1
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Tavera Ruiz CG, De La Torre-Ibarra MH, Flores-Moreno JM, Frausto-Reyes C, Santoyo FM. Cortical bone quality affectations and their strength impact analysis using holographic interferometry. Biomed Opt Express 2018; 9:4818-4833. [PMID: 30319905 PMCID: PMC6179407 DOI: 10.1364/boe.9.004818] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/08/2018] [Accepted: 08/09/2018] [Indexed: 06/08/2023]
Abstract
It is now accepted that bone strength is a complex property determined mainly by three factors: quantity, quality and turnover of the bone itself. Most of the patients who experience fractures due to fragility could never develop affectations related to bone mass density (i.e. osteoporosis). In this work, the effect of secondary bone strength affectations are analyzed by simulating the degradation of one or more principal components (organic and inorganic) while they are inspected with a nondestructive optical technique. From the results obtained, a strong correlation among the hydroxyapatite, collagen and water is found that determines the bone strength.
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Affiliation(s)
- Cesar G. Tavera Ruiz
- Centro de Investigaciones en Óptica, Loma Del Bosque 115, León Guanajuato C.P. 37150, México
| | - Manuel H. De La Torre-Ibarra
- Centro de Investigaciones en Óptica - Unidad Aguascalientes, Prol. Constitución 607, Fracc. Reserva Loma Bonita, Aguascalientes, Ags, C.P. 20200, México
| | - J. M. Flores-Moreno
- Centro de Investigaciones en Óptica, Loma Del Bosque 115, León Guanajuato C.P. 37150, México
| | - Claudio Frausto-Reyes
- Centro de Investigaciones en Óptica - Unidad Aguascalientes, Prol. Constitución 607, Fracc. Reserva Loma Bonita, Aguascalientes, Ags, C.P. 20200, México
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2
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Das S, Liu CH, Singh M, Twa MD, Larin KV. Modified wavelength scanning interferometry for simultaneous tomography and topography of the cornea with Fourier domain optical coherence tomography. Biomed Opt Express 2018; 9:4443-4458. [PMID: 30615727 PMCID: PMC6157774 DOI: 10.1364/boe.9.004443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/15/2018] [Accepted: 08/16/2018] [Indexed: 05/20/2023]
Abstract
Visual acuity is dependent on corneal shape and size. A minor variation in surface geometry can cause a deformation of corneal geometry, which affects its optical performance. In this work we demonstrate an algorithm for the simultaneous measurement of corneal tomography and topography with a traditional point-scanning Fourier domain optical coherence tomography (FD-OCT) system. A modified wavelength scanning interferometry (mWSI) algorithm enabled topographical evaluation of the surface with nanometer-scale resolution, which is superior to the micrometer-scale resolution of traditional OCT structural imaging. We validated the technique with an optically flat mirror, standard roughness gauges, and atomic force microscopy (AFM). The mirror results show nanometer-scale sensitivity (~3.5 nm), and the mWSI measurements were in good agreement (error ~5%) with the specifications of the roughness comparator and AFM, demonstrating the accuracy of the technique. Following validation, the measurements were made on pig corneas in situ at various artificially controlled intraocular pressures (IOP) and before and after cross-linking (CXL). The results show that the mean surface roughness increased by ~65% after removal of the epithelium in preparation for CXL but did not change as a function of IOP. The demonstrated method could be used for simultaneous measurement of tissue tomography with micrometer-precision and topography with nanometer-precision.
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Affiliation(s)
- Susobhan Das
- Department of Biomedical Engineering, University of Houston, Houston, TX 77004, USA
| | - Chih-Hao Liu
- Department of Biomedical Engineering, University of Houston, Houston, TX 77004, USA
| | - Manmohan Singh
- Department of Biomedical Engineering, University of Houston, Houston, TX 77004, USA
| | - Michael D. Twa
- College of Optometry, University of Alabama, Birmingham, AL 35294, USA
- Department of Biomedical Engineering, University of Alabama, Birmingham, AL 35294, USA
| | - Kirill V. Larin
- Department of Biomedical Engineering, University of Houston, Houston, TX 77004, USA
- Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77030, USA
- Interdisciplinary Laboratory of Biophotonics, Tomsk State University, Tomsk, Russia
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3
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Ledwig P, Sghayyer M, Kurtzberg J, Robles FE. Dual-wavelength oblique back-illumination microscopy for the non-invasive imaging and quantification of blood in collection and storage bags. Biomed Opt Express 2018; 9:2743-2754. [PMID: 30258687 PMCID: PMC6154191 DOI: 10.1364/boe.9.002743] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/11/2018] [Accepted: 05/12/2018] [Indexed: 05/10/2023]
Abstract
There is currently no low-cost method to quantitatively assess the contents of a blood bag without breaching the bag and potentially damaging the sample. Towards this end, we adapt oblique back-illumination microscopy (OBM) to rapidly, inexpensively, and non-invasively screen blood bags for red blood cell (RBC) morphology and white blood cell (WBC) count. OBM has been recently introduced as a tomographic technique that produces high-resolution wide-field images based on phase-gradient and transmission. Here we modify this technique to include illumination at dual wavelengths to facilitate spectral analysis for cell classification. Further, we apply a modified 2D Hilbert transform to recover the phase information from the phase-gradient images for facile cell segmentation. Blood cells are classified as WBCs and RBCs, and counted based on shape, absorption spectrum, and phase profile using an automated algorithm. This work has important implications for the non-invasive assessment of (1) cell viability in storage bags for transfusion applications and (2) suitability of a cord blood collection bag for stem cell therapy applications.
