall, Vancouver, BC V6 T 1Z7, Canada
| | - Catherine F. Poh
- Department of Integrative Oncology, British Columbia Cancer Research Institute, 675 W 10th Ave., Vancouver, BC V5Z 1L3, Canada (P.M.L.)
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, 350-2194 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Pierre M. Lane
- Department of Integrative Oncology, British Columbia Cancer Research Institute, 675 W 10th Ave., Vancouver, BC V5Z 1L3, Canada (P.M.L.)
- School of Biomedical Engineering, University of British Columbia, 251-2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- School of Engineering Science, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
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Schraven S, Brück R, Rosenhain S, Lemainque T, Heines D, Noormohammadian H, Pabst O, Lederle W, Gremse F, Kiessling F. CT- and MRI-Aided Fluorescence Tomography Reconstructions for Biodistribution Analysis. Invest Radiol 2024; 59:504-512. [PMID: 38038691 DOI: 10.1097/rli.0000000000001052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
OBJECTIVES Optical fluorescence imaging can track the biodistribution of fluorophore-labeled drugs, nanoparticles, and antibodies longitudinally. In hybrid computed tomography-fluorescence tomography (CT-FLT), CT provides the anatomical information to generate scattering and absorption maps supporting a 3-dimensional reconstruction from the raw optical data. However, given the CT's limited soft tissue contrast, fluorescence reconstruction and quantification can be inaccurate and not sufficiently detailed. Magnetic resonance imaging (MRI) can overcome these limitations and extend the options for tissue characterization. Thus, we aimed to establish a hybrid CT-MRI-FLT approach for whole-body imaging and compared it with CT-FLT. MATERIALS AND METHODS The MRI-based hybrid imaging approaches were established first by scanning a water and coconut oil-filled phantom, second by quantifying Cy7 concentrations of inserts in dead mice, and finally by analyzing the biodistribution of AF750-labeled immunoglobulins (IgG, IgA) in living SKH1 mice. Magnetic resonance imaging, acquired with a fat-water-separated mDixon sequence, CT, and FLT were co-registered using markers in the mouse holder frame filled with white petrolatum, which was solid, stable, and visible in both modalities. RESULTS Computed tomography-MRI fusion was confirmed by comparing the segmentation agreement using Dice scores. Phantom segmentations showed good agreement, after correction for gradient linearity distortion and chemical shift. Organ segmentations in dead and living mice revealed adequate agreement for fusion. Marking the mouse holder frame and the successful CT-MRI fusion enabled MRI-FLT as well as CT-MRI-FLT reconstructions. Fluorescence tomography reconstructions supported by CT, MRI, or CT-MRI were comparable in dead mice with 60 pmol fluorescence inserts at different locations. Although standard CT-FLT reconstruction only considered general values for soft tissue, skin, lung, fat, and bone scattering, MRI's more versatile soft tissue contrast enabled the additional consideration of liver, kidneys, and brain. However, this did not change FLT reconstructions and quantifications significantly, whereas for extending scattering maps, it was important to accurately segment the organs and the entire mouse body. The various FLT reconstructions also provided comparable results for the in vivo biodistribution analyses with fluorescent immunoglobulins. However, MRI additionally enabled the visualization of gallbladder, thyroid, and brain. Furthermore, segmentations of liver, spleen, and kidney were more reliable due to better-defined contours than in CT. Therefore, the improved segmentations enabled better assignment of fluorescence signals and more differentiated conclusions with MRI-FLT. CONCLUSIONS Whole-body CT-MRI-FLT was implemented as a novel trimodal imaging approach, which allowed to more accurately assign fluorescence signals, thereby significantly improving pharmacokinetic analyses.
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Affiliation(s)
- Sarah Schraven
- From the Institute for Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany (S.S., R.B., S.R., T.L., D.H., W.L., F.G., F.K.); Institute of Molecular Medicine, RWTH Aachen University, Aachen, Germany (H.N., O.P.); Gremse-IT GmbH, Aachen, Germany (S.R., F.G.); Department for Diagnostic and Interventional Radiology, RWTH Aachen University, Aachen, Germany (T.L.); Helmholtz Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany (F.K.); and Fraunhofer MEVIS, Institute for Medical Image Computing, Aachen, Germany (F.K.)
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Neubrand LB, van Leeuwen TG, Faber DJ. Towards non-invasive tissue hydration measurements with optical coherence tomography. JOURNAL OF BIOPHOTONICS 2024; 17:e202300532. [PMID: 38735734 DOI: 10.1002/jbio.202300532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 04/11/2024] [Accepted: 04/16/2024] [Indexed: 05/14/2024]
Abstract
The attenuation coefficient ( μ OCT ) measured by optical coherence tomography (OCT) has been used to determine tissue hydration. Previous dual-wavelength OCT systems could not attain the needed precision, which we attribute to the absence of wavelength-dependent scattering of tissue in the underlying model. Assuming that scattering can be described using two parameters, we propose a triple/quadrupole-OCT system to achieve clinically relevant precision in water volume fraction. In this study, we conduct a quantitative analysis to determine the necessary precision of μ OCT measurements and compare it with numerical simulation. Our findings emphasize that achieving a clinically relevant assessment of a 2% water fraction requires determining the attenuation coefficient with a remarkable precision of 0.01 m m - 1 . This precision threshold is influenced by the chosen wavelength for attenuation measurement and can be enhanced through the inclusion of a fourth wavelength range.
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Affiliation(s)
- Linda B Neubrand
- Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Atherosclerosis and Ischemic Syndromes, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Imaging and Biomarkers, Amsterdam, The Netherlands
| | - Ton G van Leeuwen
- Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Atherosclerosis and Ischemic Syndromes, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Imaging and Biomarkers, Amsterdam, The Netherlands
| | - Dirk J Faber
- Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Atherosclerosis and Ischemic Syndromes, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Imaging and Biomarkers, Amsterdam, The Netherlands
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4
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Gubarkova E, Potapov A, Moiseev A, Kiseleva E, Krupinova D, Shatilova K, Karabut M, Khlopkov A, Loginova M, Radenska-Lopovok S, Gelikonov G, Grechkanev G, Gladkova N, Sirotkina M. Depth-Resolved Attenuation Mapping of the Vaginal Wall under Prolapse and after Laser Treatment Using Cross-Polarization Optical Coherence Tomography: A Pilot Study. Diagnostics (Basel) 2023; 13:3487. [PMID: 37998623 PMCID: PMC10670580 DOI: 10.3390/diagnostics13223487] [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: 09/25/2023] [Revised: 11/02/2023] [Accepted: 11/16/2023] [Indexed: 11/25/2023] Open
Abstract
Vaginal wall prolapse is the most common type of pelvic organ prolapse and is mainly associated with collagen bundle changes in the lamina propria. Neodymium (Nd:YAG) laser treatment was used as an innovative, minimally invasive and non-ablative procedure for the treatment of early-stage vaginal wall prolapse. The purpose of this pilot study was to assess connective tissue changes in the vaginal wall under prolapse without treatment and after Nd:YAG laser treatment using cross-polarization optical coherence tomography (CP OCT) with depth-resolved attenuation mapping. A total of 26 freshly excised samples of vaginal wall from 26 patients with age norm (n = 8), stage I-II prolapses without treatment (n = 8) and stage I-II prolapse 1-2 months after Nd:YAG laser treatment (n = 10) were assessed. As a result, for the first time, depth-resolved attenuation maps of the vaginal wall in the B-scan projection in the co- and cross-polarization channels were constructed. Two parameters within the lamina propria were target calculated: the median value and the percentages of high (≥4 mm-1) and low (<4 mm-1) attenuation coefficient values. A significant (p < 0.0001) decrease in the parameters in the case of vaginal wall prolapse compared to the age norm was identified. After laser treatment, a significant (p < 0.0001) increase in the parameters compared to the normal level was also observed. Notably, in the cross-channel, both parameters showed a greater difference between the groups than in the co-channel. Therefore, using the cross-channel achieved more reliable differentiation between the groups. To conclude, attenuation coefficient maps allow visualization and quantification of changes in the condition of the connective tissue of the vaginal wall. In the future, CP OCT could be used for in vivo detection of early-stage vaginal wall prolapse and for monitoring the effectiveness of treatment.
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Affiliation(s)
- Ekaterina Gubarkova
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
- Center of Photonics, Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, Russia
| | - Arseniy Potapov
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
| | - Alexander Moiseev
- Institute of Applied Physics of the Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
| | - Elena Kiseleva
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
| | - Darya Krupinova
- Department of Obstetrics and Gynecology, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
- Nizhny Novgorod Regional Oncologic Hospital, 603126 Nizhny Novgorod, Russia
| | | | - Maria Karabut
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
| | | | - Maria Loginova
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
- Center of Photonics, Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, Russia
| | - Stefka Radenska-Lopovok
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
- Institute of Clinical Morphology and Digital Pathology, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
| | - Grigory Gelikonov
- Institute of Applied Physics of the Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
| | - Gennady Grechkanev
- Department of Obstetrics and Gynecology, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
| | - Natalia Gladkova
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
| | - Marina Sirotkina
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, 603950 Nizhny Novgorod, Russia
- Center of Photonics, Lobachevsky State University of Nizhny Novgorod, 603950 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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Tsissios G, Theodoroudis-Rapp G, Chen W, Sallese A, Smucker B, Ernst L, Chen J, Xu Y, Ratvasky S, Wang H, Del Rio-Tsonis K. Characterizing the lens regeneration process in Pleurodeles waltl. Differentiation 2023; 132:15-23. [PMID: 37055300 PMCID: PMC10493237 DOI: 10.1016/j.diff.2023.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 02/06/2023] [Accepted: 02/21/2023] [Indexed: 03/13/2023]
Abstract
BACKGROUND Aging and regeneration are heavily linked processes. While it is generally accepted that regenerative capacity declines with age, some vertebrates, such as newts, can bypass the deleterious effects of aging and successfully regenerate a lens throughout their lifetime. RESULTS Here, we used Spectral-Domain Optical Coherence Tomography (SD-OCT) to monitor the lens regeneration process of larvae, juvenile, and adult newts. While all three life stages were able to regenerate a lens through transdifferentiation of the dorsal iris pigment epithelial cells (iPECs), an age-related change in the kinetics of the regeneration process was observed. Consistent with these findings, iPECs from older animals exhibited a delay in cell cycle re-entry. Furthermore, it was observed that clearance of the extracellular matrix (ECM) was delayed in older organisms. CONCLUSIONS Collectively, our results suggest that although lens regeneration capacity does not decline throughout the lifespan of newts, the intrinsic and extrinsic cellular changes associated with aging alter the kinetics of this process. By understanding how these changes affect lens regeneration in newts, we can gain important insights for restoring the age-related regeneration decline observed in most vertebrates.
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Affiliation(s)
- Georgios Tsissios
- Department of Biology Miami University, Oxford, OH, USA; Center for Visual Sciences at Miami University, Oxford, OH, USA; Cellular Molecular and Structural Biology Program, Miami University, Oxford, OH, USA
| | | | - Weihao Chen
- Center for Visual Sciences at Miami University, Oxford, OH, USA; Cellular Molecular and Structural Biology Program, Miami University, Oxford, OH, USA; Department of Chemical, Paper and Biomedical Engineering, Miami University, Oxford, OH, USA
| | - Anthony Sallese
- Department of Biology Miami University, Oxford, OH, USA; Center for Visual Sciences at Miami University, Oxford, OH, USA
| | - Byran Smucker
- Center for Visual Sciences at Miami University, Oxford, OH, USA; Department of Statistics, Miami University, Oxford, OH, USA
| | - Lake Ernst
- Department of Biology Miami University, Oxford, OH, USA
| | - Junfan Chen
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, USA
| | - Yiqi Xu
- Department of Biology Miami University, Oxford, OH, USA
| | - Sophia Ratvasky
- Department of Biology Miami University, Oxford, OH, USA; Center for Visual Sciences at Miami University, Oxford, OH, USA; Cellular Molecular and Structural Biology Program, Miami University, Oxford, OH, USA
| | - Hui Wang
- Center for Visual Sciences at Miami University, Oxford, OH, USA; Department of Chemical, Paper and Biomedical Engineering, Miami University, Oxford, OH, USA
| | - Katia Del Rio-Tsonis
- Department of Biology Miami University, Oxford, OH, USA; Center for Visual Sciences at Miami University, Oxford, OH, USA; Cellular Molecular and Structural Biology Program, Miami University, Oxford, OH, USA.
