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Zhao Y, Zhu Y, Yan Y, Yang H, Liu J, Lu Y, Li Y, Huang G. In Vivo Evaluation of Corneal Biomechanics Following Cross-Linking Surgeries Using Optical Coherence Elastography in a Rabbit Model of Keratoconus. Transl Vis Sci Technol 2024; 13:15. [PMID: 38376862 PMCID: PMC10883337 DOI: 10.1167/tvst.13.2.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Accepted: 12/30/2023] [Indexed: 02/21/2024] Open
Abstract
Purpose Validation of the feasibility of novel acoustic radiation force optical coherence elastography (ARF-OCE) for the evaluation of biomechanical enhancement of the in vivo model of keratoconus by clinical cross-linking (CXL) surgery. Methods Twelve in vivo rabbit corneas were randomly divided into two groups. Both groups were treated with collagenase type II, and a keratoconus model was obtained. Then, the two groups were treated with CXL procedures with different irradiation energy of 15 J and 30 J (CXL-15 J and CXL-30 J, respectively). An ARF-OCE probe with an ultrasmall ultrasound transducer was used to detect the biomechanical properties of cornea. An antisymmetric Lamb wave model was combined with the frequency dispersion relationship to achieve depth-resolved elastography. Results Compared with the phase velocity of the Lamb wave in healthy corneas (approximately 3.96 ± 0.27 m/s), the phase velocity of the Lamb wave was lower in the keratoconus region (P < 0.05), with an average value of 3.12 ± 0.12 m/s. Moreover, the corneal stiffness increased after CXL treatment (P < 0.05), and the average phase velocity of the Lamb wave was 4.3 ± 0.19 m/s and 4.54 ± 0.13 m/s after CXL-15 J and CXL-30 J treatment. Conclusions The Young's moduli of the keratoconus regions were significantly lower than the healthy corneas. Moreover, the Young's modulus of the keratoconus regions was significantly higher after CXL-30 J treatment than after CXL-15 J treatment. We demonstrated that the ARF-OCE technique has great potential in screening keratoconus and guiding clinical CXL treatment. Translational Relevance This work accelerates the clinical translation of OCE systems using ultrasmall ultrasound transducers and is used to guide CXL procedures.
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Affiliation(s)
- Yanzhi Zhao
- Eye Center, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Yirui Zhu
- School of Physics, University of Nanjing, Nanjing, Jiangsu, China
- School of Testing and Opto-electronic Engineering, Nanchang Hangkong University, Nanchang, Jiangxi, China
| | - Yange Yan
- Yujiang District People's Hospital, Jiangxi, China
| | - Hongwei Yang
- Eye Center, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Jingchao Liu
- Department of Ophthalmology, Nanchang First Hospital, Nanchang, Jiangxi, China
| | - Yongan Lu
- Department of Ophthalmology, Nanchang First Hospital, Nanchang, Jiangxi, China
| | - Yingjie Li
- Department of Ophthalmology, Nanchang First Hospital, Nanchang, Jiangxi, China
| | - Guofu Huang
- Eye Center, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
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Crespo MA, Jimenez HJ, Deshmukh T, Pulido JS, Saad AS, Silver FH, Benedetto DA, Rapuano CJ, Syed ZA. In Vivo Determination of the Human Corneal Elastic Modulus Using Vibrational Optical Coherence Tomography. Transl Vis Sci Technol 2022; 11:11. [PMID: 35822948 PMCID: PMC9288150 DOI: 10.1167/tvst.11.7.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose To determine the in vivo elastic modulus of the human cornea using vibrational optical coherence tomography (VOCT). Methods Vibrational analysis coupled with optical coherence tomography (OCT) was used to obtain the resonant frequency (RF) and elastic modulus of corneal structural components. VOCT corneal thickness values were measured using OCT images and correlated with corneal thickness determined with Pentacam (Oculus, Wetzlar, Germany). Moduli were obtained at two locations: central cornea (CC) and inferior cornea (IC). Measurements were obtained with and without anesthetic eye drops to assess their effect on the modulus measurements. Results VOCT thickness values correlated positively (R2 = 0.97) and linearly (y = 1.039x–16.89) with those of Pentacam. Five RF peaks (1–5) were present, although their presence was variable across eyes. The RF for peaks 1 to 5 in the CC and IC ranged from 73.5 ± 4.9 to 239 ± 3 Hz and 72.1 ± 6.3 to 238 ± 4 Hz, respectively. CC and IC moduli for peaks 1 to 5 ranged from 1.023 ± 0.104 to 6.87 ± 0.33 MPa and 0.98 ± 0.15 to 6.52 ± 0.79 MPa, respectively. Topical anesthesia did not significantly alter the modulus (P > 0.05 for all), except for peak 2 in the CC (P < 0.05). Conclusions This pilot study demonstrates the utility of VOCT as an in vivo, noninvasive technology to measure the elastic modulus in human corneas. The structural origin of these moduli is hypothesized based on previous reports, and further analyses are necessary for confirmation. Translational Relevance This work presents VOCT as a novel approach to assess the in vivo elastic modulus of the cornea, an indicator of corneal structural integrity and health.
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Affiliation(s)
- Marcos A Crespo
- Cornea Service, Wills Eye Hospital, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, USA
| | - Hiram J Jimenez
- Vickie and Jack Farber Vision Research Center, Wills Eye Hospital, Philadelphia, PA, USA
| | | | - Jose S Pulido
- Vickie and Jack Farber Vision Research Center, Wills Eye Hospital, Philadelphia, PA, USA
| | - Ahmed Saeed Saad
- Cornea Service, Wills Eye Hospital, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, USA
| | - Frederick H Silver
- OptoVibronex, LLC, Bethlehem, PA, USA.,Department of Pathology and Laboratory Medicine, Robert Wood Johnson Medical School, Piscataway, NJ, USA
| | | | - Christopher J Rapuano
- Cornea Service, Wills Eye Hospital, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, USA
| | - Zeba A Syed
- Cornea Service, Wills Eye Hospital, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, USA
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Lan G, Gu B, Larin KV, Twa MD. Clinical Corneal Optical Coherence Elastography Measurement Precision: Effect of Heartbeat and Respiration. Transl Vis Sci Technol 2020; 9:3. [PMID: 32821475 PMCID: PMC7401940 DOI: 10.1167/tvst.9.5.3] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 11/30/2019] [Indexed: 01/29/2023] Open
Abstract
Purpose Normal physiological movements (e.g., respiration and heartbeat) induce eye motions during clinical measurements of human corneal biomechanical properties using optical coherence elastography (OCE). We quantified the effects of respiratory and cardiac-induced eye motions on clinical corneal OCE measurement precision and repeatability. Methods Corneal OCE was performed using low-force, micro-air-pulse tissue stimulation and high-resolution phase-sensitive optical coherence tomography (OCT) imaging. Axial surface displacements of the corneal apex were measured (M-mode) at a 70-kHz sampling rate and three different stimulation pressures (20-60 Pa). Simultaneously, the axial corneal position was tracked with structural OCT imaging, while the heartrate and respiration were monitored over a 90 second period. Results Respiratory- and cardiac-induced eye motions have distinctly lower frequency (0.1-1 Hz) and much greater amplitude (up to ± 50 µm movements) than air-pulse-induced corneal tissue deformations (∼250 Hz, <1 µm). The corneal displacements induced during OCE measurements in vivo were -0.41 ± 0.06 µm (n = 22 measurements, coefficient of variation [CV]: 14.6%) and -0.44 ± 0.07 µm (n = 50 measurements, CV: 15.9%), respectively, from two human subjects at 40 Pa stimulation pressure. Observed variation in corneal tissue displacements were not associated with tissue stimulation magnitude, or the amplitude of physiologically induced axial eye motion. Conclusions The microsecond timescale and submicron tissue displacements observed during corneal OCE measurements are separable from normal involuntary physiological movements, such as the oculocardiac pulse and respiratory movements. Translational Relevance This work advances innovations in biomedical imaging and engineering for clinical diagnostic applications for soft-tissue biomechanical testing.