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Affiliation(s)
- Patrick Ledwig
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA
| | - Moses Sghayyer
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA
| | - Joanne Kurtzberg
- Carolinas Cord Blood Bank, Durham, NC
- Department of Pediatrics, Duke University Medical Center, Durham, NC 27705,
USA
| | - Francisco E. Robles
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA
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4
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Ban S, Min E, Baek S, Kwon HM, Popescu G, Jung W. Optical properties of acute kidney injury measured by quantitative phase imaging. Biomed Opt Express 2018; 9:921-932. [PMID: 29541494 PMCID: PMC5846539 DOI: 10.1364/boe.9.000921] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 01/25/2018] [Indexed: 05/20/2023]
Abstract
The diagnosis of acute kidney disease (AKI) has been examined mainly by histology, immunohistochemistry and western blot. Though these approaches are widely accepted in the field, it has an inherent limitation due to the lack of high-throughput and quantitative information. For a better understanding of prognosis in AKI, we present a new approach using quantitative phase imaging combined with a wide-field scanning platform. Through the phase-delay information from the tissue, we were able to predict a stage of AKI based on various optical properties such as light scattering coefficient and anisotropy. These optical parameters quantify the deterioration process of the AKI model of tissue. Our device would be a very useful tool when it is required to deliver fast feedback of tissue pathology or when diseases are related to mechanical properties such as fibrosis.
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Affiliation(s)
- Sungbea Ban
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
- These authors contributed equally to this work
| | - Eunjung Min
- Rowland Institute, Harvard University, Boston, Massachusetts, USA
- These authors contributed equally to this work
| | - Songyee Baek
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
| | - Hyug Moo Kwon
- Department of Biological Science, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
| | - Gabriel Popescu
- Quantitative Light Imaging Laboratory, Department of Electrical and Computer Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Woonggyu Jung
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
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5
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Lawman S, Madden PW, Romano V, Dong Y, Mason S, Williams BM, Kaye SB, Willoughby CE, Harding SP, Shen YC, Zheng Y. Deformation velocity imaging using optical coherence tomography and its applications to the cornea. Biomed Opt Express 2017; 8:5579-5593. [PMID: 29296489 PMCID: PMC5745104 DOI: 10.1364/boe.8.005579] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 10/06/2017] [Accepted: 10/09/2017] [Indexed: 05/07/2023]
Abstract
Optical coherence tomography (OCT) can monitor human donor corneas non-invasively during the de-swelling process following storage for corneal transplantation, but currently only resultant thickness as a function of time is extracted. To visualize and quantify the mechanism of de-swelling, we present a method exploiting the nanometer sensitivity of the Fourier phase in OCT data to image deformation velocities. The technique was demonstrated by non-invasively showing during de-swelling that osmotic flow through an intact epithelium is negligible and removing the endothelium approximately doubled the initial flow at that interface. The increased functional data further enabled the validation of a mathematical model of the cornea. Included is an efficient method of measuring high temporal resolution (1 minute demonstrated) corneal thickness, using automated collection and semi-automated graph search segmentation. These methods expand OCT capabilities to measure volume change processes for tissues and materials.
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Affiliation(s)
- Samuel Lawman
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, L69 3GJ, UK
- Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, UK
| | - Peter W. Madden
- Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, UK
| | - Vito Romano
- Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, UK
- St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool L7 8XP, UK
| | - Yue Dong
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, L69 3GJ, UK
| | - Sharon Mason
- Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, UK
| | - Bryan M. Williams
- Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, UK
| | - Stephen B. Kaye
- Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, UK
- St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool L7 8XP, UK
| | - Colin E. Willoughby
- Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, UK
- St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool L7 8XP, UK
| | - Simon P. Harding
- Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, UK
- St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool L7 8XP, UK
| | - Yao-Chun Shen
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, L69 3GJ, UK
| | - Yalin Zheng
- Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, UK
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6
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Lan G, Singh M, Larin KV, Twa MD. Common-path phase-sensitive optical coherence tomography provides enhanced phase stability and detection sensitivity for dynamic elastography. Biomed Opt Express 2017; 8:5253-5266. [PMID: 29188118 PMCID: PMC5695968 DOI: 10.1364/boe.8.005253] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 10/16/2017] [Accepted: 10/23/2017] [Indexed: 05/08/2023]
Abstract
Phase-sensitive optical coherence elastography (PhS-OCE) is an emerging optical technique to quantify soft-tissue biomechanical properties. We implemented a common-path OCT design to enhance displacement sensitivity and optical phase stability for dynamic elastography imaging. The background phase stability was greater in common-path PhS-OCE (0.24 ± 0.07nm) than conventional PhS-OCE (1.60 ± 0.11μm). The coefficient of variation for surface displacement measurements using conventional PhS-OCE averaged 11% versus 2% for common-path PhS-OCE. Young's modulus estimates showed good precision (95% CIs) for tissue phantoms: 24.96 ± 2.18kPa (1% agar), 49.69 ± 4.87kPa (1.5% agar), and 116.08 ± 12.14kPa (2% agar), respectively. Common-path PhS-OCE effectively reduced the amplitude of background dynamic optical phase instability to a sub-nanometer level, which provided a larger dynamic detection range and higher detection sensitivity for surface displacement measurements than conventional PhS-OCE.