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Liu HC, Lin MH, Ting CH, Wang YM, Sun CW. Intraoperative application of optical coherence tomography for lung tumor. JOURNAL OF BIOPHOTONICS 2023; 16:e202200344. [PMID: 36755475 DOI: 10.1002/jbio.202200344] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/06/2023] [Accepted: 01/18/2023] [Indexed: 06/07/2023]
Abstract
On-site instant determination of benign or malignant tumors for deciding the types of resection is crucial during pulmonary surgery. We designed a portable spectral-domain optical coherence tomography (SD-OCT) system to do real-time scanning intraoperatively for the distinction of fresh tumor specimens in the lung. A total of 12 ex vivo lung specimens from six patients were enrolled. Three patients were diagnosed with invasive adenocarcinoma (IA), while the others were benign. After OCT-imaged reconstruction, we compared the qualitative morphology of OCT and histology among malignant, benign, and normal tissues. In addition, through analysis of the quantitative data, a discrete difference in optical attenuation coefficients around the junctional surface was shown by our data processing. This study demonstrated a feasible OCT-assisted resection guide by a rapid on-site tumor diagnosis. The results indicate that future deep learning of OCT-captured image systems able to improve diagnostic and therapeutic efficiency is warranted.
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Affiliation(s)
- Hung-Chang Liu
- Department of Thoracic Surgery, Mackay Memorial Hospital, Taipei City, Taiwan
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
- Department of Nursing, Mackay Junior College of Medicine, Nursing, and Management, Taipei City, Taiwan
| | - Miao-Hui Lin
- Biomedical Optical Imaging Lab, Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu City, Taiwan
| | - Ching-Heng Ting
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
- Department of Nursing, Mackay Junior College of Medicine, Nursing, and Management, Taipei City, Taiwan
- Department of Pathology, Mackay Memorial Hospital, New Taipei City, Taiwan
| | - Yi-Min Wang
- Biomedical Optical Imaging Lab, Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu City, Taiwan
| | - Chia-Wei Sun
- Biomedical Optical Imaging Lab, Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu City, Taiwan
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
- Medical Device Innovation and Translation Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
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Xu W, Wang H. Using beam-offset optical coherence tomography to reconstruct backscattered photon profiles in scattering media. BIOMEDICAL OPTICS EXPRESS 2022; 13:6124-6135. [PMID: 36733762 PMCID: PMC9872868 DOI: 10.1364/boe.469082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/10/2022] [Accepted: 10/09/2022] [Indexed: 06/18/2023]
Abstract
Raster scanning imaging technologies capture least scattered photons (LSPs) and reject multiple scattered photons (MSPs) in backscattered photons to image the underlying structures of a scattering medium. However, MSPs can still squeeze into the images, resulting in limited imaging depth, degraded contrast, and significantly reduced lateral resolution. Great efforts have been made to understand how MSPs affect imaging performance through modeling, but the techniques for visualizing the backscattered photon profile (BSPP) in scattering media during imaging are unavailable. Here, a method of reconstructing BSPP is demonstrated using beam-offset optical coherence tomography (OCT), in which OCT images are acquired at offset positions from the illumination beam. The separation of LSPs and MSPs based on the BSPP enables quantification of imaging depth, contrast, and lateral resolution, as well as access to the depth-resolved modulated transfer function (MTF). This approach presents great opportunities for better retrieving tissue optical properties, correctly interpreting images, or directly using MTF as the feedback for adaptive optical imaging.
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Affiliation(s)
- Weiming Xu
- The Department of Chemical, Paper, and Biomedical Engineering, Miami University, Oxford, 45056 OH, USA
- The Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Hui Wang
- The Department of Chemical, Paper, and Biomedical Engineering, Miami University, Oxford, 45056 OH, USA
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Neubrand LB, van Leeuwen TG, Faber DJ. Precision of attenuation coefficient measurements by optical coherence tomography. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:085001. [PMID: 35945668 PMCID: PMC9360497 DOI: 10.1117/1.jbo.27.8.085001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
SIGNIFICANCE Optical coherence tomography (OCT) is an interferometric imaging modality, which provides tomographic information on the microscopic scale. Furthermore, OCT signal analysis facilitates quantification of tissue optical properties (e.g., the attenuation coefficient), which provides information regarding the structure and organization of tissue. However, a rigorous and standardized measure of the precision of the OCT-derived optical properties, to date, is missing. AIM We present a robust theoretical framework, which provides the Cramér -Rao lower bound σμOCT for the precision of OCT-derived optical attenuation coefficients. APPROACH Using a maximum likelihood approach and Fisher information, we derive an analytical solution for σμOCT when the position and depth of focus are known. We validate this solution, using simulated OCT signals, for which attenuation coefficients are extracted using a least-squares fitting procedure. RESULTS Our analytical solution is in perfect agreement with simulated data without shot noise. When shot noise is present, we show that the analytical solution still holds for signal-to-noise ratios (SNRs) in the fitting window being above 20 dB. For other cases (SNR<20 dB, focus position not precisely known), we show that the numerical calculation of the precision agrees with the σμOCT derived from simulated signals. CONCLUSIONS Our analytical solution provides a fast, rigorous, and easy-to-use measure for OCT-derived attenuation coefficients for signals above 20 dB. The effect of uncertainties in the focal point position on the precision in the attenuation coefficient, the second assumption underlying our analytical solution, is also investigated by numerical calculation of the lower bounds. This method can be straightforwardly extended to uncertainty in other system parameters.
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Affiliation(s)
- Linda B. Neubrand
- Amsterdam UMC, Location AMC, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Atherosclerosis and Ischemic Syndromes, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Imaging and Biomarkers, Amsterdam, The Netherlands
| | - Ton G. van Leeuwen
- Amsterdam UMC, Location AMC, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Atherosclerosis and Ischemic Syndromes, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Imaging and Biomarkers, Amsterdam, The Netherlands
| | - Dirk J. Faber
- Amsterdam UMC, Location AMC, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Atherosclerosis and Ischemic Syndromes, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Imaging and Biomarkers, Amsterdam, The Netherlands
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10
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Zhang R, Fan Y, Qi W, Wang A, Tang X, Gao T. Current research and future prospects of IVOCT imaging-based detection of the vascular lumen and vulnerable plaque. JOURNAL OF BIOPHOTONICS 2022; 15:e202100376. [PMID: 35139263 DOI: 10.1002/jbio.202100376] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/17/2022] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
Intravascular optical coherence tomography (IVOCT) is an imaging method that has developed rapidly in recent years and is useful in coronary atherosclerosis diagnosis. It is widely used in the assessment of vulnerable plaque. This review summarizes the main research methods used in recent years for blood vessel lumen boundary detection and segmentation and vulnerable plaque segmentation and classification. This article aims to comprehensively and systematically introduce the research progress on internal tissues of blood vessels based on IVOCT images. The characteristics and advantages of various methods have been summarized to provide theoretical ideas and methods for the reference of relevant researchers and scholars.
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Affiliation(s)
- Ruolin Zhang
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Yingwei Fan
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
| | - Wenliu Qi
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Ancong Wang
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Xiaoying Tang
- School of Life Science, Beijing Institute of Technology, Beijing, China
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
| | - Tianxin Gao
- School of Life Science, Beijing Institute of Technology, Beijing, China
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11
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Kamal AM, Pal UM, Kumar A, Das GR, Pandya HJ. Toward the development of portable light emitting diode-based polarization spectroscopy tools for breast cancer diagnosis. JOURNAL OF BIOPHOTONICS 2022; 15:e202100282. [PMID: 34846777 DOI: 10.1002/jbio.202100282] [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: 09/08/2021] [Revised: 11/24/2021] [Accepted: 11/26/2021] [Indexed: 06/13/2023]
Abstract
A robust, affordable and portable light emitting diode-based diagnostic tools (POLS-NIRDx) using a polarization-sensitive (linear as well as circular polarization) technique were designed and developed to quantify the degree of linear polarization (DOLP), degree of circular polarization (DOCP). The study was performed on malignant (invasive ductal carcinoma) and adjacent normal ex-vivo biopsy tissues excised from N = 10 patients at the operating wavelengths of 850 and 940 nm. The average DOLP and DOCP values were lower for malignant than adjacent normal while operating at 850 and 940 nm. The highest accuracy was observed for DOLP (100%) and DOCP (80%) while operating at 850 nm, which reduced (80% for DOLP and 65% for DOCP) at 940 nm. This pilot study can be utilized as a differentiating factor to delineate malignant tissues from adjacent normal tissues.
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Affiliation(s)
- Arif Mohd Kamal
- Department of Electronic Systems Engineering, Indian Institute of Science, Bangalore, India
| | - Uttam M Pal
- Department of Electronic Systems Engineering, Indian Institute of Science, Bangalore, India
| | - Adithya Kumar
- Department of Electronic Systems Engineering, Indian Institute of Science, Bangalore, India
| | - Gunabhi Ram Das
- Department of Surgery, Assam Medical College, Dibrugarh, India
| | - Hardik J Pandya
- Department of Electronic Systems Engineering, Indian Institute of Science, Bangalore, India
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12
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Trout RM, Gnanatheepam E, Gado A, Reik C, Ramella-Roman JC, Hunter M, Schnelldorfer T, Georgakoudi I. Polarization enhanced laparoscope for improved visualization of tissue structural changes associated with peritoneal cancer metastasis. BIOMEDICAL OPTICS EXPRESS 2022; 13:571-589. [PMID: 35284190 PMCID: PMC8884200 DOI: 10.1364/boe.443926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/17/2021] [Accepted: 12/20/2021] [Indexed: 06/03/2023]
Abstract
A polarization enhanced laparoscopy (PEL) imaging system was developed to examine the feasibility of utilizing PEL to augment conventional white light laparoscopy (WLL) in the visualization of peritoneal cancer metastases. The system includes a modified tip to illuminate tissue with linearly polarized light and elements in the detection path enabling recording of corresponding images linearly co- and cross-polarized relative to the incident light. WLL and PEL images from optical tissue phantoms with features of distinct scattering cross-section confirm the enhanced sensitivity of PEL to such characteristics. Additional comparisons based on images acquired from collagen gels with different levels of fiber alignment highlight another source of PEL contrast. Finally, PEL and WLL images of ex vivo human tissue illustrate the potential of PEL to improve visualization of cancerous tissue surrounded by healthy peritoneum. Given the simplicity of the approach and its potential for seamless integration with current clinical practice, our results provide motivation for clinical translation.