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Affiliation(s)
- Gongpu Lan
- Department of Photoelectric Technology, Foshan University, Foshan, Guangdong, China.,School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Boyu Gu
- Department of Ophthalmology, Doheny Eye Institute, University of California -Los Angeles, Los Angeles, CA, USA
| | - Kirill V Larin
- Department of Biomedical Engineering, University of Houston, Houston, TX, USA
| | - Michael D Twa
- School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA.,College of Optometry, University of Houston, Houston, TX, USA
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Zhang XU, van der Zee P, Atzeni I, Faber DJ, van Leeuwen TG, Sterenborg HJCM. Multidiameter single-fiber reflectance spectroscopy of heavily pigmented skin: modeling the inhomogeneous distribution of melanin. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-11. [PMID: 31820596 PMCID: PMC7006040 DOI: 10.1117/1.jbo.24.12.127001] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 10/28/2019] [Indexed: 05/05/2023]
Abstract
When analyzing multidiameter single-fiber reflectance (MDSFR) spectra, the inhomogeneous distribution of melanin pigments in skin tissue is usually not accounted for. Especially in heavily pigmented skins, this can result in bad fits and biased estimation of tissue optical properties. A model is introduced to account for the inhomogeneous distribution of melanin pigments in skin tissue. In vivo visible MDSFR measurements were performed on heavily pigmented skin of type IV to VI. Skin tissue optical properties and related physiological properties were extracted from the measured spectra using the introduced model. The absorption of melanin pigments described by the introduced model demonstrates a good correlation with the co-localized measurement of the well-known melanin index.
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Affiliation(s)
- Xu U. Zhang
- Amsterdam UMC, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
- Amsterdam UMC, Cancer Center Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
- Address all correspondence to Xu U. Zhang, E-mail:
| | | | - Isabella Atzeni
- University of Groningen, University Medical Center Groningen, Division of Vascular Medicine, Department of Internal Medicine, Groningen, The Netherlands
| | - Dirk J. Faber
- Amsterdam UMC, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
- Amsterdam UMC, Cancer Center Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Ton G. van Leeuwen
- Amsterdam UMC, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
- Amsterdam UMC, Cancer Center Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Henricus J. C. M. Sterenborg
- Amsterdam UMC, University of Amsterdam, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
- Amsterdam UMC, Cancer Center Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
- The Netherlands Cancer Institute, Department of Surgery, Amsterdam, The Netherlands
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Kirby MA, Zhou K, Pitre JJ, Gao L, Li D, Pelivanov I, Song S, Li C, Huang Z, Shen T, Wang R, O’Donnell M. Spatial resolution in dynamic optical coherence elastography. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-16. [PMID: 31535538 PMCID: PMC6749618 DOI: 10.1117/1.jbo.24.9.096006] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 08/26/2019] [Indexed: 05/03/2023]
Abstract
Dynamic optical coherence elastography (OCE) tracks elastic wave propagation speed within tissue, enabling quantitative three-dimensional imaging of the elastic modulus. We show that propagating mechanical waves are mode converted at interfaces, creating a finite region on the order of an acoustic wavelength where there is not a simple one-to-one correspondence between wave speed and elastic modulus. Depending on the details of a boundary’s geometry and elasticity contrast, highly complex propagating fields produced near the boundary can substantially affect both the spatial resolution and contrast of the elasticity image. We demonstrate boundary effects on Rayleigh waves incident on a vertical boundary between media of different shear moduli. Lateral resolution is defined by the width of the transition zone between two media and is the limit at which a physical inclusion can be detected with full contrast. We experimentally demonstrate results using a spectral-domain OCT system on tissue-mimicking phantoms, which are replicated using numerical simulations. It is shown that the spatial resolution in dynamic OCE is determined by the temporal and spatial characteristics (i.e., bandwidth and spatial pulse width) of the propagating mechanical wave. Thus, mechanical resolution in dynamic OCE inherently differs from the optical resolution of the OCT imaging system.
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Affiliation(s)
- Mitchell A. Kirby
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Kanheng Zhou
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
- University of Dundee, School of Science and Engineering, Dundee, United Kingdom
| | - John J. Pitre
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Liang Gao
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - David Li
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
- University of Washington, Department of Chemical Engineering, Seattle, Washington, United States
| | - Ivan Pelivanov
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
- Address all correspondence to Ivan Pelivanov, E-mail:
| | - Shaozhen Song
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Chunhui Li
- University of Dundee, School of Science and Engineering, Dundee, United Kingdom
| | - Zhihong Huang
- University of Dundee, School of Science and Engineering, Dundee, United Kingdom
| | - Tueng Shen
- University of Washington, Department of Ophthalmology, Seattle, Washington, United States
| | - Ruikang Wang
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
- University of Washington, Department of Ophthalmology, Seattle, Washington, United States
| | - Matthew O’Donnell
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
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Pelivanov I, Gao L, Pitre J, Kirby MA, Song S, Li D, Shen TT, Wang RK, O’Donnell M. Does group velocity always reflect elastic modulus in shear wave elastography? JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-11. [PMID: 31342691 PMCID: PMC6650747 DOI: 10.1117/1.jbo.24.7.076003] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 07/08/2019] [Indexed: 05/04/2023]
Abstract
Dynamic elastography is an attractive method to evaluate tissue biomechanical properties. Recently, it was extended from US- and MR-based modalities to optical ones, such as optical coherence tomography for three-dimensional (3-D) imaging of propagating mechanical waves in subsurface regions of soft tissues, such as the eye. The measured group velocity is often used to convert wave speed maps into 3-D images of the elastic modulus distribution based on the assumption of bulk shear waves. However, the specific geometry of OCE measurements in bounded materials such as the cornea and skin calls into question elasticity reconstruction assuming a simple relationship between group velocity and shear modulus. We show that in layered media the bulk shear wave assumption results in highly underestimated shear modulus reconstructions and significant structural artifacts in modulus images. We urge the OCE community to be careful in using the group velocity to evaluate tissue elasticity and to focus on developing robust reconstruction methods to accurately reconstruct images of the shear elastic modulus in bounded media.
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Affiliation(s)
- Ivan Pelivanov
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
- Address all correspondence to Ivan Pelivanov, E-mail:
| | - Liang Gao
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - John Pitre
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Mitchell A. Kirby
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Shaozhen Song
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - David Li
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
- University of Washington, Department of Chemical Engineering, Seattle, Washington, United States
| | - Tueng T. Shen
- University of Washington, Department of Ophthalmology, Seattle, Washington, United States
| | - Ruikang K. Wang
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Matthew O’Donnell
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
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Chue-Sang J, Gonzalez M, Pierre A, Laughrey M, Saytashev I, Novikova T, Ramella-Roman JC. Optical phantoms for biomedical polarimetry: a review. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-12. [PMID: 30851015 PMCID: PMC6975228 DOI: 10.1117/1.jbo.24.3.030901] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 01/29/2019] [Indexed: 05/04/2023]
Abstract
Calibration, quantification, and standardization of the polarimetric instrumentation, as well as interpretation and understanding of the obtained data, require the development and use of well-calibrated phantoms and standards. We reviewed the status of tissue phantoms for a variety of applications in polarimetry; more than 500 papers are considered. We divided the phantoms into five groups according to their origin (biological/nonbiological) and fundamental polarimetric properties of retardation, depolarization, and diattenuation. We found that, while biological media are generally depolarizing, retarding, and diattenuating, only one of all the phantoms reviewed incorporated all these properties, and few considered at least combined retardation and depolarization. Samples derived from biological tissue, such as tendon and muscle, remain extremely popular to quickly ascertain a polarimetric system, but do not provide quantifiable results aside from relative direction of their principal optical axis. Microspheres suspensions are the most utilized phantoms for depolarization, and combined with theoretical models can offer true quantification of depolarization or degree of polarization. There is a real paucity of birefringent phantoms despite the retardance being one of the most interesting parameters measurable with polarization techniques. Therefore, future work should be directed at generating truly reliable and repeatable phantoms for this metric determination. Diattenuating phantoms are rare and application-specific. Given that diattenuation is considered to be low in most biological tissues, the lack of such phantoms is seen as less problematic. The heterogeneity of the phantoms reviewed points to a critical need for standardization in this field. Ultimately, all research groups involved in polarimetric studies and instruments development would benefit from sharing a limited set of standardized polarimetric phantoms, as is done earlier in the round robin investigations in ellipsometry.