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Affiliation(s)
- Gongpu Lan
- School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Manmohan Singh
- Biomedical Engineering, University of Houston, Houston, TX, USA
| | - Kirill V. Larin
- Biomedical Engineering, University of Houston, Houston, TX, USA
- Interdisciplinary Laboratory of Biophotonics, Tomsk State University, Tomsk, Russia
| | - Michael D. Twa
- School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA
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7
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Batabyal S, Satpathy S, Bui L, Kim YT, Mohanty S, Bachoo R, Davé DP. Label-free optical detection of action potential in mammalian neurons. Biomed Opt Express 2017; 8:3700-3713. [PMID: 28856044 PMCID: PMC5560835 DOI: 10.1364/boe.8.003700] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/26/2017] [Accepted: 06/27/2017] [Indexed: 05/08/2023]
Abstract
We describe an optical technique for label-free detection of the action potential in cultured mammalian neurons. Induced morphological changes due to action potential propagation in neurons are optically interrogated with a phase sensitive interferometric technique. Optical recordings composed of signal pulses mirror the electrical spike train activity of individual neurons in a network. The optical pulses are transient nanoscale oscillatory changes in the optical path length of varying peak magnitude and temporal width. Exogenous application of glutamate to cortical neuronal cultures produced coincident increase in the electrical and optical activity; both were blocked by application of a Na-channel blocker, Tetrodotoxin. The observed transient change in optical path length in a single optical pulse is primarily due to physical fluctuations of the neuronal cell membrane mediated by a yet unknown electromechanical transduction phenomenon. Our analysis suggests a traveling surface wave in the neuronal cell membrane is responsible for the measured optical signal pulses.
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Affiliation(s)
- Subrata Batabyal
- Nanoscope Technologies, Arlington, TX, USA
- Nanoscope Technologies, Arlington, TX, USA
- Equal Contribution
| | - Sarmishtha Satpathy
- Department of Electrical Engineering, University of Texas at Arlington, TX, USA
- Equal Contribution
| | - Loan Bui
- Department of Bioengineering, University of Texas at Arlington, TX, USA
| | - Young-Tae Kim
- Department of Bioengineering, University of Texas at Arlington, TX, USA
| | | | - Robert Bachoo
- Department of Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Digant P Davé
- Department of Bioengineering, University of Texas at Arlington, TX, USA
- Advance Imaging Research Centre, University of Texas Southwestern Medical Center, Dallas, TX, USA
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8
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Ling Y, Yao X, Hendon CP. Highly phase-stable 200 kHz swept-source optical coherence tomography based on KTN electro-optic deflector. Biomed Opt Express 2017; 8:3687-3699. [PMID: 29082103 PMCID: PMC5560834 DOI: 10.1364/boe.8.003687] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 07/08/2017] [Accepted: 07/08/2017] [Indexed: 05/04/2023]
Abstract
The rapid advance in swept-source optical coherence tomography (SS-OCT) technology has enabled exciting new applications in elastography, angiography, and vibrometry, where both high temporal resolution and phase stability are highly sought-after. In this paper, we present a 200 kHz SS-OCT system centered at 1321 nm by using an electro-optically tuned swept source. The proposed system's performance was fully characterized, and it possesses superior phase stability (0.0012% scanning variability and <1 ns timing jitter) that is promising for many phase-sensitive imaging applications. Biological experiments were demonstrated within ex vivo human tracheobronchial ciliated epithelium where both the ciliary motion and ciliary beat frequency were successfully extracted.
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9
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Makita S, Yasuno Y. Detection of local tissue alteration during retinal laser photocoagulation of ex vivo porcine eyes using phase-resolved optical coherence tomography. Biomed Opt Express 2017; 8:3067-3080. [PMID: 28663927 PMCID: PMC5480450 DOI: 10.1364/boe.8.003067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 05/17/2017] [Accepted: 05/17/2017] [Indexed: 05/03/2023]
Abstract
Retinal laser photocoagulation is used to treat several ophthalmic diseases. However, it is associated with damage to surrounding healthy tissue. Local tissue alteration during coagulation laser illumination was measured using phase-resolved optical coherence tomography (OCT) M-mode scan as a change in the local optical path length (LOPL). A metric that represents global net tissue alteration was defined using the LOPL change. The visibility of a laser lesion was assessed by three-dimensional OCT volume measurement. Multiple logistic regression analysis was performed to investigate the association between the introduced metric and the laser lesion visibility. The metric was found to be a statistically significant predictor of the laser lesion visibility independent to laser condition. The proposed method based on an LOPL change is thus promising for retinal photocoagulation monitoring.