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Affiliation(s)
- Robert M. Trout
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA 01255, USA
| | - Einstein Gnanatheepam
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA 01255, USA
| | - Ahmed Gado
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA 01255, USA
| | - Christopher Reik
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA 01255, USA
| | | | - Martin Hunter
- Department of Biomedical Engineering, University of Massachusetts at Amherst, Amherst, MA, USA
| | - Thomas Schnelldorfer
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA 01255, USA
- Division of Surgical Oncology, Tufts Medical Center, 800 Washington St, Boston, MA 02111, USA
- Contributed equally
| | - Irene Georgakoudi
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA 01255, USA
- Contributed equally
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13
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Głowacki MJ, Kamińska AM, Gnyba M, Pluciński J, Strąkowski MR. The Optical Coherence Tomography and Raman Spectroscopy for Sensing of the Bone Demineralization Process. SENSORS (BASEL, SWITZERLAND) 2021; 21:6468. [PMID: 34640787 PMCID: PMC8512234 DOI: 10.3390/s21196468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/20/2021] [Accepted: 09/22/2021] [Indexed: 12/05/2022]
Abstract
The presented research was intended to seek new optical methods to investigate the demineralization process of bones. Optical examination of the bone condition could facilitate clinical trials and improve the safety of patients. The authors used a set of complementary methods: polarization-sensitive optical coherence tomography (PS-OCT) and Raman spectroscopy. Chicken bone samples were used in this research. To stimulate in laboratory conditions the process of demineralization and gradual removal of the hydroxyapatite, the test samples of bones were placed into 10% acetic acid. Measurements were carried out in two series. The first one took two weeks with data acquired every day. In the second series, the measurements were made during one day at an hourly interval (after 1, 2, 3, 5, 7, 10, and 24 h). The relation between the content of hydroxyapatite and images recorded using OCT was analyzed and discussed. Moreover, the polarization properties of the bones, including retardation angles of the bones, were evaluated. Raman measurement confirmed the disappearance of the hydroxyapatite and the speed of this process. This work presents the results of the preliminary study on the possibility of measuring changes in bone mineralization by means of the proposed methods and confirms their potential for practical use in the future.
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Affiliation(s)
| | | | | | | | - Marcin R. Strąkowski
- Department of Metrology and Optoelectronics, Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, 11/12 G. Narutowicza Str., 80-233 Gdańsk, Poland; (M.J.G.); (A.M.K.); (M.G.); (J.P.)
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14
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Bayesian analysis of depth resolved OCT attenuation coefficients. Sci Rep 2021; 11:2263. [PMID: 33500435 PMCID: PMC7838413 DOI: 10.1038/s41598-021-81713-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 11/20/2020] [Indexed: 12/24/2022] Open
Abstract
Optical coherence tomography (OCT) is an optical technique which allows for volumetric visualization of the internal structures of translucent materials. Additional information can be gained by measuring the rate of signal attenuation in depth. Techniques have been developed to estimate the rate of attenuation on a voxel by voxel basis. This depth resolved attenuation analysis gives insight into tissue structure and organization in a spatially resolved way. However, the presence of speckle in the OCT measurement causes the attenuation coefficient image to contain unrealistic fluctuations and makes the reliability of these images at the voxel level poor. While the distribution of speckle in OCT images has appeared in literature, the resulting voxelwise corruption of the attenuation analysis has not. In this work, the estimated depth resolved attenuation coefficient from OCT data with speckle is shown to be approximately exponentially distributed. After this, a prior distribution for the depth resolved attenuation coefficient is derived for a simple system using statistical mechanics. Finally, given a set of depth resolved estimates which were made from OCT data in the presence of speckle, a posterior probability distribution for the true voxelwise attenuation coefficient is derived and a Bayesian voxelwise estimator for the coefficient is given. These results are demonstrated in simulation and validated experimentally.
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15
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Yang J, Chen IA, Chang S, Tang J, Lee B, Kılıç K, Sunil S, Wang H, Varadarajan D, Magnain C, Chen SC, Costantini I, Pavone F, Fischl B, Boas DA. Improving the characterization of ex vivo human brain optical properties using high numerical aperture optical coherence tomography by spatially constraining the confocal parameters. NEUROPHOTONICS 2020; 7:045005. [PMID: 33094126 PMCID: PMC7575831 DOI: 10.1117/1.nph.7.4.045005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 09/30/2020] [Indexed: 05/24/2023]
Abstract
Significance: The optical properties of biological samples provide information about the structural characteristics of the tissue and any changes arising from pathological conditions. Optical coherence tomography (OCT) has proven to be capable of extracting tissue's optical properties using a model that combines the exponential decay due to tissue scattering and the axial point spread function that arises from the confocal nature of the detection system, particularly for higher numerical aperture (NA) measurements. A weakness in estimating the optical properties is the inter-parameter cross-talk between tissue scattering and the confocal parameters defined by the Rayleigh range and the focus depth. Aim: In this study, we develop a systematic method to improve the characterization of optical properties with high-NA OCT. Approach: We developed a method that spatially parameterizes the confocal parameters in a previously established model for estimating the optical properties from the depth profiles of high-NA OCT. Results: The proposed parametrization model was first evaluated on a set of intralipid phantoms and then validated using a low-NA objective in which cross-talk from the confocal parameters is negligible. We then utilize our spatially parameterized model to characterize optical property changes introduced by a tissue index matching process using a simple immersion agent, 2,2'-thiodiethonal. Conclusions: Our approach improves the confidence of parameter estimation by reducing the degrees of freedom in the non-linear fitting model.
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Affiliation(s)
- Jiarui Yang
- Boston University, Department of Biomedical Engineering, Boston, United States
| | - Ichun Anderson Chen
- Boston University, Department of Biomedical Engineering, Boston, United States
| | - Shuaibin Chang
- Boston University, Department of Electrical and Computer Engineering, Boston, United States
| | - Jianbo Tang
- Boston University, Department of Biomedical Engineering, Boston, United States
| | - Blaire Lee
- Boston University, Department of Biomedical Engineering, Boston, United States
| | - Kıvılcım Kılıç
- Boston University, Department of Biomedical Engineering, Boston, United States
| | - Smrithi Sunil
- Boston University, Department of Biomedical Engineering, Boston, United States
| | - Hui Wang
- Massachusetts General Hospital, A.A. Martinos Center for Biomedical Imaging, Department of Radiology, Boston, United States
| | - Divya Varadarajan
- Massachusetts General Hospital, A.A. Martinos Center for Biomedical Imaging, Department of Radiology, Boston, United States
| | - Caroline Magnain
- Massachusetts General Hospital, A.A. Martinos Center for Biomedical Imaging, Department of Radiology, Boston, United States
| | - Shih-Chi Chen
- The Chinese University of Hong Kong, Department of Mechanical Engineering, Hong Kong Special Administrative Region, China
| | - Irene Costantini
- University of Florence, European Laboratory for Non-Linear Spectroscopy, Sesto Fiorentino, Florence, Italy
- National Research Council, National Institute of Optics, Italy
| | - Francesco Pavone
- University of Florence, European Laboratory for Non-Linear Spectroscopy, Sesto Fiorentino, Florence, Italy
| | - Bruce Fischl
- Massachusetts General Hospital, A.A. Martinos Center for Biomedical Imaging, Department of Radiology, Boston, United States
- Health Science and Technology/Computer Science & Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States
| | - David A. Boas
- Boston University, Department of Biomedical Engineering, Boston, United States
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16
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Carpaij OA, Goorsenberg AWM, d’Hooghe JNS, de Bruin DM, van den Elzen RM, Nawijn MC, Annema JT, van den Berge M, Bonta PI, Burgess JK. Optical Coherence Tomography Intensity Correlates with Extracellular Matrix Components in the Airway Wall. Am J Respir Crit Care Med 2020; 202:762-766. [DOI: 10.1164/rccm.201908-1512le] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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17
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Piao D. On the stress-induced photon emission from organism: I, will the scattering-limited delay affect the temporal course? SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03346-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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18
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Kansal S, Bhattacharya J, Srivastava V. Automated full-field polarization-sensitive optical coherence tomography diagnostic systems for breast cancer. APPLIED OPTICS 2020; 59:7688-7693. [PMID: 32902470 DOI: 10.1364/ao.396592] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 07/24/2020] [Indexed: 06/11/2023]
Abstract
Intraoperative delineation of breast cancer is a major challenge. An effective breast tissue screening technique may reduce the risk of re-excision during surgery by specifically identifying positive margins. In this study, a high-resolution automated full-field polarization-sensitive optical coherence tomography (FF-PS-OCT) system was developed to classify healthy and malignant human breast tissue from quantitative phase retardation information of the tissues in ex vivo. Twelve breast tissue samples [four healthy, eight malignant (cancerous)] were imaged with the FF-PS-OCT system and the different phase features were extracted from the acquired OCT images (106), based on the differences in the optical signatures of the healthy and malignant tissues. A linear support vector model classifier was trained using 75 images, with a sensitivity of 92.10% and specificity of 89.18% was achieved. Thirty-one images were used to test the model, with a sensitivity of 90.90% and specificity of 85.0% achieved.
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19
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Gong P, Almasian M, van Soest G, de Bruin DM, van Leeuwen TG, Sampson DD, Faber DJ. Parametric imaging of attenuation by optical coherence tomography: review of models, methods, and clinical translation. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:1-34. [PMID: 32246615 PMCID: PMC7118361 DOI: 10.1117/1.jbo.25.4.040901] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 02/28/2020] [Indexed: 05/07/2023]
Abstract
SIGNIFICANCE Optical coherence tomography (OCT) provides cross-sectional and volumetric images of backscattering from biological tissue that reveal the tissue morphology. The strength of the scattering, characterized by an attenuation coefficient, represents an alternative and complementary tissue optical property, which can be characterized by parametric imaging of the OCT attenuation coefficient. Over the last 15 years, a multitude of studies have been reported seeking to advance methods to determine the OCT attenuation coefficient and developing them toward clinical applications. AIM Our review provides an overview of the main models and methods, their assumptions and applicability, together with a survey of preclinical and clinical demonstrations and their translation potential. RESULTS The use of the attenuation coefficient, particularly when presented in the form of parametric en face images, is shown to be applicable in various medical fields. Most studies show the promise of the OCT attenuation coefficient in differentiating between tissues of clinical interest but vary widely in approach. CONCLUSIONS As a future step, a consensus on the model and method used for the determination of the attenuation coefficient is an important precursor to large-scale studies. With our review, we hope to provide a basis for discussion toward establishing this consensus.
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Affiliation(s)
- Peijun Gong
- The University of Western Australia, Department of Electrical, Electronic and Computer Engineering, Optical+Biomedical Engineering Laboratory, Perth, Western Australia, Australia
- Address all correspondence to Peijun Gong, E-mail:
| | - Mitra Almasian
- University of Amsterdam, Amsterdam University Medical Centers, Cancer Center Amsterdam, Amsterdam Cardiovascular Sciences, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
| | - Gijs van Soest
- Erasmus MC, University Medical Center Rotterdam, Department of Cardiology, Rotterdam, The Netherlands
| | - Daniel M. de Bruin
- University of Amsterdam, Amsterdam University Medical Centers, Cancer Center Amsterdam, Amsterdam Cardiovascular Sciences, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
| | - Ton G. van Leeuwen
- University of Amsterdam, Amsterdam University Medical Centers, Cancer Center Amsterdam, Amsterdam Cardiovascular Sciences, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
| | - David D. Sampson
- The University of Western Australia, Department of Electrical, Electronic and Computer Engineering, Optical+Biomedical Engineering Laboratory, Perth, Western Australia, Australia
- University of Surrey, Surrey Biophotonics, Guildford, Surrey, United Kingdom
| | - Dirk J. Faber
- University of Amsterdam, Amsterdam University Medical Centers, Cancer Center Amsterdam, Amsterdam Cardiovascular Sciences, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
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20
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Zeng Y, Nandy S, Rao B, Li S, Hagemann AR, Kuroki LK, McCourt C, Mutch DG, Powell MA, Hagemann IS, Zhu Q. Histogram analysis of en face scattering coefficient map predicts malignancy in human ovarian tissue. JOURNAL OF BIOPHOTONICS 2019; 12:e201900115. [PMID: 31304678 PMCID: PMC7982142 DOI: 10.1002/jbio.201900115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 06/22/2019] [Accepted: 07/11/2019] [Indexed: 05/18/2023]
Abstract
Ovarian cancer is a heterogeneous disease at the molecular and histologic level. Optical coherence tomography (OCT) is able to map ovarian tissue optical properties and heterogeneity, which has been proposed as a feature to aid in diagnosis of ovarian cancer. In this manuscript, depth-resolved en face scattering maps of malignant ovaries, benign ovaries, and benign fallopian tubes obtained from 20 patients are provided to visualize the heterogeneity of ovarian tissues. Six features are extracted from histograms of scattering maps. All features are able to statistically distinguish benign from malignant ovaries. Two prediction models were constructed based on these features: a logistic regression model (LR) and a support vector machine (SVM). The optimal set of features is mean scattering coefficient and scattering map entropy. The LR achieved a sensitivity and specificity of 97.0% and 97.8%, and SVM demonstrated a sensitivity and specificity of 99.6% and 96.4%. Our initial results demonstrate the feasibility of using OCT as an "optical biopsy tool" for detecting the microscopic scattering changes associated with neoplasia in human ovarian tissue.