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Affiliation(s)
- Joseph Chue-Sang
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Mariacarla Gonzalez
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Angie Pierre
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Megan Laughrey
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
| | - Ilyas Saytashev
- Florida International University, Herbert Wertheim College of Medicine, Miami, Florida, United States
| | - Tatiana Novikova
- LPICM Laboratoire de Physique des Interfaces et Couches Minces, CNRS, Ecole Polytechnique, Palaiseau, France
| | - Jessica C. Ramella-Roman
- Florida International University, Department of Biomedical Engineering, Miami, Florida, United States
- Florida International University, Herbert Wertheim College of Medicine, Miami, Florida, United States
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8
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Karpiouk AB, VanderLaan DJ, Larin KV, Emelianov SY. Integrated optical coherence tomography and multielement ultrasound transducer probe for shear wave elasticity imaging of moving tissues. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-7. [PMID: 30369107 PMCID: PMC6210783 DOI: 10.1117/1.jbo.23.10.105006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 09/25/2018] [Indexed: 05/18/2023]
Abstract
Accurate measurements of microelastic properties of soft tissues in-vivo using optical coherence elastography can be affected by motion artifacts caused by cardiac and respiratory cycles. This problem can be overcome using a multielement ultrasound transducer probe where each ultrasound transducer is capable of generating acoustic radiation force (ARF) and, therefore, creating shear waves in tissue. These shear waves, produced during the phase of cardiac and respiratory cycles when tissues are effectively stationary, are detected at the same observation point using phase-sensitive optical coherence tomography (psOCT). Given the known distance between the ultrasound transducers, the speed of shear wave propagation can be calculated by measuring the difference between arrival times of shear waves. The combined multitransducer ARF/psOCT probe has been designed and tested in phantoms and ex-vivo studies using fresh rabbit heart. The measured values of shear moduli are in good agreement with those reported in literature. Our results suggest that the developed multitransducer ARF/psOCT probe can be useful for many in-vivo applications, including quantifying the microelasticity of cardiac muscle.
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Affiliation(s)
- Andrei B. Karpiouk
- Georgia Institute of Technology, Electrical and Computer Engineering Department, Atlanta, Georgia, United States
| | - Donald J. VanderLaan
- Georgia Institute of Technology, Electrical and Computer Engineering Department, Atlanta, Georgia, United States
| | - Kirill V. Larin
- University of Houston, Biomedical Engineering Department, Houston, Texas, United States
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
| | - Stanislav Y. Emelianov
- Georgia Institute of Technology, Electrical and Computer Engineering Department, Atlanta, Georgia, United States
- Georgia Institute of Technology and Emory University, School of Medicine, Wallace H. Coulter Department of Biomedical Engineering, Atlanta, Georgia, United States
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Bashkatov AN, Berezin KV, Dvoretskiy KN, Chernavina ML, Genina EA, Genin VD, Kochubey VI, Lazareva EN, Pravdin AB, Shvachkina ME, Timoshina PA, Tuchina DK, Yakovlev DD, Yakovlev DA, Yanina IY, Zhernovaya OS, Tuchin VV. Measurement of tissue optical properties in the context of tissue optical clearing. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-31. [PMID: 30141286 DOI: 10.1117/1.jbo.23.9.091416] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 07/30/2018] [Indexed: 05/05/2023]
Abstract
Nowadays, dynamically developing optical (photonic) technologies play an ever-increasing role in medicine. Their adequate and effective implementation in diagnostics, surgery, and therapy needs reliable data on optical properties of human tissues, including skin. This paper presents an overview of recent results on the measurements and control of tissue optical properties. The issues reported comprise a brief review of optical properties of biological tissues and efficacy of optical clearing (OC) method in application to monitoring of diabetic complications and visualization of blood vessels and microcirculation using a number of optical imaging technologies, including spectroscopic, optical coherence tomography, and polarization- and speckle-based ones. Molecular modeling of immersion OC of skin and specific technique of OC of adipose tissue by its heating and photodynamic treatment are also discussed.
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Affiliation(s)
- Alexey N Bashkatov
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
| | - Kirill V Berezin
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
| | - Konstantin N Dvoretskiy
- Saratov State Medical University, Subdivision of Medical and Biological Physics, Saratov, Russia
| | - Maria L Chernavina
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
| | - Elina A Genina
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
| | - Vadim D Genin
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
| | - Vyacheslav I Kochubey
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
| | - Ekaterina N Lazareva
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
- Immanuel Kant Baltic Federal University, Center for Functionalized Magnetic Materials, Kaliningrad, Russia
| | - Alexander B Pravdin
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
| | - Marina E Shvachkina
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
| | - Polina A Timoshina
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
| | - Daria K Tuchina
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - Dmitry D Yakovlev
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
| | - Dmitry A Yakovlev
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
| | - Irina Yu Yanina
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
| | - Olga S Zhernovaya
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
| | - Valery V Tuchin
- Saratov State University, Research-Educational Institute of Optics and Biophotonics, Saratov, Russia
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
- Institute of Precision Mechanics and Control of the Russian Academy of Sciences, Saratov, Russia
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10
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Chen TL, Lo YL, Liao CC, Phan QH. Noninvasive measurement of glucose concentration on human fingertip by optical coherence tomography. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-9. [PMID: 29637760 DOI: 10.1117/1.jbo.23.4.047001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 03/16/2018] [Indexed: 05/03/2023]
Abstract
A method is proposed for determining the glucose concentration on the human fingertip by extracting two optical parameters, namely the optical rotation angle and the depolarization index, using a Mueller optical coherence tomography technique and a genetic algorithm. The feasibility of the proposed method is demonstrated by measuring the optical rotation angle and depolarization index of aqueous glucose solutions with low and high scattering, respectively. It is shown that for both solutions, the optical rotation angle and depolarization index vary approximately linearly with the glucose concentration. As a result, the ability of the proposed method to obtain the glucose concentration by means of just two optical parameters is confirmed. The practical applicability of the proposed technique is demonstrated by measuring the optical rotation angle and depolarization index on the human fingertip of healthy volunteers under various glucose conditions.