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10
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Min E, Ban S, Wang Y, Bae SC, Popescu G, Best-Popescu C, Jung W. Measurement of multispectral scattering properties in mouse brain tissue. Biomed Opt Express 2017; 8:1763-1770. [PMID: 28663864 PMCID: PMC5480579 DOI: 10.1364/boe.8.001763] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 02/10/2017] [Accepted: 02/14/2017] [Indexed: 05/26/2023]
Abstract
We present the scattering properties of mouse brain using multispectral diffraction phase microscopy. Typical diffraction phase microscopy was incorporated with the broadband light source which offers the measurement of the scattering coefficient and anisotropy in the spectral range of 550-900 nm. The regional analysis was performed for both the myeloarchitecture and cytoarchitecture of the brain tissue. Our results clearly evaluate the multispectral scattering properties in the olfactory bulb and corpus callosum. The scattering coefficient measured in the corpus callosum is about four times higher than in the olfactory bulb. It also indicates that it is feasible to realize the quantitative phase microscope in near infrared region for thick brain tissue imaging.
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Affiliation(s)
- Eunjung Min
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
- Quantitative Light Imaging Laboratory, Department of Electrical and Computer Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- These authors contributed equally to this work
| | - Sungbea Ban
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
- These authors contributed equally to this work
| | - Yanyan Wang
- Department of Pharmacology and Beckman Institute, University of Illinois at Urbana-Champaign (UIUC), Urbana, IL 61801, USA
| | - Sung Chul Bae
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
| | - Gabriel Popescu
- Quantitative Light Imaging Laboratory, Department of Electrical and Computer Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Catherine Best-Popescu
- Cellular Neuroscience and Imaging Laboratory, Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Woonggyu Jung
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, South Korea
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11
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Tong MQ, Hasan MM, Lee SS, Haque MR, Kim DH, Islam MS, Adams ME, Park BH. OCT intensity and phase fluctuations correlated with activity-dependent neuronal calcium dynamics in the Drosophila CNS [Invited]. Biomed Opt Express 2017; 8:726-735. [PMID: 28270979 PMCID: PMC5330578 DOI: 10.1364/boe.8.000726] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 01/04/2017] [Accepted: 01/06/2017] [Indexed: 05/09/2023]
Abstract
Phase-resolved OCT and fluorescence microscopy were used simultaneously to examine stereotypic patterns of neural activity in the isolated Drosophila central nervous system. Both imaging modalities were focused on individually identified bursicon neurons known to be involved in a fixed action pattern initiated by ecdysis-triggering hormone. We observed clear correspondence of OCT intensity, phase fluctuations, and activity-dependent calcium-induced fluorescence.
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Affiliation(s)
- Minh Q. Tong
- Graduate Program in Neuroscience, University of California, Riverside, CA 92521, USA
| | - Md. Monirul Hasan
- Department of Bioengineering, University of California, 900 University Ave, Riverside, CA 92521, USA
| | - Sang Soo Lee
- Graduate Program in Neuroscience, University of California, Riverside, CA 92521, USA
| | - Md. Rezuanul Haque
- Department of Bioengineering, University of California, 900 University Ave, Riverside, CA 92521, USA
| | - Do-Hyoung Kim
- Department of Entomology, University of California, 900 University Ave, Riverside, CA 92521, USA
- Current Affiliation Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Md. Shahidul Islam
- Department of Bioengineering, University of California, 900 University Ave, Riverside, CA 92521, USA
| | - Michael E. Adams
- Graduate Program in Neuroscience, University of California, Riverside, CA 92521, USA
- Department of Entomology, University of California, 900 University Ave, Riverside, CA 92521, USA
- Department of Cell Biology & Neuroscience, University of California, 900 University Ave, Riverside, CA 92521, USA
| | - B. Hyle Park
- Department of Bioengineering, University of California, 900 University Ave, Riverside, CA 92521, USA
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12
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Ba C, Palmiere M, Ritt J, Mertz J. Dual-modality endomicroscopy with co-registered fluorescence and phase contrast. Biomed Opt Express 2016; 7:3403-3411. [PMID: 27699107 PMCID: PMC5030019 DOI: 10.1364/boe.7.003403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 08/08/2016] [Accepted: 08/08/2016] [Indexed: 05/09/2023]
Abstract
We describe a dual-modality laser scanning endomicroscope that provides simultaneous fluorescence contrast based on confocal laser endomicroscopy (CLE) and phase-gradient contrast based on scanning oblique back-scattering microscopy (sOBM). The probe consists of a 2.6mm-diameter micro-objective attached to a 30,000-core flexible fiber bundle. The dual contrasts are inherently co-registered, providing complementary information on labeled and un-labeled sample structure. Proof of principle demonstrations are presented with ex-vivo mouse colon tissue.