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Affiliation(s)
- Yifeng Zeng
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri
| | - Sreyankar Nandy
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri
| | - Bin Rao
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri
| | - Shuying Li
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri
| | - Andrea R. Hagemann
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, Missouri
| | - Lindsay K. Kuroki
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, Missouri
| | - Carolyn McCourt
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, Missouri
| | - David G. Mutch
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, Missouri
| | - Matthew A. Powell
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, Missouri
| | - Ian S. Hagemann
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, Missouri
| | - Quing Zhu
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri
- Correspondence Dr. Quing Zhu, Department of Biomedical Engineering, Washington University, St. Louis, MO 63110.
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21
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Rao B, Leng X, Zeng Y, Lin Y, Chen R, Zhou Q, Hagemann AR, Kuroki LM, McCourt CK, Mutch DG, Powell MA, Hagemann IS, Zhu Q. Optical Resolution Photoacoustic Microscopy of Ovary and Fallopian Tube. Sci Rep 2019; 9:14306. [PMID: 31586106 PMCID: PMC6778126 DOI: 10.1038/s41598-019-50743-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 09/16/2019] [Indexed: 12/26/2022] Open
Abstract
Ovarian cancer is the leading cause of death among gynecological cancers, but is poorly amenable to preoperative diagnosis. In this study, we investigate the feasibility of "optical biopsy," using high-optical-resolution photoacoustic microscopy (OR-PAM) to quantify the microvasculature of ovarian and fallopian tube tissue. The technique is demonstrated using excised human ovary and fallopian tube specimens imaged immediately after surgery. Quantitative parameters are derived using Amira software. The parameters include three-dimensional vascular segment count, total volume and length, which are associated with tumor angiogenesis. Qualitative results of OR-PAM demonstrate that malignant ovarian tissue has larger and more tortuous blood vessels as well as smaller vessels of different sizes, while benign and normal ovarian tissue has smaller vessels of uniform size. Quantitative analysis shows that malignant ovaries have greater tumor vessel volume, length and number of segments, as compared with benign and normal ovaries. The vascular pattern of benign fallopian tube is different than that of benign ovarian tissue. Our initial results demonstrate the potential of OR-PAM as an imaging tool for fast assessment of ovarian tissue and fallopian tube and could avoid unnecessary surgery if the risk of the examined ovary is extremely low.
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Affiliation(s)
- Bin Rao
- Biomedical Engineering, Washington University, St Louis, MO, 63130, USA
- Applied Bioptics LLC, St Louis, MO, 63146, USA
| | - Xiandong Leng
- Biomedical Engineering, Washington University, St Louis, MO, 63130, USA
| | - Yifeng Zeng
- Biomedical Engineering, Washington University, St Louis, MO, 63130, USA
| | - Yixiao Lin
- Biomedical Engineering, Washington University, St Louis, MO, 63130, USA
| | - Ruimin Chen
- Department of Biomedical Engineering and Ophthalmology, University of Southern California, Los Angeles, CA, 90089, USA
| | - Qifa Zhou
- Department of Biomedical Engineering and Ophthalmology, University of Southern California, Los Angeles, CA, 90089, USA
| | - Andrea R Hagemann
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Lindsay M Kuroki
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Carolyn K McCourt
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - David G Mutch
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Matthew A Powell
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Ian S Hagemann
- Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Quing Zhu
- Biomedical Engineering, Washington University, St Louis, MO, 63130, USA.
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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22
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Chang S, Bowden AK. Review of methods and applications of attenuation coefficient measurements with optical coherence tomography. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-17. [PMID: 31520468 PMCID: PMC6997582 DOI: 10.1117/1.jbo.24.9.090901] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 08/16/2019] [Indexed: 05/03/2023]
Abstract
The optical attenuation coefficient (AC), an important tissue parameter that measures how quickly incident light is attenuated when passing through a medium, has been shown to enable quantitative analysis of tissue properties from optical coherence tomography (OCT) signals. Successful extraction of this parameter would facilitate tissue differentiation and enhance the diagnostic value of OCT. In this review, we discuss the physical and mathematical basis of AC extraction from OCT data, including current approaches used in modeling light scattering in tissue and in AC estimation. We also report on demonstrated clinical applications of the AC, such as for atherosclerotic tissue characterization, malignant lesion detection, and brain injury visualization. With current studies showing AC analysis as a promising technique, further efforts in the development of methods to accurately extract the AC and to explore its potential use for more extensive clinical applications are desired.
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Affiliation(s)
- Shuang Chang
- Vanderbilt University, Vanderbilt Biophotonics Center, Department of Biomedical Engineering, Nashville, Tennessee, United States
| | - Audrey K. Bowden
- Vanderbilt University, Vanderbilt Biophotonics Center, Department of Biomedical Engineering, Nashville, Tennessee, United States
- Address all correspondence to Audrey K. Bowden, E-mail:
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23
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Zeng Y, Rao B, Chapman WC, Nandy S, Rais R, González I, Chatterjee D, Mutch M, Zhu Q. The Angular Spectrum of the Scattering Coefficient Map Reveals Subsurface Colorectal Cancer. Sci Rep 2019; 9:2998. [PMID: 30816153 PMCID: PMC6395629 DOI: 10.1038/s41598-019-39146-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 01/14/2019] [Indexed: 12/11/2022] Open
Abstract
Colorectal cancer diagnosis currently relies on histological detection of endoluminal neoplasia in biopsy specimens. However, clinical visual endoscopy provides no quantitative subsurface cancer information. In this ex vivo study of nine fresh human colon specimens, we report the first use of quantified subsurface scattering coefficient maps acquired by swept-source optical coherence tomography to reveal subsurface abnormities. We generate subsurface scattering coefficient maps with a novel wavelet-based-curve-fitting method that provides significantly improved accuracy. The angular spectra of scattering coefficient maps of normal tissues exhibit a spatial feature distinct from those of abnormal tissues. An angular spectrum index to quantify the differences between the normal and abnormal tissues is derived, and its strength in revealing subsurface cancer in ex vivo samples is statistically analyzed. The study demonstrates that the angular spectrum of the scattering coefficient map can effectively reveal subsurface colorectal cancer and potentially provide a fast and more accurate diagnosis.
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Affiliation(s)
- Yifeng Zeng
- Department of Biomedical Engineering, Washington University, St. Louis, MO, USA
| | - Bin Rao
- Department of Biomedical Engineering, Washington University, St. Louis, MO, USA
| | - William C Chapman
- Department of Surgery, Section of Colon and Rectal Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Sreyankar Nandy
- Department of Biomedical Engineering, Washington University, St. Louis, MO, USA
| | - Rehan Rais
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Iván González
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Deyali Chatterjee
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Matthew Mutch
- Department of Surgery, Section of Colon and Rectal Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Quing Zhu
- Department of Biomedical Engineering, Washington University, St. Louis, MO, USA.
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA.
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van Manen L, Dijkstra J, Boccara C, Benoit E, Vahrmeijer AL, Gora MJ, Mieog JSD. The clinical usefulness of optical coherence tomography during cancer interventions. J Cancer Res Clin Oncol 2018; 144:1967-1990. [PMID: 29926160 PMCID: PMC6153603 DOI: 10.1007/s00432-018-2690-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 06/16/2018] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Tumor detection and visualization plays a key role in the clinical workflow of a patient with suspected cancer, both in the diagnosis and treatment. Several optical imaging techniques have been evaluated for guidance during oncological interventions. Optical coherence tomography (OCT) is a technique which has been widely evaluated during the past decades. This review aims to determine the clinical usefulness of OCT during cancer interventions focussing on qualitative features, quantitative features and the diagnostic value of OCT. METHODS A systematic literature search was performed for articles published before May 2018 using OCT in the field of surgical oncology. Based on these articles, an overview of the clinical usefulness of OCT was provided per tumor type. RESULTS A total of 785 articles were revealed by our search, of which a total of 136 original articles were available for analysis, which formed the basis of this review. OCT is currently utilised for both preoperative diagnosis and intraoperative detection of skin, oral, lung, breast, hepatobiliary, gastrointestinal, urological, and gynaecological malignancies. It showed promising results in tumor detection on a microscopic level, especially using higher resolution imaging techniques, such as high-definition OCT and full-field OCT. CONCLUSION In the near future, OCT could be used as an additional tool during bronchoscopic or endoscopic interventions and could also be implemented in margin assessment during (laparoscopic) cancer surgery if a laparoscopic or handheld OCT device will be further developed to make routine clinical use possible.
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Affiliation(s)
- Labrinus van Manen
- Department of Surgery, Leiden University Medical Center, Albinusdreef 2, 2300 RC, Leiden, The Netherlands
| | - Jouke Dijkstra
- Division of Image Processing, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | | | | | - Alexander L Vahrmeijer
- Department of Surgery, Leiden University Medical Center, Albinusdreef 2, 2300 RC, Leiden, The Netherlands
| | - Michalina J Gora
- ICube Laboratory, CNRS, Strasbourg University, Strasbourg, France
| | - J Sven D Mieog
- Department of Surgery, Leiden University Medical Center, Albinusdreef 2, 2300 RC, Leiden, The Netherlands.
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25
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Stefan S, Jeong KS, Polucha C, Tapinos N, Toms SA, Lee J. Determination of confocal profile and curved focal plane for OCT mapping of the attenuation coefficient. BIOMEDICAL OPTICS EXPRESS 2018; 9:5084-5099. [PMID: 30319923 PMCID: PMC6179411 DOI: 10.1364/boe.9.005084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 09/18/2018] [Accepted: 09/18/2018] [Indexed: 05/05/2023]
Abstract
The attenuation coefficient has proven to be a useful tool in numerous biological applications, but accurate calculation is dependent on the characterization of the confocal effect. This study presents a method to precisely determine the confocal effect and its focal plane within a sample by examining the ratio of two optical coherence tomography (OCT) images. The method can be employed to produce a single-value estimate, or a 2D map of the focal plane accounting for the curvature or tilt within the sample. Furthermore, this method is applicable to data obtained with both high numerical aperture (NA) and low-NA lenses, thereby furthering the applicability of the attenuation coefficient to high-NA OCT data. We test and validate this method using standard samples of Intralipid 20% and 5%, improving the accuracy to 99% from 65% compared to the traditional method and preliminarily show applicability to real biological data of glioblastoma acquired in vivo in a murine model.