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Affiliation(s)
- Tseng-Lin Chen
- National Cheng Kung University, Department of Mechanical Engineering, Tainan, Taiwan
| | - Yu-Lung Lo
- National Cheng Kung University, Department of Mechanical Engineering, Tainan, Taiwan
- National Cheng Kung University, Advanced Optoelectronic Technology Center, Tainan, Taiwan
| | - Chia-Chi Liao
- National Cheng Kung University, Department of Mechanical Engineering, Tainan, Taiwan
| | - Quoc-Hung Phan
- National Cheng Kung University, Department of Mechanical Engineering, Tainan, Taiwan
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11
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Chang CH, Hardy LA, Peters MG, Bastawros DA, Myers EM, Kennelly MJ, Fried NM. Optical Clearing of Vaginal Tissues in Cadavers. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2018; 10468:104680K. [PMID: 30774176 PMCID: PMC6377076 DOI: 10.1117/12.2285079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A nonsurgical laser procedure is being developed for treatment of female stress urinary incontinence (SUI). Previous studies in porcine vaginal tissues, ex vivo, as well as computer simulations, showed the feasibility of using near-infrared laser energy delivered through a transvaginal contact cooling probe to thermally remodel endopelvic fascia, while preserving the vaginal wall from thermal damage. This study explores optical properties of vaginal tissue in cadavers as an intermediate step towards future pre-clinical and clinical studies. Optical clearing of tissue using glycerol resulted in a 15-17% increase in optical transmission after 11 min at room temperature (and a calculated 32.5% increase at body temperature). Subsurface thermal lesions were created using power of 4.6 - 6.4 W, 5.2-mm spot, and 30 s irradiation time, resulting in partial preservation of vaginal wall to 0.8 - 1.1 mm depth.
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Affiliation(s)
- Chun-Hung Chang
- Department of Physics and Optical Science, University of North Carolina at Charlotte, NC
| | - Luke A. Hardy
- Department of Physics and Optical Science, University of North Carolina at Charlotte, NC
| | - Michael G. Peters
- Women’s Center for Pelvic Health, Carolinas Medical Center, Charlotte, NC
| | - Dina A. Bastawros
- Women’s Center for Pelvic Health, Carolinas Medical Center, Charlotte, NC
| | - Erinn M. Myers
- Women’s Center for Pelvic Health, Carolinas Medical Center, Charlotte, NC
| | - Michael J. Kennelly
- Women’s Center for Pelvic Health, Carolinas Medical Center, Charlotte, NC
- McKay Department of Urology, Carolinas Medical Center, Charlotte, NC
| | - Nathaniel M. Fried
- Department of Physics and Optical Science, University of North Carolina at Charlotte, NC
- McKay Department of Urology, Carolinas Medical Center, Charlotte, NC
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12
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Matthäus C, Dochow S, Egodage KD, Romeike BF, Brehm BR, Popp J. Detection and characterization of early plaque formations by Raman probe spectroscopy and optical coherence tomography: an in vivo study on a rabbit model. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-6. [PMID: 29318812 DOI: 10.1117/1.jbo.23.1.015004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 12/15/2017] [Indexed: 05/22/2023]
Abstract
Intravascular imaging techniques provide detailed specification about plaque appearance and morphology, but cannot deliver information about the biochemical composition of atherosclerotic plaques. As the biochemical composition is related to the plaque type, important aspects such as the risk of a plaque rupture and treatment are still difficult to assess. Currently, various spectroscopic techniques are tested for potential applications for the chemical analysis of plaque depositions. Here, we employ Raman spectroscopy in combination with optical coherence tomography (OCT) for the characterization of plaques on rabbits in vivo. Experiments were carried out on New Zealand white rabbits treated with a fat- and cholesterol-enriched diet, using a Raman probe setup with a 785-nm multimode laser as an excitation source. Subsequently, OCT images were acquired with a swept source at 1305±55 nm at 22.6 mW. Raman spectra were recorded from normal regions and regions with early plaque formations. The probe positioning was monitored by x-ray angiography. The spectral information identified plaque depositions consisting of lipids, with triglycerides as the major component. Afterward, OCT images of the spectroscopically investigated areas were obtained. The spectral information correlates well with the observed intravascular morphology and is in good agreement with histology. Raman spectroscopy can provide detailed biochemical specification of atherosclerotic plaques.
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Affiliation(s)
- Christian Matthäus
- Leibniz Institute of Photonic Technology, Jena, Germany
- Friedrich-Schiller-University, Institute of Physical Chemistry and Abbe Center of Photonics, Jena, Germany
| | - Sebastian Dochow
- Leibniz Institute of Photonic Technology, Jena, Germany
- Friedrich-Schiller-University, Institute of Physical Chemistry and Abbe Center of Photonics, Jena, Germany
| | - Kokila D Egodage
- Leibniz Institute of Photonic Technology, Jena, Germany
- Friedrich-Schiller-University, Institute of Physical Chemistry and Abbe Center of Photonics, Jena, Germany
| | - Bernd F Romeike
- Friedrich Schiller University, Institute of Pathology, Neuropathology Section, Jena, Germany
| | - Bernhard R Brehm
- Herz-Neuro-Center Bodensee, Cardiology, Kreuzlingen, Switzerland
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology, Jena, Germany
- Friedrich-Schiller-University, Institute of Physical Chemistry and Abbe Center of Photonics, Jena, Germany
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13
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Carneiro I, Carvalho S, Henrique R, Oliveira L, Tuchin VV. Simple multimodal optical technique for evaluation of free/bound water and dispersion of human liver tissue. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-10. [PMID: 29210219 DOI: 10.1117/1.jbo.22.12.125002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 11/15/2017] [Indexed: 05/22/2023]
Abstract
The optical dispersion and water content of human liver were experimentally studied to estimate the optical dispersions of tissue scatterers and dry matter. Using temporal measurements of collimated transmittance [Tc(t)] of liver samples under treatment at different glycerol concentrations, free water and diffusion coefficient (Dgl) of glycerol in liver were found as 60.0% and 8.2×10-7 cm2/s, respectively. Bound water was calculated as the difference between the reported total water of 74.5% and found free water. The optical dispersion of liver was calculated from the measurements of refractive index (RI) of tissue samples made for different wavelengths between 400 and 1000 nm. Using liver and water optical dispersions at 20°C and the free and total water, the dispersions for liver scatterers and dry matter were calculated. The estimated dispersions present a decreasing behavior with wavelength. The dry matter dispersion shows higher RI values than liver scatterers, as expected. Considering 600 nm, dry matter has an RI of 1.508, whereas scatterers have an RI of 1.444. These dispersions are useful to characterize the RI matching mechanism in optical clearing treatments, provided that [Tc(t)] and thickness measurements are performed during treatment. The knowledge of Dgl is also important for living tissue cryoprotection applications.
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Affiliation(s)
- Isa Carneiro
- Portuguese Oncology Institute of Porto, Department of Pathology and Cancer Biology and Epigenetics G, Portugal
| | - Sónia Carvalho
- Portuguese Oncology Institute of Porto, Department of Pathology and Cancer Biology and Epigenetics G, Portugal
| | - Rui Henrique
- Portuguese Oncology Institute of Porto, Department of Pathology and Cancer Biology and Epigenetics G, Portugal
- Institute of Biomedical Sciences Abel Salazar-University of Porto, Department of Pathology and Molec, Portugal
| | - Luís Oliveira
- Polytechnic of Porto, School of Engineering, Department of Physics, Porto, Portugal
- Centre of Innovation in Engineering and Industrial Technology, ISEP, Porto, Portugal
| | - Valery V Tuchin
- Saratov State University (National Research University of Russia), Research-Educational Institute of, Russia
- Precision Mechanics and Control Institute of the Russian Academy of Sciences, Laboratory of Laser Di, Russia
- ITMO University, Laboratory of Femtomedicine, St. Petersburg, Russia
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14
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Kirby MA, Pelivanov I, Song S, Ambrozinski Ł, Yoon SJ, Gao L, Li D, Shen TT, Wang RK, O’Donnell M. Optical coherence elastography in ophthalmology. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-28. [PMID: 29275544 PMCID: PMC5745712 DOI: 10.1117/1.jbo.22.12.121720] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 12/14/2017] [Indexed: 05/03/2023]
Abstract
Optical coherence elastography (OCE) can provide clinically valuable information based on local measurements of tissue stiffness. Improved light sources and scanning methods in optical coherence tomography (OCT) have led to rapid growth in systems for high-resolution, quantitative elastography using imaged displacements and strains within soft tissue to infer local mechanical properties. We describe in some detail the physical processes underlying tissue mechanical response based on static and dynamic displacement methods. Namely, the assumptions commonly used to interpret displacement and strain measurements in terms of tissue elasticity for static OCE and propagating wave modes in dynamic OCE are discussed with the ultimate focus on OCT system design for ophthalmic applications. Practical OCT motion-tracking methods used to map tissue elasticity are also presented to fully describe technical developments in OCE, particularly noting those focused on the anterior segment of the eye. Clinical issues and future directions are discussed in the hope that OCE techniques will rapidly move forward to translational studies and clinical applications.