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13
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Park J, Cheng JT, Ferguson D, Maguluri G, Chang EW, Clancy C, Lee DJ, Iftimia N. Investigation of middle ear anatomy and function with combined video otoscopy-phase sensitive OCT. Biomed Opt Express 2016; 7:238-50. [PMID: 26977336 PMCID: PMC4771445 DOI: 10.1364/boe.7.000238] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 12/09/2015] [Accepted: 12/17/2015] [Indexed: 05/20/2023]
Abstract
We report the development of a novel otoscopy probe for assessing middle ear anatomy and function. Video imaging and phase-sensitive optical coherence tomography are combined within the same optical path. A sound stimuli channel is incorporated as well to study middle ear function. Thus, besides visualizing the morphology of the middle ear, the vibration amplitude and frequency of the eardrum and ossicles are retrieved as well. Preliminary testing on cadaveric human temporal bone models has demonstrated the capability of this instrument for retrieving middle ear anatomy with micron scale resolution, as well as the vibration of the tympanic membrane and ossicles with sub-nm resolution.
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Affiliation(s)
- Jesung Park
- Physical Sciences Inc., Andover, MA 01810, USA
| | - Jeffrey T. Cheng
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA
| | | | | | | | | | - Daniel J. Lee
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA
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14
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Chen C, Zhao Y, Yang S, Xing D. Mechanical characterization of intraluminal tissue with phase-resolved photoacoustic viscoelasticity endoscopy. Biomed Opt Express 2015; 6:4975-80. [PMID: 26713209 PMCID: PMC4679269 DOI: 10.1364/boe.6.004975] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 11/11/2015] [Accepted: 11/11/2015] [Indexed: 05/24/2023]
Abstract
We developed a phase-sensitive side-scanning photoacoustic viscoelasticity endoscopy (PAVEE) for mechanical characterization of intraluminal tissues. In PAVEE, the PA phase can be extracted from the optical absorption induced ultrasonic waves and provides an index of viscoelasticity that is closely linked to tissue compositions. The transverse resolution of the PAVEE measured by carbon fiber was about 32 μm. The imaging capability of the PAVEE was verified using a vessel-mimicking phantom with different agar density. Moreover, PAVEE was investigated in processed lumen-shaped vascular tissues to evaluate the biomechanical features, which was highly consistent with the histology. The results demonstrated that the PAVEE can obtain viscoelastic properties of intraluminal tissues, which puts a new insight into the intravascular disease and holds great promise for plaque vulnerability detection.
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Affiliation(s)
- Conggui Chen
- MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Yue Zhao
- MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Sihua Yang
- MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China ;
| | - Da Xing
- MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China ;
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15
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Rinehart MT, Park HS, Wax A. Influence of defocus on quantitative analysis of microscopic objects and individual cells with digital holography. Biomed Opt Express 2015; 6:2067-75. [PMID: 26114029 PMCID: PMC4473744 DOI: 10.1364/boe.6.002067] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 04/20/2015] [Accepted: 05/01/2015] [Indexed: 05/18/2023]
Abstract
Digital holography offers a unique method for studying microscopic objects using quantitative measurements of the optical phase delays of transmitted light. The optical phase may be integrated across the object to produce an optical volume measurement, a parameter related to dry mass by a simple scaling factor. While digital holography is useful for comparing the properties of microscopic objects, especially cells, we show here that quantitative comparisons of optical phase can be influenced by the focal plane of the measurement. Although holographic images can be refocused digitally using Fresnel propagation, ambiguity can result if this aspect is not carefully controlled. We demonstrate that microscopic objects can be accurately profiled by employing a digital refocusing method to analyze phase profiles of polystyrene microspheres and red blood cells.
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16
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Makita S, Yasuno Y. In vivo photothermal optical coherence tomography for non-invasive imaging of endogenous absorption agents. Biomed Opt Express 2015; 6:1707-25. [PMID: 26137374 PMCID: PMC4467701 DOI: 10.1364/boe.6.001707] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 04/04/2015] [Indexed: 05/19/2023]
Abstract
In vivo photothermal optical coherence tomography (OCT) is demonstrated for cross-sectional imaging of endogenous absorption agents. In order to compromise the sensitivity, imaging speed, and sample motion immunity, a new photothermal detection scheme and phase processing method are developed. Phase-resolved swept-source OCT and fiber-pigtailed laser diode (providing excitation at 406 nm) are combined to construct a high-sensitivity photothermal OCT system. OCT probe and excitation beam coaxially illuminate and are focused on tissues. The photothermal excitation and detection procedure is designed to obtain high efficiency of photothermal effect measurement. The principle and method of depth-resolved cross-sectional imaging of absorption agents with photothermal OCT has been derived. The phase-resolved thermal expansion detection algorithm without motion artifact enables in vivo detection of photothermal effect. Phantom imaging with a blood phantom and in vivo human skin imaging are conducted. A phantom with guinea-pig blood as absorber has been scanned by the photothermal OCT system to prove the concept of cross-sectional absorption agent imaging. An in vivo human skin measurement is also performed with endogenous absorption agents.