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Affiliation(s)
- Sabina Stefan
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island,
USA
| | - Ki-Soo Jeong
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island,
USA
| | - Collin Polucha
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island,
USA
| | - Nikos Tapinos
- Warren Alpert Medical School, Brown University, Providence, Rhode Island,
USA
- Department of Neurosurgery, Rhode Island Hospital, Providence, Rhode Island,
USA
| | - Steven A. Toms
- Warren Alpert Medical School, Brown University, Providence, Rhode Island,
USA
- Department of Neurosurgery, Rhode Island Hospital, Providence, Rhode Island,
USA
| | - Jonghwan Lee
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island,
USA
- Carney Institute for Brain Science, Brown University, Providence, Rhode Island,
USA
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26
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McClatchy DM, Rizzo EJ, Wells WA, Black CC, Paulsen KD, Kanick SC, Pogue BW. Light scattering measured with spatial frequency domain imaging can predict stromal versus epithelial proportions in surgically resected breast tissue. JOURNAL OF BIOMEDICAL OPTICS 2018; 24:1-11. [PMID: 30264552 PMCID: PMC6676039 DOI: 10.1117/1.jbo.24.7.071605] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 09/04/2018] [Indexed: 05/18/2023]
Abstract
This study aims to determine if light scatter parameters measured with spatial frequency domain imaging (SFDI) can accurately predict stromal, epithelial, and adipose fractions in freshly resected, unstained human breast specimens. An explicit model was developed to predict stromal, epithelial, and adipose fractions as a function of light scattering parameters, which was validated against a quantitative analysis of digitized histology slides for N = 31 specimens using leave-one-out cross-fold validation. Specimen mean stromal, epithelial, and adipose volume fractions predicted from light scattering parameters strongly correlated with those calculated from digitized histology slides (r = 0.90, 0.77, and 0.91, respectively, p-value <1 × 10 - 6). Additionally, the ratio of predicted epithelium to stroma classified malignant specimens with a sensitivity and specificity of 90% and 81%, respectively, and also classified all pixels in malignant lesions with 63% and 79%, at a threshold of 1. All specimens and pixels were classified as malignant, benign, or fat with 84% and 75% accuracy, respectively. These findings demonstrate how light scattering parameters acquired with SFDI can be used to accurately predict and spatially map stromal, epithelial, and adipose proportions in fresh unstained, human breast tissue, and suggest that these estimations could provide diagnostic value.
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Affiliation(s)
- David M. McClatchy
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire, United States
- Address all correspondence to: David M. McClatchy, E-mail:
| | - Elizabeth J. Rizzo
- Dartmouth College, Geisel School of Medicine, Department of Pathology, Hanover, New Hampshire, United States
| | - Wendy A. Wells
- Dartmouth College, Geisel School of Medicine, Department of Pathology, Hanover, New Hampshire, United States
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, United States
| | - Candice C. Black
- Dartmouth College, Geisel School of Medicine, Department of Pathology, Hanover, New Hampshire, United States
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, United States
| | - Keith D. Paulsen
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire, United States
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, United States
| | - Stephen C. Kanick
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire, United States
| | - Brian W. Pogue
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire, United States
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, United States
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27
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Takae S, Tsukada K, Maeda I, Okamoto N, Sato Y, Kondo H, Shinya K, Motani Y, Suzuki N. Preliminary human application of optical coherence tomography for quantification and localization of primordial follicles aimed at effective ovarian tissue transplantation. J Assist Reprod Genet 2018; 35:627-636. [PMID: 29607457 PMCID: PMC5949120 DOI: 10.1007/s10815-018-1166-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 03/15/2018] [Indexed: 11/09/2022] Open
Abstract
Purpose The purpose of this study was to evaluate the possible clinical application of optical coherence tomography for assessing ovarian reserve in individual specimens of human ovarian tissue for fertility preservation. Methods Ovarian tissue examination by optical coherence tomography was performed before ovarian tissue cryopreservation. Three of the four subjects had hematological disease or cancer, and they faced a threat to their fertility due to impending chemotherapy. One patient underwent ovarian tissue extraction for in vitro activation of dormant follicles as fertility treatment. Results The current full-field optical coherence tomography technique can detect primordial follicles in non-fixed and non-embedded human ovarian tissue. These images are well correlated with histological evaluation and the ovarian reserve test, including follicle counts. Conclusion It was demonstrated that optical coherence tomography could assess localization of primordial follicles and ovarian reserve in specimens of non-fixed human ovarian cortex, although optimization for examination of human ovarian tissue is needed for clinical application. Additionally, this technique holds the possibility of assessing the ovarian reserve of patients with unevaluable ovarian reserve. Trial registration number UMIN000023141
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Affiliation(s)
- Seido Takae
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki City, Kanagawa, 216-8511, Japan
| | - Kosuke Tsukada
- Graduate School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama, Kanagawa, 223-8522, Japan
| | - Ichiro Maeda
- Department of Pathology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki City, Kanagawa, 216-8511, Japan
| | - Naoki Okamoto
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki City, Kanagawa, 216-8511, Japan
| | - Yorino Sato
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki City, Kanagawa, 216-8511, Japan
| | - Haruhiro Kondo
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki City, Kanagawa, 216-8511, Japan
| | - Kiemi Shinya
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki City, Kanagawa, 216-8511, Japan
| | - Yuki Motani
- Graduate School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama, Kanagawa, 223-8522, Japan
| | - Nao Suzuki
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki City, Kanagawa, 216-8511, Japan.
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Wang H, Magnain C, Sakadžić S, Fischl B, Boas DA. Characterizing the optical properties of human brain tissue with high numerical aperture optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2017; 8:5617-5636. [PMID: 29296492 PMCID: PMC5745107 DOI: 10.1364/boe.8.005617] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 11/06/2017] [Accepted: 11/08/2017] [Indexed: 05/22/2023]
Abstract
Quantification of tissue optical properties with optical coherence tomography (OCT) has proven to be useful in evaluating structural characteristics and pathological changes. Previous studies primarily used an exponential model to analyze low numerical aperture (NA) OCT measurements and obtain the total attenuation coefficient for biological tissue. In this study, we develop a systematic method that includes the confocal parameter for modeling the depth profiles of high NA OCT, when the confocal parameter cannot be ignored. This approach enables us to quantify tissue optical properties with higher lateral resolution. The model parameter predictions for the scattering coefficients were tested with calibrated microsphere phantoms. The application of the model to human brain tissue demonstrates that the scattering and back-scattering coefficients each provide unique information, allowing us to differentially identify laminar structures in primary visual cortex and distinguish various nuclei in the midbrain. The combination of the two optical properties greatly enhances the power of OCT to distinguish intricate structures in the human brain beyond what is achievable with measured OCT intensity information alone, and therefore has the potential to enable objective evaluation of normal brain structure as well as pathological conditions in brain diseases. These results represent a promising step for enabling the quantification of tissue optical properties from high NA OCT.
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29
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Kirillin M, Motovilova T, Shakhova N. Optical coherence tomography in gynecology: a narrative review. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-9. [PMID: 29210220 DOI: 10.1117/1.jbo.22.12.121709] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 11/14/2017] [Indexed: 06/07/2023]
Abstract
Modern gynecologic practice requires noninvasive diagnostics techniques capable of detecting morphological and functional alterations in tissues of female reproductive organs. Optical coherence tomography (OCT) is a promising tool for providing imaging of biotissues with high resolution at depths up to 2 mm. Design of the customized probes provides wide opportunities for OCT use in gynecology. This paper contains a retrospective insight into the history of OCT employment in gynecology, an overview of the existing gynecologic OCT probes, including those for combination with other diagnostic modalities, and state-of-the-art application of OCT for diagnostics of tumor and nontumor pathologies of female genitalia. Perspectives of OCT both in diagnostics and treatment planning and monitoring in gynecology are overviewed.
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30
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Almasian M, van Leeuwen TG, Faber DJ. OCT Amplitude and Speckle Statistics of Discrete Random Media. Sci Rep 2017; 7:14873. [PMID: 29093480 PMCID: PMC5665955 DOI: 10.1038/s41598-017-14115-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 10/04/2017] [Indexed: 12/20/2022] Open
Abstract
Speckle, amplitude fluctuations in optical coherence tomography (OCT) images, contains information on sub-resolution structural properties of the imaged sample. Speckle statistics could therefore be utilized in the characterization of biological tissues. However, a rigorous theoretical framework relating OCT speckle statistics to structural tissue properties has yet to be developed. As a first step, we present a theoretical description of OCT speckle, relating the OCT amplitude variance to size and organization for samples of discrete random media (DRM). Starting the calculations from the size and organization of the scattering particles, we analytically find expressions for the OCT amplitude mean, amplitude variance, the backscattering coefficient and the scattering coefficient. We assume fully developed speckle and verify the validity of this assumption by experiments on controlled samples of silica microspheres suspended in water. We show that the OCT amplitude variance is sensitive to sub-resolution changes in size and organization of the scattering particles. Experimentally determined and theoretically calculated optical properties are compared and in good agreement.
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Affiliation(s)
- Mitra Almasian
- Academic Medical Center, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
| | - Ton G van Leeuwen
- Academic Medical Center, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
| | - Dirk J Faber
- Academic Medical Center, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands.
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31
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Liu S, Sotomi Y, Eggermont J, Nakazawa G, Torii S, Ijichi T, Onuma Y, Serruys PW, Lelieveldt BPF, Dijkstra J. Tissue characterization with depth-resolved attenuation coefficient and backscatter term in intravascular optical coherence tomography images. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-16. [PMID: 28901053 DOI: 10.1117/1.jbo.22.9.096004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 08/21/2017] [Indexed: 05/08/2023]
Abstract
An important application of intravascular optical coherence tomography (IVOCT) for atherosclerotic tissue analysis is using it to estimate attenuation and backscatter coefficients. This work aims at exploring the potential of the attenuation coefficient, a proposed backscatter term, and image intensities in distinguishing different atherosclerotic tissue types with a robust implementation of depth-resolved (DR) approach. Therefore, the DR model is introduced to estimate the attenuation coefficient and further extended to estimate the backscatter-related term in IVOCT images, such that values can be estimated per pixel without predefining any delineation for the estimation. In order to exclude noisy regions with a weak signal, an automated algorithm is implemented to determine the cut-off border in IVOCT images. The attenuation coefficient, backscatter term, and the image intensity are further analyzed in regions of interest, which have been delineated referring to their pathology counterparts. Local statistical values were reported and their distributions were further compared with a two-sample t-test to evaluate the potential for distinguishing six types of tissues. Results show that the IVOCT intensity, DR attenuation coefficient, and backscatter term extracted with the reported implementation are complementary to each other on characterizing six tissue types: mixed, calcification, fibrous, lipid-rich, macrophages, and necrotic core.
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Affiliation(s)
- Shengnan Liu
- Leiden University Medical Center, Division of Imaging Processing, Department of Radiology, Leiden, The Netherlands
| | - Yohei Sotomi
- University of Amsterdam, Academic Medical Center, Amsterdam, The Netherlands
| | - Jeroen Eggermont
- Leiden University Medical Center, Division of Imaging Processing, Department of Radiology, Leiden, The Netherlands
| | - Gaku Nakazawa
- Tokai University School of Medicine, Department of Cardiology, Kanaagawa, Japan
| | - Sho Torii
- Tokai University School of Medicine, Department of Cardiology, Kanaagawa, Japan
| | - Takeshi Ijichi
- Tokai University School of Medicine, Department of Cardiology, Kanaagawa, Japan
| | - Yoshinobu Onuma
- Thoraxcenter, Erasmus Medical Center, Rotterdam, The Netherlands
- Cardialysis, Rotterdam, The Netherlands
| | - Patrick W Serruys
- International Centre for Circulatory Health, the National Heart and Lung Institute, Imperial College, United Kingdom
| | - Boudewijn P F Lelieveldt
- Leiden University Medical Center, Division of Imaging Processing, Department of Radiology, Leiden, The Netherlands
- Delft University of Technology, Department of Intelligent Systems, Delft, The Netherlands
| | - Jouke Dijkstra
- Leiden University Medical Center, Division of Imaging Processing, Department of Radiology, Leiden, The Netherlands
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32
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Accuracy and safety verification of ovarian reserve assessment technique for ovarian tissue transplantation using optical coherence tomography in mice ovary. Sci Rep 2017; 7:43550. [PMID: 28272468 PMCID: PMC5341097 DOI: 10.1038/srep43550] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 01/25/2017] [Indexed: 01/26/2023] Open
Abstract
Except for histological study, there are currently no suitable techniques available for the detection and identification of primordial follicles in ovary of primary ovarian insufficiency patients who have undetectable AMH levels. Also, the ability to locate and quantify follicles on ovarian cortex strips, without fixation, is valuable for patients who could undergo subsequent successful ovarian tissue transplantation. Although optical coherence tomography (OCT) is a well-established high resolution imaging technique without fixation commonly applied in biomedicine, few reports are available on ovarian tissue imaging. In present study, we established standard OCT follicle images at each developmental stage, including the primordial follicle, and demonstrated the efficacy of OCT to estimate IVF outcome in transplanted mice ovary like ovarian reserve tests. Unfortunately, the current commercial OCT could not be used to accurate follicle count the number of follicles for whole ovary, because the maximum depth of examination was 100 μm. And we demonstrated the safety of OCT examination, it did not affect IVF outcome and birth defect rate, and reproductive ability. Although there is room for improvement, these findings will be first step to bring OCT examination a step closer to clinical application for measuring true ovarian reserve and localizing follicles.