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Affiliation(s)
- Mitchell A. Kirby
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Ivan Pelivanov
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Shaozhen Song
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Łukasz Ambrozinski
- Akademia Górniczo-Hutnicza University of Science and Technology, Krakow, Poland
| | - Soon Joon Yoon
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - Liang Gao
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
| | - David Li
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
- University of Washington, Department of Chemical Engineering, Seattle, Washington, United States
| | - Tueng T. Shen
- University of Washington, Department of Ophthalmology, Seattle, Washington, United States
| | - Ruikang K. Wang
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
- University of Washington, Department of Ophthalmology, Seattle, Washington, United States
| | - Matthew O’Donnell
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
- Address all correspondence to: Matthew O’Donnell, E-mail:
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15
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Singh M, Li J, Vantipalli S, Han Z, Larin KV, Twa MD. Optical coherence elastography for evaluating customized riboflavin/UV-A corneal collagen crosslinking. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:91504. [PMID: 28055060 PMCID: PMC5995143 DOI: 10.1117/1.jbo.22.9.091504] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 11/15/2016] [Indexed: 05/02/2023]
Abstract
UV-induced collagen cross-linking is a promising treatment for keratoconus that stiffens corneal tissue and prevents further degeneration. Since keratoconus is generally localized, the efficacy of collagen cross-linking (CXL) treatments could be improved by stiffening only the weakened parts of the cornea. Here, we demonstrate that optical coherence elastography (OCE) can spatially resolve transverse variations in corneal stiffness. A short duration ( ? 1 ?? ms ) focused air-pulse induced low amplitude ( ? 10 ?? ? m ) deformations in the samples that were detected using a phase-stabilized optical coherence tomography system. A two-dimensional map of material stiffness was generated by measuring the damped natural frequency (DNF) of the air-pulse induced response at various transverse locations of a heterogeneous phantom mimicking a customized CXL treatment. After validation on the phantoms, similar OCE measurements were made on spatially selective CXL-treated in situ rabbit corneas. The results showed that this technique was able to clearly distinguish the untreated and CXL-treated regions of the cornea, where CXL increased the DNF of the cornea by ? 51 % . Due to the noncontact nature and minimal excitation force, this technique may be valuable for in vivo assessments of corneal biomechanical properties.
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Affiliation(s)
- Manmohan Singh
- University of Houston, Biomedical Engineering, 3517 Cullen Boulevard, Room 2027, Houston, Texas 77204, United States
| | - Jiasong Li
- University of Houston, Biomedical Engineering, 3517 Cullen Boulevard, Room 2027, Houston, Texas 77204, United States
| | - Srilatha Vantipalli
- University of Houston, Department of Optometry, 4901 Calhoun Road, Houston, Texas 77204, United States
| | - Zhaolong Han
- University of Houston, Biomedical Engineering, 3517 Cullen Boulevard, Room 2027, Houston, Texas 77204, United States
| | - Kirill V. Larin
- University of Houston, Biomedical Engineering, 3517 Cullen Boulevard, Room 2027, Houston, Texas 77204, United States
- Baylor College of Medicine, Molecular Physiology and Biophysics, One Baylor Plaza, Houston, Texas 77030, United States
- Samara State Aerospace University, Electrical and Computer Engineering, 34, Moskovskoye shosse, Samara 443086, Russia
| | - Michael D. Twa
- University of Alabama at Birmingham, School of Optometry, 1716 University Boulevard, Birmingham, Alabama 35233, United States
- Address all correspondence to: Michael D. Twa,
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16
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Singh M, Han Z, Nair A, Schill A, Twa MD, Larin KV. Applanation optical coherence elastography: noncontact measurement of intraocular pressure, corneal biomechanical properties, and corneal geometry with a single instrument. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:20502. [PMID: 28241272 PMCID: PMC5316890 DOI: 10.1117/1.jbo.22.2.020502] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 01/30/2017] [Indexed: 05/18/2023]
Abstract
Current clinical tools provide critical information about ocular health such as intraocular pressure (IOP). However, they lack the ability to quantify tissue material properties, which are potent markers for ocular tissue health and integrity. We describe a single instrument to measure the eye-globe IOP, quantify corneal biomechanical properties, and measure corneal geometry with a technique termed applanation optical coherence elastography (Appl-OCE). An ultrafast OCT system enabled visualization of corneal dynamics during noncontact applanation tonometry and direct measurement of micro air-pulse induced elastic wave propagation. Our preliminary results show that the proposed Appl-OCE system can be used to quantify IOP, corneal biomechanical properties, and corneal geometry, which builds a solid foundation for a unique device that can provide a more complete picture of ocular health.
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Affiliation(s)
- Manmohan Singh
- University of Houston, Department of Biomedical Engineering, Houston, Texas, United States
| | - Zhaolong Han
- University of Houston, Department of Biomedical Engineering, Houston, Texas, United States
| | - Achuth Nair
- University of Houston, Department of Biomedical Engineering, Houston, Texas, United States
| | - Alexander Schill
- University of Houston, Department of Biomedical Engineering, Houston, Texas, United States
| | - Michael D. Twa
- University of Alabama at Birmingham, School of Optometry, Birmingham, Alabama, United States
| | - Kirill V. Larin
- University of Houston, Department of Biomedical Engineering, Houston, Texas, United States
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, Tomsk, Russia
- Baylor College of Medicine, Molecular Physiology and Biophysics, Houston, Texas, United States
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17
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Chang CH, Myers EM, Kennelly MJ, Fried NM. Optical clearing of vaginal tissues, ex vivo, for minimally invasive laser treatment of female stress urinary incontinence. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:18002. [PMID: 28301637 PMCID: PMC5228554 DOI: 10.1117/1.jbo.22.1.018002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 12/22/2016] [Indexed: 05/12/2023]
Abstract
Near-infrared laser energy in conjunction with applied tissue cooling is being investigated for thermal remodeling of the endopelvic fascia during minimally invasive treatment of female stress urinary incontinence. Previous computer simulations of light transport, heat transfer, and tissue thermal damage have shown that a transvaginal approach is more feasible than a transurethral approach. However, results were suboptimal, and some undesirable thermal insult to the vaginal wall was still predicted. This study uses experiments and computer simulations to explore whether application of an optical clearing agent (OCA) can further improve optical penetration depth and completely preserve the vaginal wall during subsurface treatment of the endopelvic fascia. Several different mixtures of OCA’s were tested, and 100% glycerol was found to be the optimal agent. Optical transmission studies, optical coherence tomography, reflection spectroscopy, and computer simulations [including Monte Carlo (MC) light transport, heat transfer, and Arrhenius integral model of thermal damage] using glycerol were performed. The OCA produced a 61% increase in optical transmission through porcine vaginal wall at 37°C after 30 min. The MC model showed improved energy deposition in endopelvic fascia using glycerol. Without OCA, 62%, 37%, and 1% of energy was deposited in vaginal wall, endopelvic fascia, and urethral wall, respectively, compared with 50%, 49%, and 1% using OCA. Use of OCA also resulted in 0.5-mm increase in treatment depth, allowing potential thermal tissue remodeling at a depth of 3 mm with complete preservation of the vaginal wall.