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Affiliation(s)
- Shuichi Makita
- Computational Optics Group, University of Tsukuba, Tsukuba, 305-8573,
Japan
| | - Yoshiaki Yasuno
- Computational Optics Group, University of Tsukuba, Tsukuba, 305-8573,
Japan
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17
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Shang R, Chen S, Li C, Zhu Y. Spectral modulation interferometry for quantitative phase imaging. Biomed Opt Express 2015; 6:473-9. [PMID: 25780737 PMCID: PMC4354583 DOI: 10.1364/boe.6.000473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 12/21/2014] [Accepted: 12/28/2014] [Indexed: 05/09/2023]
Abstract
We propose a spectral-domain interferometric technique, termed spectral modulation interferometry (SMI), and present its application to high-sensitivity, high-speed, and speckle-free quantitative phase imaging. In SMI, one-dimensional complex field of an object is interferometrically modulated onto a broadband spectrum. Full-field phase and intensity images are obtained by scanning along the orthogonal direction. SMI integrates the high sensitivity of spectral-domain interferometry with the high speed of spectral modulation to quantify fast phase dynamics, and its dispersive and confocal nature eliminates laser speckles. The principle and implementation of SMI are discussed. Its performance is evaluated using static and dynamic objects.
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18
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Schubert R, Vollmer A, Ketelhut S, Kemper B. Enhanced quantitative phase imaging in self-interference digital holographic microscopy using an electrically focus tunable lens. Biomed Opt Express 2014; 5:4213-22. [PMID: 25574433 PMCID: PMC4285600 DOI: 10.1364/boe.5.004213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 10/11/2014] [Accepted: 10/17/2014] [Indexed: 05/02/2023]
Abstract
Self-interference digital holographic microscopy (DHM) has been found particular suitable for simplified quantitative phase imaging of living cells. However, a main drawback of the self-interference DHM principle are scattering patterns that are induced by the coherent nature of the laser light which affect the resolution for detection of optical path length changes. We present a simple and efficient technique for the reduction of coherent disturbances in quantitative phase images. Therefore, amplitude and phase of the sample illumination are modulated by an electrically focus tunable lens. The proposed method is in particular convenient with the self-interference DHM concept. Results from the characterization of the method show that a reduction of coherence induced disturbances up to 70 percent can be achieved. Finally, the performance for enhanced quantitative imaging of living cells is demonstrated.
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Affiliation(s)
- Robin Schubert
- Center for Biomedical Optics and Photonics, University of Muenster, Robert-Koch-Str. 45, D-48149 Muenster,
Germany
- George Huntington Institute, Johann-Krane-Weg 27, D-48149 Muenster,
Germany
| | - Angelika Vollmer
- Center for Biomedical Optics and Photonics, University of Muenster, Robert-Koch-Str. 45, D-48149 Muenster,
Germany
| | - Steffi Ketelhut
- Biomedical Technology Center, University of Muenster, Mendelstr. 17, D-48149 Muenster,
Germany
| | - Björn Kemper
- Biomedical Technology Center, University of Muenster, Mendelstr. 17, D-48149 Muenster,
Germany
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19
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Vuong B, Genis H, Wong R, Ramjist J, Jivraj J, Farooq H, Sun C, Yang VX. Evaluation of flow velocities after carotid artery stenting through split spectrum Doppler optical coherence tomography and computational fluid dynamics modeling. Biomed Opt Express 2014; 5:4405-16. [PMID: 25574447 PMCID: PMC4285614 DOI: 10.1364/boe.5.004405] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 11/17/2014] [Accepted: 11/19/2014] [Indexed: 06/04/2023]
Abstract
Hemodynamics plays a critical role in the development of atherosclerosis, specifically in regions of curved vasculature such as bifurcations exhibiting irregular blood flow profiles. Carotid atherosclerotic disease can be intervened by stent implantation, but this may result in greater alterations to local blood flow and consequently further complications. This study demonstrates the use of a variant of Doppler optical coherence tomography (DOCT) known as split spectrum DOCT (ssDOCT) to evaluate hemodynamic patterns both before and after stent implantation in the bifurcation junction in the internal carotid artery (ICA). Computational fluid dynamics (CFD) models were constructed to simulate blood velocity profiles and compared to the findings achieved through ssDOCT images. Both methods demonstrated noticeable alterations in hemodynamic patterns following stent implantation, with features such as slow velocity regions at the neck of the bifurcation and recirculation zones at the stent struts. Strong correlation between CFD models and ssDOCT images demonstrate the potential of ssDOCT imaging in the optimization of stent implantation in the clinical setting.