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Full-Field Optical Coherence Tomography as a Diagnosis Tool: Recent Progress with Multimodal Imaging. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7030236] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Santos MOD, Latrive A, De Castro PAA, De Rossi W, Zorn TMT, Samad RE, Freitas AZ, Cesar CL, Junior NDV, Zezell DM. Multimodal evaluation of ultra-short laser pulses treatment for skin burn injuries. BIOMEDICAL OPTICS EXPRESS 2017; 8:1575-1588. [PMID: 28663850 PMCID: PMC5480565 DOI: 10.1364/boe.8.001575] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/26/2017] [Accepted: 02/06/2017] [Indexed: 05/13/2023]
Abstract
Thousands of people die every year from burn injuries. The aim of this study is to evaluate the feasibility of high intensity femtosecond lasers as an auxiliary treatment of skin burns. We used an in vivo animal model and monitored the healing process using 4 different imaging modalities: histology, Optical Coherence Tomography (OCT), Second Harmonic Generation (SHG), and Fourier Transform Infrared (FTIR) spectroscopy. 3 dorsal areas of 20 anesthetized Wistar rats were burned by water vapor exposure and subsequently treated either by classical surgical debridement, by laser ablation, or left without treatment. Skin burn tissues were non-invasively characterized by OCT images and biopsied for further histopathology analysis, SHG imaging and FTIR spectroscopy at 3, 5, 7 and 14 days after burn. The laser protocol was found as efficient as the classical treatment for promoting the healing process. The study concludes to the validation of femtosecond ultra-short pulses laser treatment for skinburns, with the advantage of minimizing operatory trauma.
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Affiliation(s)
- Moises Oliveira Dos Santos
- Universidade do Estado do Amazonas, Escola Superior de Tecnologia, Manaus, AM,
Brazil
- Instituto de Pesquisas Energeticas e Nucleares, Centro de Lasers e Aplicacoes, Sao Paulo, SP,
Brazil
| | - Anne Latrive
- Instituto de Pesquisas Energeticas e Nucleares, Centro de Lasers e Aplicacoes, Sao Paulo, SP,
Brazil
| | | | - Wagner De Rossi
- Instituto de Pesquisas Energeticas e Nucleares, Centro de Lasers e Aplicacoes, Sao Paulo, SP,
Brazil
| | | | - Ricardo Elgul Samad
- Instituto de Pesquisas Energeticas e Nucleares, Centro de Lasers e Aplicacoes, Sao Paulo, SP,
Brazil
| | - Anderson Zanardi Freitas
- Instituto de Pesquisas Energeticas e Nucleares, Centro de Lasers e Aplicacoes, Sao Paulo, SP,
Brazil
| | - Carlos Lenz Cesar
- Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin, Campinas, SP,
Brazil
- Universidade Federal do Ceara, Departamento de Fisica, Fortaleza, CE,
Brazil
| | - Nilson Dias Vieira Junior
- Instituto de Pesquisas Energeticas e Nucleares, Centro de Lasers e Aplicacoes, Sao Paulo, SP,
Brazil
| | - Denise Maria Zezell
- Instituto de Pesquisas Energeticas e Nucleares, Centro de Lasers e Aplicacoes, Sao Paulo, SP,
Brazil
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Nandy S, Sanders M, Zhu Q. Classification and analysis of human ovarian tissue using full field optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2016; 7:5182-5187. [PMID: 28018734 PMCID: PMC5175561 DOI: 10.1364/boe.7.005182] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/09/2016] [Accepted: 11/09/2016] [Indexed: 05/26/2023]
Abstract
In this study, a full field optical coherence tomography (FFOCT) system was used to analyze and classify normal and malignant human ovarian tissue. 14 ovarian tissue samples (7 normal, 7 malignant) were imaged with the FFOCT system and five features were extracted by analyzing the normalized image histogram from 56 FFOCT images, based on the differences in the morphology of the normal and malignant tissue samples. A generalized linear model (GLM) classifier was trained using 36 images, and sensitivity of 95.3% and specificity of 91.1% was obtained. 20 images were used to test the model, and a sensitivity of 91.6% and specificity of 87.7% was obtained.
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Affiliation(s)
- Sreyankar Nandy
- Department of Biomedical Engineering, Washington University in St. Louis, USA
| | - Melinda Sanders
- University of Connecticut Health Center, Division of Pathology, USA
| | - Quing Zhu
- Department of Biomedical Engineering, Washington University in St. Louis, USA
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Nandy S, Mostafa A, Kumavor PD, Sanders M, Brewer M, Zhu Q. Characterizing optical properties and spatial heterogeneity of human ovarian tissue using spatial frequency domain imaging. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:101402. [PMID: 26822943 PMCID: PMC4728740 DOI: 10.1117/1.jbo.21.10.101402] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 12/17/2015] [Indexed: 05/15/2023]
Abstract
A spatial frequency domain imaging (SFDI) system was developed for characterizing ex vivo human ovarian tissue using wide-field absorption and scattering properties and their spatial heterogeneities. Based on the observed differences between absorption and scattering images of different ovarian tissue groups, six parameters were quantitatively extracted. These are the mean absorption and scattering, spatial heterogeneities of both absorption and scattering maps measured by a standard deviation, and a fitting error of a Gaussian model fitted to normalized mean Radon transform of the absorption and scattering maps. A logistic regression model was used for classification of malignant and normal ovarian tissues. A sensitivity of 95%, specificity of 100%, and area under the curve of 0.98 were obtained using six parameters extracted from the SFDI images. The preliminary results demonstrate the diagnostic potential of the SFDI method for quantitative characterization of wide-field optical properties and the spatial distribution heterogeneity of human ovarian tissue. SFDI could be an extremely robust and valuable tool for evaluation of the ovary and detection of neoplastic changes of ovarian cancer.
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Affiliation(s)
- Sreyankar Nandy
- University of Connecticut, Biomedical Engineering Department, 371 Fairfield Way, U-4157, Storrs, Connecticut 06269-4157, United States
| | - Atahar Mostafa
- University of Connecticut, Department of Electrical and Computer Engineering, 371 Fairfield Way, U-4157, Storrs, Connecticut 06269-4157, United States
| | - Patrick D Kumavor
- University of Connecticut, Biomedical Engineering Department, 371 Fairfield Way, U-4157, Storrs, Connecticut 06269-4157, United States
| | - Melinda Sanders
- University of Connecticut Health Center, Pathology Department, Farmington, Connecticut 06030, United States
| | - Molly Brewer
- University of Connecticut Health Center, Division of Gynecologic Oncology, Farmington, Connecticut 06030, United States
| | - Quing Zhu
- University of Connecticut, Biomedical Engineering Department, 371 Fairfield Way, U-4157, Storrs, Connecticut 06269-4157, United States
- University of Connecticut, Department of Electrical and Computer Engineering, 371 Fairfield Way, U-4157, Storrs, Connecticut 06269-4157, United States
- Address all correspondence to: Quing Zhu, E-mail:
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Ratheesh KM, Prabhathan P, Seah LK, Murukeshan VM. Gold nanorods with higher aspect ratio as potential contrast agent in optical coherence tomography and for photothermal applications around 1300 nm imaging window. Biomed Phys Eng Express 2016. [DOI: 10.1088/2057-1976/2/5/055005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Computer assisted optical screening of human ovarian cancer using Raman spectroscopy. Photodiagnosis Photodyn Ther 2016; 15:94-9. [DOI: 10.1016/j.pdpdt.2016.05.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 05/22/2016] [Accepted: 05/25/2016] [Indexed: 01/04/2023]
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Tate TH, Baggett B, Rice PFS, Koevary JW, Orsinger GV, Nymeyer AC, Welge WA, Saboda K, Roe DJ, Hatch KD, Chambers SK, Utzinger U, Barton JK. Multispectral fluorescence imaging of human ovarian and fallopian tube tissue for early-stage cancer detection. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:56005. [PMID: 27220626 PMCID: PMC5996865 DOI: 10.1117/1.jbo.21.5.056005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 04/25/2016] [Indexed: 05/17/2023]
Abstract
With early detection, 5-year survival rates for ovarian cancer exceed 90%, yet no effective early screening method exists. Emerging consensus suggests over 50% of the most lethal form of the disease originates in the fallopian tube. Twenty-eight women undergoing oophorectomy or debulking surgery provided informed consent for the use of surgical discard tissue samples for multispectral fluorescence imaging. Using multiple ultraviolet and visible excitation wavelengths and emissions bands, 12 fluorescence and 6 reflectance images of 47 ovarian and 31 fallopian tube tissue samples were recorded. After imaging, each sample was fixed, sectioned, and stained for pathological evaluation. Univariate logistic regression showed cancerous tissue samples had significantly lower intensity than noncancerous tissue for 17 image types. The predictive power of multiple image types was evaluated using multivariate logistic regression (MLR) and quadratic discriminant analysis (QDA). Two MLR models each using two image types had receiver operating characteristic curves with area under the curve exceeding 0.9. QDA determined 56 image type combinations with perfect resubstituting using as few as five image types. Adaption of the system for future in vivo fallopian tube and ovary endoscopic imaging is possible, which may enable sensitive detection of ovarian cancer with no exogenous contrast agents.