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Affiliation(s)
- Chun-Hung Chang
- University of North Carolina at Charlotte, Department of Physics and Optical Science, 9201 University City Boulevard, Charlotte, North Carolina 28223, United States
| | - Erinn M. Myers
- Carolinas Medical Center, Women's Center for Pelvic Health, 2001 Vail Avenue, Suite 360, Charlotte, North Carolina 28207, United States
| | - Michael J. Kennelly
- Carolinas Medical Center, Women's Center for Pelvic Health, 2001 Vail Avenue, Suite 360, Charlotte, North Carolina 28207, United States
| | - Nathaniel M. Fried
- University of North Carolina at Charlotte, Department of Physics and Optical Science, 9201 University City Boulevard, Charlotte, North Carolina 28223, United States
- Carolinas Medical Center, Women's Center for Pelvic Health, 2001 Vail Avenue, Suite 360, Charlotte, North Carolina 28207, United States
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18
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Zabihian B, Chen Z, Rank E, Sinz C, Bonesi M, Sattmann H, Ensher J, Minneman MP, Hoover E, Weingast J, Ginner L, Leitgeb R, Kittler H, Zhang E, Beard P, Drexler W, Liu M. Comprehensive vascular imaging using optical coherence tomography-based angiography and photoacoustic tomography. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:96011. [PMID: 27653999 DOI: 10.1117/1.jbo.21.9.096011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 08/29/2016] [Indexed: 05/25/2023]
Abstract
Studies have proven the relationship between cutaneous vasculature abnormalities and dermatological disorders, but to image vasculature noninvasively <italic<in vivo</italic<, advanced optical imaging techniques are required. In this study, we imaged a palm of a healthy volunteer and three subjects with cutaneous abnormalities with photoacoustic tomography (PAT) and optical coherence tomography with angiography extension (OCTA). Capillaries in the papillary dermis that are too small to be discerned with PAT are visualized with OCTA. From our results, we speculate that the PA signal from the palm is mostly from hemoglobin in capillaries rather than melanin, knowing that melanin concentration in volar skin is significantly smaller than that in other areas of the skin. We present for the first time OCTA images of capillaries along with the PAT images of the deeper vessels, demonstrating the complementary effective imaging depth range and the visualization capabilities of PAT and OCTA for imaging human skin <italic<in vivo</italic<. The proposed imaging system in this study could significantly improve treatment monitoring of dermatological diseases associated with cutaneous vasculature abnormalities.
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Affiliation(s)
- Behrooz Zabihian
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Zhe Chen
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Elisabet Rank
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Christoph Sinz
- Medical University of Vienna, Department of Dermatology, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Marco Bonesi
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Harald Sattmann
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Jason Ensher
- Insight Photonic Solutions, Inc., 300 South Public Road, Lafayette, Colorado 80026, United States
| | - Michael P Minneman
- Insight Photonic Solutions, Inc., 300 South Public Road, Lafayette, Colorado 80026, United States
| | - Erich Hoover
- Insight Photonic Solutions, Inc., 300 South Public Road, Lafayette, Colorado 80026, United States
| | - Jessika Weingast
- Medical University of Vienna, Department of Dermatology, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Laurin Ginner
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Rainer Leitgeb
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Harald Kittler
- Medical University of Vienna, Department of Dermatology, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Edward Zhang
- University College London, Department of Medical Physics and Biomedical Engineering, Gower Street, London, United Kingdom
| | - Paul Beard
- University College London, Department of Medical Physics and Biomedical Engineering, Gower Street, London, United Kingdom
| | - Wolfgang Drexler
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Mengyang Liu
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
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19
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Han Z, Singh M, Aglyamov SR, Liu CH, Nair A, Raghunathan R, Wu C, Li J, Larin KV. Quantifying tissue viscoelasticity using optical coherence elastography and the Rayleigh wave model. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:90504. [PMID: 27653931 PMCID: PMC5028422 DOI: 10.1117/1.jbo.21.9.090504] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 08/30/2016] [Indexed: 05/02/2023]
Abstract
This study demonstrates the feasibility of using the Rayleigh wave model (RWM) in combination with optical coherence elastography (OCE) technique to assess the viscoelasticity of soft tissues. Dispersion curves calculated from the spectral decomposition of OCE-measured air-pulse induced elastic waves were used to quantify the viscoelasticity of samples using the RWM. Validation studies were first conducted on 10% gelatin phantoms with different concentrations of oil. The results showed that the oil increased the viscosity of the gelatin phantom samples. This method was then used to quantify the viscoelasticity of chicken liver. The Young’s modulus of the chicken liver tissues was estimated as E=2.04±0.88??kPa with a shear viscosity ?=1.20±0.13??Pa?s. The analytical solution of the RWM correlated very well with the OCE-measured phased velocities (R2=0.96±0.04). The results show that the combination of the RWM and OCE is a promising method for noninvasively quantifying the biomechanical properties of soft tissues and may be a useful tool for detecting disease.
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Affiliation(s)
- Zhaolong Han
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Manmohan Singh
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Salavat R. Aglyamov
- University of Texas at Austin, Department of Biomedical Engineering, 107 West Dean Keeton Street, Stop C0800, Austin, Texas 78712, United States
| | - Chih-Hao Liu
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Achuth Nair
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Raksha Raghunathan
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Chen Wu
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Jiasong Li
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Kirill V. Larin
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
- Tomsk State University, Interdisciplinary Laboratory of Biophotonics, 36 Lenin Avenue, Tomsk 634050, Russia
- Baylor College of Medicine, Molecular Physiology and Biophysics, One Baylor Plaza, Houston, Texas 77030, United States
- Address correspondence to: Kirill V. Larin, E-mail:
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20
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Doronin A, Tchvialeva L, Markhvida I, Lee TK, Meglinski I. Backscattering of linearly polarized light from turbid tissue-like scattering medium with rough surface. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:71117. [PMID: 27401802 DOI: 10.1117/1.jbo.21.7.071117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 06/14/2016] [Indexed: 06/06/2023]
Abstract
In the framework of further development of a unified computational tool for the needs of biomedical optics, we introduce an electric field Monte Carlo (MC) model for simulation of backscattering of coherent linearly polarized light from a turbid tissue-like scattering medium with a rough surface. We consider the laser speckle patterns formation and the role of surface roughness in the depolarization of linearly polarized light backscattered from the medium. The mutual phase shifts due to the photons’ pathlength difference within the medium and due to reflection/refraction on the rough surface of the medium are taken into account. The validation of the model includes the creation of the phantoms of various roughness and optical properties, measurements of co- and cross-polarized components of the backscattered/reflected light, its analysis and extensive computer modeling accelerated by parallel computing on the NVIDIA graphics processing units using compute unified device architecture (CUDA). The analysis of the spatial intensity distribution is based on second-order statistics that shows a strong correlation with the surface roughness, both with the results of modeling and experiment. The results of modeling show a good agreement with the results of experimental measurements on phantoms mimicking human skin. The developed MC approach can be used for the direct simulation of light scattered by the turbid scattering medium with various roughness of the surface.