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Affiliation(s)
- Barry Vuong
- Biophotonics and Bioengineering Laboratory, Dept. Electrical and Computer Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3,
Canada
| | - Helen Genis
- Biophotonics and Bioengineering Laboratory, Dept. Electrical and Computer Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3,
Canada
| | - Ronnie Wong
- Biophotonics and Bioengineering Laboratory, Dept. Electrical and Computer Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3,
Canada
| | - Joel Ramjist
- Biophotonics and Bioengineering Laboratory, Dept. Electrical and Computer Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3,
Canada
| | - Jamil Jivraj
- Biophotonics and Bioengineering Laboratory, Dept. Electrical and Computer Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3,
Canada
| | - Hamza Farooq
- Biophotonics and Bioengineering Laboratory, Dept. Electrical and Computer Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3,
Canada
| | - Cuiru Sun
- Biophotonics and Bioengineering Laboratory, Dept. Electrical and Computer Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3,
Canada
| | - Victor X.D. Yang
- Biophotonics and Bioengineering Laboratory, Dept. Electrical and Computer Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3,
Canada
- Physical Science - Brain Sciences Research Program, Sunnybrook Research Institute, 2075 Bayview Avenue,Toronto, ON, M4N 3M5,
Canada
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue Toronto, ON, M4N 3M5,
Canada
- Division of Neurosurgery, Faculty of Medicine, University of Toronto, 1 King’s College Circle, Toronto, ON, M5S 1A8,
Canada
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20
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Wang S, Larin KV. Noncontact depth-resolved micro-scale optical coherence elastography of the cornea. Biomed Opt Express 2014; 5:3807-21. [PMID: 25426312 PMCID: PMC4242019 DOI: 10.1364/boe.5.003807] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 09/25/2014] [Accepted: 09/27/2014] [Indexed: 05/18/2023]
Abstract
High-resolution elastographic assessment of the cornea can greatly assist clinical diagnosis and treatment of various ocular diseases. Here, we report on the first noncontact depth-resolved micro-scale optical coherence elastography of the cornea achieved using shear wave imaging optical coherence tomography (SWI-OCT) combined with the spectral analysis of the corneal Lamb wave propagation. This imaging method relies on a focused air-puff device to load the cornea with highly-localized low-pressure short-duration air stream and applies phase-resolved OCT detection to capture the low-amplitude deformation with nano-scale sensitivity. The SWI-OCT system is used here to image the corneal Lamb wave propagation with the frame rate the same as the OCT A-line acquisition speed. Based on the spectral analysis of the corneal temporal deformation profiles, the phase velocity of the Lamb wave is obtained at different depths for the major frequency components, which shows the depthwise distribution of the corneal stiffness related to its structural features. Our pilot experiments on ex vivo rabbit eyes demonstrate the feasibility of this method in depth-resolved micro-scale elastography of the cornea. The assessment of the Lamb wave dispersion is also presented, suggesting the potential for the quantitative measurement of corneal viscoelasticity.
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Affiliation(s)
- Shang Wang
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Blvd., Houston, Texas 77204-5060,
USA
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030,
USA
| | - Kirill V. Larin
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Blvd., Houston, Texas 77204-5060,
USA
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030,
USA
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21
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Pelliccia D, Paganin DM. Multi-modal hard x-ray imaging with a laboratory source using selective reflection from a mirror. Biomed Opt Express 2014; 5:1153-1159. [PMID: 24761297 PMCID: PMC3985998 DOI: 10.1364/boe.5.001153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 03/08/2014] [Accepted: 03/10/2014] [Indexed: 06/03/2023]
Abstract
Multi-modal hard x-ray imaging sensitive to absorption, refraction, phase and scattering contrast is demonstrated using a simple setup implemented with a laboratory source. The method is based on selective reflection at the edge of a mirror, aligned to partially reflect a pencil x-ray beam after its interaction with a sample. Quantitative scattering contrast from a test sample is experimentally demonstrated using this method. Multi-modal imaging of a house fly (Musca domestica) is shown as proof of principle of the technique for biological samples.
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22
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Fathi N, Moradi AR, Habibi M, Vashaee D, Tayebi L. Digital holographic microscopy of the myelin figure structural dynamics and the effect of thermal gradient. Biomed Opt Express 2013; 4:950-957. [PMID: 23760951 PMCID: PMC3675873 DOI: 10.1364/boe.4.000950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 04/11/2013] [Accepted: 04/19/2013] [Indexed: 06/02/2023]
Abstract
Myelin figures (MFs) are cylindrical multilamellar lipid tubes that can be found in various healthy and diseased living cells. Their formation and dynamics involve some of the most mysterious configurations that lipid molecules can adopt under certain conditions. They have been studied with different microscopy methods. Due to the frequent coiling of their structure, the usual methods of microscopy fail to give precise quantitative information about their dynamics. In this paper, we introduced Digital Holographic Microscopy (DHM) as a useful method to calculate the precise dynamical volume, thickness, surface and length of the myelin figures. As an example of DHM imaging of myelin figures, their structure and growth rate in the presence and absence of temperature gradient have been studied in this work. We showed that the thickness of a myelin figure can be changed during the first few seconds. However, after approximately ten seconds, the thickness stabilizes and does not alter significantly. We further studied the effect of the thermal gradient on the length growth. The calculation of the length growth from the measurement of the myelin figure volume shows that the length (L) grows in time (t) as [Formula: see text]at the early stage of the myelin protrusion in both the presence and the absence of the thermal gradient. However, thermal gradient facilitates the growth and increases its rate.