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Affiliation(s)
- Tyler H. Tate
- University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721, United States
| | - Brenda Baggett
- University of Arizona, Department of Biomedical Engineering, 1657 East Helen Street, Tucson, Arizona 85721, United States
| | - Photini F. S. Rice
- University of Arizona, Department of Biomedical Engineering, 1657 East Helen Street, Tucson, Arizona 85721, United States
| | - Jennifer Watson Koevary
- University of Arizona, Department of Biomedical Engineering, 1657 East Helen Street, Tucson, Arizona 85721, United States
| | - Gabriel V. Orsinger
- University of Arizona, Department of Biomedical Engineering, 1657 East Helen Street, Tucson, Arizona 85721, United States
| | - Ariel C. Nymeyer
- University of Arizona, Department of Biomedical Engineering, 1657 East Helen Street, Tucson, Arizona 85721, United States
| | - Weston A. Welge
- University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721, United States
| | - Kathylynn Saboda
- University of Arizona Cancer Center, 1515 North Campbell Avenue, Tucson, Arizona 85724, United States
| | - Denise J. Roe
- University of Arizona Cancer Center, 1515 North Campbell Avenue, Tucson, Arizona 85724, United States
| | - Kenneth D. Hatch
- University of Arizona Cancer Center, 1515 North Campbell Avenue, Tucson, Arizona 85724, United States
| | - Setsuko K. Chambers
- University of Arizona Cancer Center, 1515 North Campbell Avenue, Tucson, Arizona 85724, United States
| | - Urs Utzinger
- University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721, United States
- University of Arizona, Department of Biomedical Engineering, 1657 East Helen Street, Tucson, Arizona 85721, United States
| | - Jennifer Kehlet Barton
- University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721, United States
- University of Arizona, Department of Biomedical Engineering, 1657 East Helen Street, Tucson, Arizona 85721, United States
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Smith GT, Dwork N, O’Connor D, Sikora U, Lurie KL, Pauly JM, Ellerbee AK. Automated, Depth-Resolved Estimation of the Attenuation Coefficient From Optical Coherence Tomography Data. IEEE TRANSACTIONS ON MEDICAL IMAGING 2015; 34:2592-602. [PMID: 26126286 PMCID: PMC4714956 DOI: 10.1109/tmi.2015.2450197] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We present a method for automated, depth-resolved extraction of the attenuation coefficient from Optical Coherence Tomography (OCT) data. In contrast to previous automated, depth-resolved methods, the Depth-Resolved Confocal (DRC) technique derives an invertible mapping between the measured OCT intensity data and the attenuation coefficient while considering the confocal function and sensitivity fall-off, which are critical to ensure accurate measurements of the attenuation coefficient in practical settings (e.g., clinical endoscopy). We also show that further improvement of the estimated attenuation coefficient is possible by formulating image denoising as a convex optimization problem that we term Intensity Weighted Horizontal Total Variation (iwhTV). The performance and accuracy of DRC alone and DRC+iwhTV are validated with simulated data, optical phantoms, and ex-vivo porcine tissue. Our results suggest that implementation of DRC+iwhTV represents a novel way to improve OCT contrast for better tissue characterization through quantitative imaging.
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Affiliation(s)
- Gennifer T. Smith
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA
| | - Nicholas Dwork
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA
| | - Daniel O’Connor
- Department of Mathematics, University of California, Los Angeles, CA, USA
| | - Uzair Sikora
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA
| | - Kristen L. Lurie
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA
| | - John M. Pauly
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA
| | - Audrey K. Ellerbee
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA
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41
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Kang D, Wang A, Volgger V, Chen Z, Wong BJF. Spatiotemporal correlation of optical coherence tomography in-vivo images of rabbit airway for the diagnosis of edema. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:076015. [PMID: 26222962 PMCID: PMC4518273 DOI: 10.1117/1.jbo.20.7.076015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 06/30/2015] [Indexed: 03/28/2024]
Abstract
Detection of an early stage of subglottic edema is vital for airway management and prevention of stenosis, a life-threatening condition in critically ill neonates. As an observer for the task of diagnosing edema in vivo, we investigated spatiotemporal correlation (STC) of full-range optical coherence tomography (OCT) images acquired in the rabbit airway with experimentally simulated edema. Operating the STC observer on OCT images generates STC coefficients as test statistics for the statistical decision task. Resulting from this, the receiver operating characteristic (ROC) curves for the diagnosis of airway edema with full-range OCT in-vivo images were extracted and areas under ROC curves were calculated. These statistically quantified results demonstrated the potential clinical feasibility of the STC method as a means to identify early airway edema.
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Affiliation(s)
- DongYel Kang
- Hanbat National University, College of Engineering, School of Basic Sciences, 125 DogSeoDaeRo, YuSeong-Gu, Daejeon 305-719, Republic of Korea
| | - Alex Wang
- University of California Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California 92617, United States
| | - Veronika Volgger
- Ludwig-Maximilians-University Munich, Department of Otolaryngology-Head and Neck Surgery, Marchioninistr. 15, Munich 81377, Germany
| | - Zhongping Chen
- University of California Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California 92617, United States
- University of California Irvine, Department of Biomedical Engineering, Irvine, California 92617, United States
- University of California Irvine, Department of Otolaryngology-Head and Neck Surgery, Irvine, California 92617, United States
| | - Brian J. F. Wong
- University of California Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California 92617, United States
- University of California Irvine, Department of Biomedical Engineering, Irvine, California 92617, United States
- University of California Irvine, Department of Otolaryngology-Head and Neck Surgery, Irvine, California 92617, United States
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42
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Zhou L, Wu G, Wei H, Guo Z, Yang H, He Y, Xie S, Liu Y, Meng Q. Effects of titanium dioxide nanoparticles coupled with diode laser on optical properties of in vitro normal and cancerous human lung tissues studied with optical coherence tomography and diffuse reflectance spectra. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:046003. [PMID: 25858594 DOI: 10.1117/1.jbo.20.4.046003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 03/16/2015] [Indexed: 06/04/2023]
Abstract
The objective is to investigate the effects of two different sized (60 and 100 nm) titanium dioxide (TiO2) nanoparticles (NPs) penetration and accumulation in in vitro human normal lung (NL) tissue, lung squamous cell carcinoma (LSCC) tissue, and 650-nm diode laser-pretreated tissue on their optical properties studied with optical coherence tomography monitoring and diffuse reflectance (DR) spectra measurement. As with TiO2 NPs penetrating into the tissues, the intensities of DR of the samples increase, and then the enhancements of DR and the attenuation coefficients of the tissues were quantitatively calculated. The results suggest that 650-nm diode laser pretreatment increased the amounts of TiO2 NPs penetration and accumulation in NL and LSCC tissues, and the tissue optical properties were significantly influenced by accumulation of TiO2 NPs.
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Affiliation(s)
- Lianpeng Zhou
- South China Normal University, College of Biophotonics, MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, 55 Zhongshan Road, Guangzhou, Guangdong Province 510631, China
| | - Guoyong Wu
- Sun Yat-Sen University, the First Affiliated Hospital, Department of Surgery, 58 Zhongshan 2 Road, Guangzhou, Guangdong Province 510080, China
| | - Huajiang Wei
- South China Normal University, College of Biophotonics, MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, 55 Zhongshan Road, Guangzhou, Guangdong Province 510631, China
| | - Zhouyi Guo
- South China Normal University, College of Biophotonics, MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, 55 Zhongshan Road, Guangzhou, Guangdong Province 510631, China
| | - Hongqin Yang
- Fujian Normal University, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education of China, 1 Keji Road, Fuzhou, Fujian 350007, China
| | - Yonghong He
- Tsinghua University, Graduate School at Shenzhen, 2279 Lishui Road, Shenzhen, Guangdong 518055, China
| | - Shusen Xie
- Fujian Normal University, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education of China, 1 Keji Road, Fuzhou, Fujian 350007, China
| | - Ying Liu
- South China Normal University, College of Biophotonics, MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, 55 Zhongshan Road, Guangzhou, Guangdong Province 510631, China
| | - Qingan Meng
- Southwest Institute of Technical Physics, 7 People's South Road, Chengdu, Sichuan 610041, China
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43
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Kiseleva E, Kirillin M, Feldchtein F, Vitkin A, Sergeeva E, Zagaynova E, Streltzova O, Shakhov B, Gubarkova E, Gladkova N. Differential diagnosis of human bladder mucosa pathologies in vivo with cross-polarization optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2015; 6:1464-76. [PMID: 25909028 PMCID: PMC4399683 DOI: 10.1364/boe.6.001464] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 02/14/2015] [Accepted: 02/24/2015] [Indexed: 05/03/2023]
Abstract
Quantitative image analysis and parameter extraction using a specific implementation of polarization-sensitive optical coherence tomography (OCT) provides differential diagnosis of mucosal pathologies in in-vivo human bladders. We introduce a cross-polarization (CP) OCT image metric called Integral Depolarization Factor (IDF) to enable automatic diagnosis of bladder conditions (assessment the functional state of collagen fibers). IDF-based diagnostic accuracy of identification of the severe fibrosis of normal bladder mucosa is 79%; recurrence of carcinoma on the post-operative scar is 97%; and differentiation between neoplasia and acute inflammation is 75%. The promising potential of CP OCT combined with image analysis in human urology is thus demonstrated in vivo.
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Affiliation(s)
- Elena Kiseleva
- Nizhny Novgorod State Medical Academy, 603000, Minin Square, 10/1, Nizhny Novgorod,
Russia
| | - Mikhail Kirillin
- Institute of Applied Physics RAS, 603950, Ulyanov Street, 46, Nizhny Novgorod,
Russia
- N.I. Lobachevsky State University of Nizhny Novgorod, 603950, 23 Gagarin St., Nizhny Novgorod,
Russia
| | - Felix Feldchtein
- Nizhny Novgorod State Medical Academy, 603000, Minin Square, 10/1, Nizhny Novgorod,
Russia
| | - Alex Vitkin
- Nizhny Novgorod State Medical Academy, 603000, Minin Square, 10/1, Nizhny Novgorod,
Russia
- Department of Medical Biophysics and Radiation Oncology, University of Toronto, Ontario M5G 2M9,
Canada
- Ontario Cancer Institute, University Health Network, Toronto, Ontario M5G 2M9,
Canada
| | - Ekaterina Sergeeva
- Institute of Applied Physics RAS, 603950, Ulyanov Street, 46, Nizhny Novgorod,
Russia
- N.I. Lobachevsky State University of Nizhny Novgorod, 603950, 23 Gagarin St., Nizhny Novgorod,
Russia
| | - Elena Zagaynova
- Nizhny Novgorod State Medical Academy, 603000, Minin Square, 10/1, Nizhny Novgorod,
Russia
| | - Olga Streltzova
- Nizhny Novgorod State Medical Academy, 603000, Minin Square, 10/1, Nizhny Novgorod,
Russia
| | - Boris Shakhov
- Nizhny Novgorod State Medical Academy, 603000, Minin Square, 10/1, Nizhny Novgorod,
Russia
| | - Ekaterina Gubarkova
- Nizhny Novgorod State Medical Academy, 603000, Minin Square, 10/1, Nizhny Novgorod,
Russia
| | - Natalia Gladkova
- Nizhny Novgorod State Medical Academy, 603000, Minin Square, 10/1, Nizhny Novgorod,
Russia
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44
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Su Y, Yao XS, Li Z, Meng Z, Liu T, Wang L. Measurements of the thermal coefficient of optical attenuation at different depth regions of in vivo human skins using optical coherence tomography: a pilot study. BIOMEDICAL OPTICS EXPRESS 2015; 6:500-13. [PMID: 25780740 PMCID: PMC4354582 DOI: 10.1364/boe.6.000500] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 12/21/2014] [Accepted: 12/22/2014] [Indexed: 05/18/2023]
Abstract
We present detailed measurement results of optical attenuation's thermal coefficients (referenced to the temperature of the skin surface) in different depth regions of in vivo human forearm skins using optical coherence tomography (OCT). We first design a temperature control module with an integrated optical probe to precisely control the surface temperature of a section of human skin. We propose a method of using the correlation map to identify regions in the skin having strong correlations with the surface temperature of the skin and find that the attenuation coefficient in these regions closely follows the variation of the surface temperature without any hysteresis. We observe a negative thermal coefficient of attenuation in the epidermis. While in dermis, the slope signs of the thermal coefficient of attenuation are different at different depth regions for a particular subject, however, the depth regions with a positive (or negative) slope are different in different subjects. We further find that the magnitude of the thermal coefficient of attenuation coefficient is greater in epidermis than in dermis. We believe the knowledge of such thermal properties of skins is important for several noninvasive diagnostic applications, such as OCT glucose monitoring, and the method demonstrated in this paper is effective in studying the optical and biological properties in different regions of skin.