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Affiliation(s)
- Alexander Doronin
- Yale University, Department of Computer Science, Computer Graphics Group, New Haven 06511, United States
| | - Lioudmila Tchvialeva
- University of British Columbia and Vancouver Coastal Health Research Institute, Department of Dermatology and Skin Science, Photomedicine Institute, Vancouver V5Z 4E8, Canada
| | - Igor Markhvida
- University of British Columbia and Vancouver Coastal Health Research Institute, Department of Dermatology and Skin Science, Photomedicine Institute, Vancouver V5Z 4E8, Canada
| | - Tim K Lee
- University of British Columbia and Vancouver Coastal Health Research Institute, Department of Dermatology and Skin Science, Photomedicine Institute, Vancouver V5Z 4E8, CanadacBC Cancer Agency, Departments of Cancer Control Research and Integrative Oncolog
| | - Igor Meglinski
- University of Oulu, Opto-Electronics and Measurement Techniques Laboratory, Oulu FI-9014, Finland
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21
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Wang Y, He H, Chang J, He C, Liu S, Li M, Zeng N, Wu J, Ma H. Mueller matrix microscope: a quantitative tool to facilitate detections and fibrosis scorings of liver cirrhosis and cancer tissues. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:71112. [PMID: 27087003 DOI: 10.1117/1.jbo.21.7.071112] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 03/29/2016] [Indexed: 05/02/2023]
Abstract
Today the increasing cancer incidence rate is becoming one of the biggest threats to human health.Among all types of cancers, liver cancer ranks in the top five in both frequency and mortality rate all over the world. During the development of liver cancer, fibrosis often evolves as part of a healing process in response to liver damage, resulting in cirrhosis of liver tissues. In a previous study, we applied the Mueller matrix microscope to pathological liver tissue samples and found that both the Mueller matrix polar decomposition (MMPD) and Mueller matrix transformation (MMT) parameters are closely related to the fibrous microstructures. In this paper,we take this one step further to quantitatively facilitate the fibrosis detections and scorings of pathological liver tissue samples in different stages from cirrhosis to cancer using the Mueller matrix microscope. The experimental results of MMPD and MMT parameters for the fibrotic liver tissue samples in different stages are measured and analyzed. We also conduct Monte Carlo simulations based on the sphere birefringence model to examine in detail the influence of structural changes in different fibrosis stages on the imaging parameters. Both the experimental and simulated results indicate that the polarized light microscope and transformed Mueller matrix parameter scan provide additional quantitative information helpful for fibrosis detections and scorings of liver cirrhosis and cancers. Therefore, the polarized light microscope and transformed Mueller matrix parameters have a good application prospect in liver cancer diagnosis.
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Affiliation(s)
- Ye Wang
- Tsinghua University, Graduate School at Shenzhen, Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu
| | - Honghui He
- Tsinghua University, Graduate School at Shenzhen, Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, China
| | - Jintao Chang
- Tsinghua University, Graduate School at Shenzhen, Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu
| | - Chao He
- Tsinghua University, Graduate School at Shenzhen, Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, ChinacTsinghua University, Department of Biomedical Enginee
| | - Shaoxiong Liu
- Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen Sixth People's Hospital (Nanshan Hospital), 89 Taoyuan Street, Shenzhen 518052, China
| | - Migao Li
- Guangzhou Liss Optical Instrument Factory, 81 Taojinbei Street, Guangzhou 510095, China
| | - Nan Zeng
- Tsinghua University, Graduate School at Shenzhen, Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, China
| | - Jian Wu
- Tsinghua University, Graduate School at Shenzhen, Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, China
| | - Hui Ma
- Tsinghua University, Graduate School at Shenzhen, Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu
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22
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Tuchin VV. Polarized light interaction with tissues. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:71114. [PMID: 27121763 DOI: 10.1117/1.jbo.21.7.071114] [Citation(s) in RCA: 132] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 03/22/2016] [Indexed: 05/02/2023]
Abstract
This tutorial-review introduces the fundamentals of polarized light interaction with biological tissues and presents some of the recent key polarization optical methods that have made possible the quantitative studies essential for biomedical diagnostics. Tissue structures and the corresponding models showing linear and circular birefringence, dichroism, and chirality are analyzed. As the basis for a quantitative description of the interaction of polarized light with tissues, the theory of polarization transfer in a random medium is used. This theory employs the modified transfer equation for Stokes parameters to predict the polarization properties of single- and multiple-scattered optical fields. The near-order of scatterers in tissues is accounted for to provide an adequate description of tissue polarization properties. Biomedical diagnostic techniques based on polarized light detection, including polarization imaging and spectroscopy, amplitude and intensity light scattering matrix measurements, and polarization-sensitive optical coherence tomography are described. Examples of biomedical applications of these techniques for early diagnostics of cataracts, detection of precancer, and prediction of skin disease are presented. The substantial reduction of light scattering multiplicity at tissue optical clearing that leads to a lesser influence of scattering on the measured intrinsic polarization properties of the tissue and allows for more precise quantification of these properties is demonstrated.
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Affiliation(s)
- Valery V Tuchin
- Saratov National Research State University, Research-Educational Institute of Optics and Biophotonics, 83 Astrakhanskaya street, Saratov 410012, RussiabInstitute of Precision Mechanics and Control of Russian Academy of Sciences, 24 Rabochaya street, Sarat
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23
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Zhou Y, Yao J, Wang LV. Tutorial on photoacoustic tomography. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:61007. [PMID: 27086868 PMCID: PMC4834026 DOI: 10.1117/1.jbo.21.6.061007] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 03/22/2016] [Indexed: 05/18/2023]
Abstract
Photoacoustic tomography (PAT) has become one of the fastest growing fields in biomedical optics. Unlike pure optical imaging, such as confocal microscopy and two-photon microscopy, PAT employs acoustic detection to image optical absorption contrast with high-resolution deep into scattering tissue. So far, PAT has been widely used for multiscale anatomical, functional, and molecular imaging of biological tissues. We focus on PAT’s basic principles, major implementations, imaging contrasts, and recent applications.
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Affiliation(s)
- Yong Zhou
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
| | - Junjie Yao
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
| | - Lihong V. Wang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
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24
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Chang J, He H, Wang Y, Huang Y, Li X, He C, Liao R, Zeng N, Liu S, Ma H. Division of focal plane polarimeter-based 3 × 4 Mueller matrix microscope: a potential tool for quick diagnosis of human carcinoma tissues. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:56002. [PMID: 27156716 DOI: 10.1117/1.jbo.21.5.056002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 04/11/2016] [Indexed: 05/18/2023]
Abstract
A polarization microscope is a useful tool to reveal the optical anisotropic nature of a specimen and can provide abundant microstructural information about samples. We present a division of focal plane (DoFP) polarimeter-based polarization microscope capable of simultaneously measuring both the Stokes vector and the 3×4 Mueller matrix with an optimal polarization illumination scheme. The Mueller matrix images of unstained human carcinoma tissue slices show that the m24 and m34 elements can provide important information for pathological observations. The characteristic features of the m24 and m34 elements can be enhanced by polarization staining under illumination by a circularly polarized light. Hence, combined with a graphics processing unit acceleration algorithm, the DoFP polarization microscope is capable of real-time polarization imaging for potential quick clinical diagnoses of both standard and frozen slices of human carcinoma tissues.