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Affiliation(s)
- Ya Su
- Tianjin University, Polarization Research Center, College of Precision Instrument & Opto-electronics Engineering and Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin 300072,
China
| | - X. Steve Yao
- Tianjin University, Polarization Research Center, College of Precision Instrument & Opto-electronics Engineering and Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin 300072,
China
- General Photonics Corporation, 5228 Edison Avenue, Chino, California 91710,
USA
| | - Zhihong Li
- Tianjin University, Polarization Research Center, College of Precision Instrument & Opto-electronics Engineering and Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin 300072,
China
- Suzhou Opto-ring Co. Ltd., Suzhou 215123,
China
| | - Zhuo Meng
- Tianjin University, Polarization Research Center, College of Precision Instrument & Opto-electronics Engineering and Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin 300072,
China
- Suzhou Opto-ring Co. Ltd., Suzhou 215123,
China
| | - Tiegen Liu
- Tianjin University, Polarization Research Center, College of Precision Instrument & Opto-electronics Engineering and Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin 300072,
China
| | - Longzhi Wang
- Tianjin University, Polarization Research Center, College of Precision Instrument & Opto-electronics Engineering and Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin 300072,
China
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45
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Zhou F, Wei H, Ye X, Hu K, Wu G, Yang H, He Y, Xie S, Guo Z. Influence of nanoparticles accumulation on optical properties of human normal and cancerous liver tissue in vitro estimated by OCT. Phys Med Biol 2015; 60:1385-97. [PMID: 25592483 DOI: 10.1088/0031-9155/60/3/1385] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In this work, the potential use of nanoparticles as contrast agents by using spectral domain optical coherence tomography (SD-OCT) in liver tissue was demonstrated. Gold nanoparticles (average size of 25 and 70 nm), were studied in human normal and cancerous liver tissues in vitro, respectively. Each sample was monitored with SD-OCT functional imaging for 240 min. Continuous OCT monitoring showed that, after application of gold nanoparticles, the OCT signal intensities of normal liver and cancerous liver tissue both increase with time, and the larger nanoparticles tend to produce a greater signal enhancement in the same type of tissue. The results show that the values of attenuation coefficients have significant differences between normal liver tissue and cancerous liver tissue. In addition, 25 nm gold nanoparticles allow higher penetration depth than 70 nm gold nanoparticles in liver tissues.
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Affiliation(s)
- Fang Zhou
- MOE Key Laboratory of Laser Life Science & 2 SATCM Third Grade Laboratory of Chinese Medicine and Photonics Technology, College of Biophotonics, South China Normal University, Guangzhou 510631, People's Republic of China
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46
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Gargesha M, Shalev R, Prabhu D, Tanaka K, Rollins AM, Costa M, Bezerra HG, Wilson DL. Parameter estimation of atherosclerotic tissue optical properties from three-dimensional intravascular optical coherence tomography. J Med Imaging (Bellingham) 2015; 2:016001. [PMID: 26158087 DOI: 10.1117/1.jmi.2.1.016001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 11/25/2014] [Indexed: 01/17/2023] Open
Abstract
We developed robust, three-dimensional methods, as opposed to traditional A-line analysis, for estimating the optical properties of calcified, fibrotic, and lipid atherosclerotic plaques from in vivo coronary artery intravascular optical coherence tomography clinical pullbacks. We estimated attenuation [Formula: see text] and backscattered intensity [Formula: see text] from small volumes of interest annotated by experts in 35 pullbacks. Some results were as follows: noise reduction filtering was desirable, parallel line (PL) methods outperformed individual line methods, root mean square error was the best goodness-of-fit, and [Formula: see text]-trimmed PL ([Formula: see text]-T-PL) was the best overall method. Estimates of [Formula: see text] were calcified ([Formula: see text]), fibrotic ([Formula: see text]), and lipid ([Formula: see text]), similar to those in the literature, and tissue classification from optical properties alone was promising.
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Affiliation(s)
- Madhusudhana Gargesha
- Case Western Reserve University , Department of Biomedical Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Ronny Shalev
- Case Western Reserve University , Department of Electrical Engineering and Computer Science, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - David Prabhu
- Case Western Reserve University , Department of Biomedical Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Kentaro Tanaka
- University Hospitals Case Medical Center , Harrington Heart and Vascular Institute, Cardiovascular Imaging Core Laboratory, 11100 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Andrew M Rollins
- Case Western Reserve University , Department of Biomedical Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Marco Costa
- University Hospitals Case Medical Center , Harrington Heart and Vascular Institute, Cardiovascular Imaging Core Laboratory, 11100 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Hiram G Bezerra
- University Hospitals Case Medical Center , Harrington Heart and Vascular Institute, Cardiovascular Imaging Core Laboratory, 11100 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - David L Wilson
- Case Western Reserve University , Department of Biomedical Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States ; Case Western Reserve University , Department of Radiology, 11100 Euclid Avenue, Cleveland, Ohio 44106, United States
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Almasian M, Bosschaart N, van Leeuwen TG, Faber DJ. Validation of quantitative attenuation and backscattering coefficient measurements by optical coherence tomography in the concentration-dependent and multiple scattering regime. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:121314. [PMID: 26720868 DOI: 10.1117/1.jbo.20.12.121314] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 11/30/2015] [Indexed: 05/19/2023]
Abstract
Optical coherence tomography (OCT) has the potential to quantitatively measure optical properties of tissue such as the attenuation coefficient and backscattering coefficient. However, to obtain reliable values for strong scattering tissues, accurate consideration of the effects of multiple scattering and the nonlinear relation between the scattering coefficient and scatterer concentration (concentration-dependent scattering) is required. We present a comprehensive model for the OCT signal in which we quantitatively account for both effects, as well as our system parameters (confocal point spread function and sensitivity roll-off). We verify our model with experimental data from controlled phantoms of monodisperse silica beads (scattering coefficients between 1 and 30 mm(−1) and scattering anisotropy between 0.4 and 0.9). The optical properties of the phantoms are calculated using Mie theory combined with the Percus–Yevick structure factor to account for concentration-dependent scattering. We demonstrate excellent agreement between the OCT attenuation and backscattering coefficient predicted by our model and experimentally derived values. We conclude that this model enables us to accurately model OCT-derived parameters (i.e., attenuation and backscattering coefficients) in the concentration-dependent and multiple scattering regime for spherical monodisperse samples.
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Affiliation(s)
- Mitra Almasian
- University of Amsterdam, Academic Medical Center, Department of Biomedical Engineering and Physics, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Nienke Bosschaart
- University of Twente, MIRA Institute for Biomedical Technology and Technical Medicine, Biomedical Photonic Imaging Group, Zuidhorst ZH263, 7500 AE, Enschede, The Netherlands
| | - Ton G van Leeuwen
- University of Amsterdam, Academic Medical Center, Department of Biomedical Engineering and Physics, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Dirk J Faber
- University of Amsterdam, Academic Medical Center, Department of Biomedical Engineering and Physics, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
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48
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Wang T, Brewer M, Zhu Q. An overview of optical coherence tomography for ovarian tissue imaging and characterization. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2015; 7:1-16. [PMID: 25329515 PMCID: PMC4268384 DOI: 10.1002/wnan.1306] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 08/18/2014] [Accepted: 09/02/2014] [Indexed: 12/12/2022]
Abstract
Ovarian cancer has the lowest survival rate among all the gynecologic cancers because it is predominantly diagnosed at late stages due to the lack of reliable symptoms and efficacious screening techniques. Optical coherence tomography (OCT) is an emerging technique that provides high-resolution images of biological tissue in real time, and demonstrates great potential for imaging of ovarian tissue. In this article, we review OCT studies for visualization and diagnosis of human ovaries as well as quantitative extraction of ovarian tissue optical properties for classifying normal and malignant ovaries. OCT combined with other imaging modalities to further improve ovarian tissue diagnosis is also reviewed.
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Affiliation(s)
- Tianheng Wang
- Department of Electrical and Computer Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Molly Brewer
- Division of Gynecologic Oncology, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Quing Zhu
- Department of Electrical and Computer Engineering & Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
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49
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Liu Y, Wu G, Wei H, Guo Z, Yang H, He Y, Xie S, Zhang Y, Zhu Z. In vitro assessment of effects of hyperglycemia on the optical properties of blood during coagulation using optical coherence tomography. Lasers Med Sci 2014; 30:413-20. [PMID: 25380667 DOI: 10.1007/s10103-014-1679-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 10/16/2014] [Indexed: 10/24/2022]
Abstract
No published reports have demonstrated the capability of the optical coherence tomography technique for quantifying the optical coherence tomography signal slope, 1/e light penetration depth, and attenuation coefficient of hyperglycemic blood by an in vitro assessment. The purpose of this study was to investigate the effects of hyperglycemia on optical properties during in vitro blood coagulation by optical coherence tomography. Normal whole blood acted as the control group. After 1-h coagulation, the average optical coherence tomography signal slope decreased approximately 23.3 and 16.7%, and the 1/e light penetration depths increased approximately 21.5 and 19.2% for the control and hyperglycemic groups, respectively. It could be seen from the 1/e light penetration depth evolution curves that the blood coagulation time was about (425 ± 19) s for normal whole blood and (367 ± 15) s for the hyperglycemic blood. The coagulation time decreased 13.6% for the hyperglycemic blood compared with that for normal whole blood. There was statistically significant difference in blood coagulation time between the hyperglycemic and normal whole blood (p < 0.05). The results suggested that hyperglycemia has a procoagulant effect. Our experiment was the first reported study of monitoring hyperglycemic blood coagulation using OCT. We conclude that OCT is potential technique to quantify and follow the liquid-gel transition of hyperglycemic blood coagulation.
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Affiliation(s)
- Ying Liu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, Guangdong Province, China
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50
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Welge WA, DeMarco AT, Watson JM, Rice PS, Barton JK, Kupinski MA. Diagnostic potential of multimodal imaging of ovarian tissue using optical coherence tomography and second-harmonic generation microscopy. J Med Imaging (Bellingham) 2014; 1:025501. [PMID: 25798444 DOI: 10.1117/1.jmi.1.2.025501] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Ovarian cancer is particularly deadly because it is usually diagnosed after it has metastasized. We have previously identified features of ovarian cancer using optical coherence tomography (OCT) and second-harmonic generation (SHG) microscopy (targeting collagen). OCT provides an image of the ovarian microstructure while SHG provides a high-resolution map of collagen fiber bundle arrangement. Here we investigated the diagnostic potential of dual-modality OCT and SHG imaging. We conducted a fully crossed, multi-reader, multi-case study using seven human observers. Each observer classified 44 ex vivo mouse ovaries (16 normal and 28 abnormal) as normal or abnormal from OCT, SHG, and simultaneously viewed, co-registered OCT and SHG images and provided a confidence rating on a six-point scale. We determined the average receiver operating characteristic (ROC) curves, area under the ROC curves (AUC), and other quantitative figures of merit. The results show that OCT has diagnostic potential with an average AUC of 0.91 ± 0.06. The average AUC for SHG was less promising at 0.71 ± 0.13. The average AUC for simultaneous OCT and SHG was not significantly different from OCT alone, possibly due to the limited SHG field of view. The high performance of OCT and co-registered OCT and SHG warrants further investigation.
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Affiliation(s)
- Weston A Welge
- The University of Arizona, College of Optical Sciences, 1630 E. University Blvd. Tucson, AZ 85721, 303-875-5632
| | - Andrew T DeMarco
- The University of Arizona, Department of Speech, Language, and Hearing Sciences, 1131 E. 2nd St. Tucson, AZ 85721, 267-474-0513
| | - Jennifer M Watson
- The University of Arizona, Department of Biomedical Engineering, 1657 E. Helen St. Tucson, AZ 85721, 520-626-2917
| | - Photini S Rice
- The University of Arizona, Department of Biomedical Engineering, 1657 E. Helen St. Tucson, AZ 85721, 520-626-4463
| | - Jennifer K Barton
- The University of Arizona, College of Optical Sciences, Department of Biomedical Engineering, 1657 E. Helen St. Tucson, AZ 85721, 520-626-4116
| | - Matthew A Kupinski
- The University of Arizona, College of Optical Sciences, 1630 E. University Blvd. Tucson, AZ 85721, 520-621-2967
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