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Affiliation(s)
- Jintao Chang
- Tsinghua University, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu
| | - Honghui He
- Tsinghua University, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, 2279 Lishui Street, Shenzhen 518055, China
| | - Ye Wang
- Tsinghua University, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu
| | - Yi Huang
- Tsinghua University, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, 2279 Lishui Street, Shenzhen 518055, ChinacTsinghua University, Department of Biomedical Enginee
| | - Xianpeng Li
- Tsinghua University, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu
| | - Chao He
- Tsinghua University, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, 2279 Lishui Street, Shenzhen 518055, ChinacTsinghua University, Department of Biomedical Enginee
| | - Ran Liao
- Tsinghua University, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, 2279 Lishui Street, Shenzhen 518055, China
| | - Nan Zeng
- Tsinghua University, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, 2279 Lishui Street, Shenzhen 518055, China
| | - Shaoxiong Liu
- Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen Sixth People's Hospital (Nanshan Hospital), 89 Taoyuan Street, Shenzhen 518052, China
| | - Hui Ma
- Tsinghua University, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu
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25
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Raghunathan R, Singh M, Dickinson ME, Larin KV. Optical coherence tomography for embryonic imaging: a review. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:50902. [PMID: 27228503 PMCID: PMC4881290 DOI: 10.1117/1.jbo.21.5.050902] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 04/25/2016] [Indexed: 05/18/2023]
Abstract
Embryogenesis is a highly complex and dynamic process, and its visualization is crucial for understanding basic physiological processes during development and for identifying and assessing possible defects, malformations, and diseases. While traditional imaging modalities, such as ultrasound biomicroscopy, micro-magnetic resonance imaging, and micro-computed tomography, have long been adapted for embryonic imaging, these techniques generally have limitations in their speed, spatial resolution, and contrast to capture processes such as cardiodynamics during embryogenesis. Optical coherence tomography (OCT) is a noninvasive imaging modality with micrometer-scale spatial resolution and imaging depth up to a few millimeters in tissue. OCT has bridged the gap between ultrahigh resolution imaging techniques with limited imaging depth like confocal microscopy and modalities, such as ultrasound sonography, which have deeper penetration but poorer spatial resolution. Moreover, the noninvasive nature of OCT has enabled live imaging of embryos without any external contrast agents. We review how OCT has been utilized to study developing embryos and also discuss advances in techniques used in conjunction with OCT to understand embryonic development.
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Affiliation(s)
- Raksha Raghunathan
- University of Houston, Department of Biomedical Engineering, 3517 Cullen Boulevard, Room 2027, Houston, Texas 77204-5060, United States
| | - Manmohan Singh
- University of Houston, Department of Biomedical Engineering, 3517 Cullen Boulevard, Room 2027, Houston, Texas 77204-5060, United States
| | - Mary E. Dickinson
- Baylor College of Medicine, Department of Molecular Physiology and Biophysics, One Baylor Plaza- BCM335, Houston, Texas 77030, United States
| | - Kirill V. Larin
- University of Houston, Department of Biomedical Engineering, 3517 Cullen Boulevard, Room 2027, Houston, Texas 77204-5060, United States
- Baylor College of Medicine, Department of Molecular Physiology and Biophysics, One Baylor Plaza- BCM335, Houston, Texas 77030, United States
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26
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Hsu HC, Wang L, Wang LV. In vivo photoacoustic microscopy of human cuticle microvasculature with single-cell resolution. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:56004. [PMID: 27207113 PMCID: PMC5998605 DOI: 10.1117/1.jbo.21.5.056004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 04/19/2016] [Indexed: 05/24/2023]
Abstract
As a window on the microcirculation, human cuticle capillaries provide rich information about the microvasculature, such as its morphology, density, dimensions, or even blood flow speed. Many imaging technologies have been employed to image human cuticle microvasculature. However, almost none of these techniques can noninvasively observe the process of oxygen release from single red blood cells (RBCs), an observation which can be used to study healthy tissue functionalities or to diagnose, stage, or monitor diseases. For the first time, we adapted single-cell resolution photoacoustic (PA) microscopy (PA flowoxigraphy) to image cuticle capillaries and quantified multiple functional parameters. Our results show more oxygen release in the curved cuticle tip region than in other regions of a cuticle capillary loop, associated with a low of RBC flow speed in the tip region. Further analysis suggests that in addition to the RBC flow speed, other factors, such as the drop of the partial oxygen pressure in the tip region, drive RBCs to release more oxygen in the tip region.
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Affiliation(s)
- Hsun-Chia Hsu
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
| | | | - Lihong V. Wang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
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27
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Du Y, Liu CH, Lei L, Singh M, Li J, Hicks MJ, Larin KV, Mohan C. Rapid, noninvasive quantitation of skin disease in systemic sclerosis using optical coherence elastography. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:46002. [PMID: 27048877 PMCID: PMC4837197 DOI: 10.1117/1.jbo.21.4.046002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 03/07/2016] [Indexed: 05/18/2023]
Abstract
Systemic sclerosis (SSc) is a connective tissue disease that results in excessive accumulation of collagen in the skin and internal organs. Overall, SSc has a rare morbidity (276 cases per million adults in the United States), but has a 10-year survival rate of 55%. Currently, the modified Rodnan skin score (mRSS) is assessed by palpation on 17 sites on the body. However, the mRSS assessed score is subjective and may be influenced by the experience of the rheumatologists. In addition, the inherent elasticity of skin may bias the mRSS assessment in the early stage of SSc, such as oedematous. Optical coherence elastography (OCE) is a rapidly emerging technique, which can assess mechanical contrast in tissues with micrometer spatial resolution. In this work, the OCE technique is applied to assess the mechanical properties of skin in both control and bleomycin (BLM) induced SSc-like disease noninvasively. Young’s modulus of the BLM-SSc skin was found be significantly higher than that of normal skin, in both the in vivo and in vitro studies (p<0.05 p<0.05 ). Thus, OCE is able to differentiate healthy and fibrotic skin using mechanical contrast. It is a promising new technology for quantifying skin involvement in SSc in a rapid, unbiased, and noninvasive manner.
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Affiliation(s)
- Yong Du
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Chih-Hao Liu
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Ling Lei
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Manmohan Singh
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - Jiasong Li
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
| | - M. John Hicks
- Texas Children’s Hospital, Pathology & Immunology and Pediatrics, Baylor College of Medicine, 6621 Fannin Street, Houston, Texas 77030, United States
| | - Kirill V. Larin
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
- Baylor College of Medicine, Molecular Physiology and Biophysics, One Baylor Plaza, Houston, Texas 77030, United States
- Samara State Aerospace University, Department of Laser and Biotechnical Systems, 34 Moskovskoye shosse, Samara 443086, Russia
- Address all correspondence to: Kirill V. Larin, E-mail: ; Chandra Mohan, E-mail:
| | - Chandra Mohan
- University of Houston, Department of Biomedical Engineering, 3605 Cullen Boulevard, Houston, Texas 77204, United States
- Address all correspondence to: Kirill V. Larin, E-mail: ; Chandra Mohan, E-mail:
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28
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Aglyamov SR, Wang S, Emelianov SY, Larin KV. A three-dimensional solution for laser-induced thermoelastic deformation of the layered medium. ACTA ACUST UNITED AC 2016. [DOI: 10.1117/12.2213480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
| | - Shang Wang
- Baylor College of Medicine (United States)
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29
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Wang Y, Guo Y, Zeng N, Chen D, He H, Ma H. Study on the validity of 3 × 3 Mueller matrix decomposition. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:065003. [PMID: 26039383 DOI: 10.1117/1.jbo.20.6.065003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Accepted: 05/07/2015] [Indexed: 05/02/2023]
Abstract
Using Monte Carlo simulations based on previously developed scattering models consisting of spherical and cylindrical scatterers imbedded in birefringent interstitial medium, we compare the polarization parameters extracted from the 3×3 and 4×4 Mueller matrix decomposition methods in forward and backward scattering directions. The results show that the parameters derived from the 3×3 Mueller matrix decomposition are usually not the same as those from the 4×4 Mueller matrix decomposition but display similar qualitative relations to changes in the microstructure of the sample, such as the density, size, and orientation distributions of the scatterers, and birefringence of the interstitial medium. The simulations are backed up by experiments when suitable samples are available.
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Affiliation(s)
- Yunfei Wang
- Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Shenzhen 518055, China
| | - Yihong Guo
- Peking University, Institute of Software, School of Electronic and Computer Science, Key Laboratory of High Confidence Software Technologies, Beijing 100084, China
| | - Nan Zeng
- Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Shenzhen 518055, China
| | - Dongsheng Chen
- Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Shenzhen 518055, China
| | - Honghui He
- Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Shenzhen 518055, China
| | - Hui Ma
- Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Shenzhen 518055, China
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