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Affiliation(s)
- Narges Fathi
- Department of Physics, University of Zanjan, PO Box 45195-313, Zanjan, Iran
| | - Ali-Reza Moradi
- Department of Physics, University of Zanjan, PO Box 45195-313, Zanjan, Iran
- Optics Research Center, Institute for Advanced Studies in Basic Sciences, PO Box 45137-66731, Zanjan, Iran
| | - Mehdi Habibi
- Department of Physics, Institute for Advanced Studies in Basic Sciences, PO Box 45195-1159, Zanjan, Iran
- Van der Waals-Zeeman Institute, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands
| | - Daryoosh Vashaee
- Helmerich Advanced Technology Research Center, School of Electrical and Computer Engineering, Oklahoma State University, OK 74106, USA
| | - Lobat Tayebi
- Helmerich Advanced Technology Research Center, School of Material Science and Engineering, Oklahoma State University, Tulsa, OK 74106, USA
- School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
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23
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Wang S, Aglyamov S, Karpiouk A, Li J, Emelianov S, Manns F, Larin KV. Assessing the mechanical properties of tissue-mimicking phantoms at different depths as an approach to measure biomechanical gradient of crystalline lens. Biomed Opt Express 2013; 4:2769-80. [PMID: 24409379 PMCID: PMC3862146 DOI: 10.1364/boe.4.002769] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 11/05/2013] [Accepted: 11/06/2013] [Indexed: 05/12/2023]
Abstract
We demonstrate the feasibility of using the dominant frequency of the sample surface response to a mechanical stimulation as an effective indicator for sensing the depthwise distribution of elastic properties in transparent layered phantom samples simulating the cortex and nucleus of the crystalline lens. Focused ultrasound waves are used to noninvasively interrogate the sample surface. A phase-sensitive optical coherence tomography system is utilized to capture the surface dynamics over time with nanometer scale sensitivity. Spectral analysis is performed on the sample surface response to ultrasound stimulation and the dominant frequency is calculated under particular loading parameters. Pilot experiments were conducted on homogeneous and layered tissue-mimicking phantoms. Results indicate that the mechanical layers located at different depths introduce different frequencies to the sample surface response, which are correlated with the depth-dependent elasticity of the sample. The duration and the frequency of the ultrasound excitation are also investigated for their influences on this spectrum-based detection. This noninvasive method may be potentially applied for localized and rapid assessment of the depth dependence of the mechanical properties of the crystalline lens.
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Affiliation(s)
- Shang Wang
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
| | - Salavat Aglyamov
- Department of Biomedical Engineering, The University of Texas at Austin, 107 W Dean Keeton Street, Austin, Texas 78712, USA
| | - Andrei Karpiouk
- Department of Biomedical Engineering, The University of Texas at Austin, 107 W Dean Keeton Street, Austin, Texas 78712, USA
| | - Jiasong Li
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
| | - Stanislav Emelianov
- Department of Biomedical Engineering, The University of Texas at Austin, 107 W Dean Keeton Street, Austin, Texas 78712, USA
| | - Fabrice Manns
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, 1638 NW 10th Avenue, Miami, Florida 33136, USA
- Biomedical Optics and Laser Laboratory, Department of Biomedical Engineering, University of Miami College of Engineering, 1251 Memorial Drive, Coral Gables, Florida 33146, USA
| | - Kirill V. Larin
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
- Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77584, USA
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24
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Bhaduri B, Tangella K, Popescu G. Fourier phase microscopy with white light. Biomed Opt Express 2013; 4:1434-41. [PMID: 24010005 PMCID: PMC3756570 DOI: 10.1364/boe.4.001434] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/21/2013] [Accepted: 07/22/2013] [Indexed: 05/18/2023]
Abstract
Laser-based Fourier phase microscopy (FPM) works on the principle of decomposition of an image field in two spatial components that can be controllably shifted in phase with respect to each other. However, due to the coherent illumination, the contrast in phase images is degraded by speckles. In this paper we present FPM with spatially coherent white light (wFPM), which offers high spatial phase sensitivity due to the low temporal coherence and high temporal phase stability due to common path geometry. Further, by using a fast spatial light modulator (SLM) and a fast scientific-grade complementary metal oxide semiconductor (sCMOS) camera, we report imaging at a maximum rate of 12.5 quantitative phase frames per second with 5.5 mega pixels image size. We illustrate the utility of wFPM as a contrast enhancement as well as dynamic phase measurement method by imaging section of benign colonic glands and red blood cell membrane fluctuation.
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Affiliation(s)
- Basanta Bhaduri
- Quantitative Light Imaging Laboratory, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Krishnarao Tangella
- Christie Clinic and University of Illinois at Urbana-Champaign, Department of Pathology 1400 West Park Street, Urbana, Illinois 61801, USA
| | - Gabriel Popescu
- Quantitative Light Imaging Laboratory, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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25
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Creath K, Goldstein G. Dynamic quantitative phase imaging for biological objects using a pixelated phase mask. Biomed Opt Express 2012; 3:2866-80. [PMID: 23162725 PMCID: PMC3493224 DOI: 10.1364/boe.3.002866] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 08/25/2012] [Accepted: 09/11/2012] [Indexed: 05/20/2023]
Abstract
This paper describes research in developing a dynamic quantitative phase imaging microscope providing instantaneous measurements of dynamic motions within and among live cells without labels or contrast agents. It utilizes a pixelated phase mask enabling simultaneous measurement of multiple interference patterns derived using the polarization properties of light to track dynamic motions and morphological changes. Optical path difference (OPD) and optical thickness (OT) data are obtained from phase images. Two different processing routines are presented to remove background surface shape to enable quantification of changes in cell position and volume over time. Data from a number of different moving biological organisms and cell cultures are presented.
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Affiliation(s)
- Katherine Creath
- 4D Technology Corp, 3280 E Hemisphere Loop, Ste 146, Tucson, AZ
85706, USA
- College of Optical Sciences, The University of Arizona, 1680 E
University Blvd, Tucson, AZ 85721, USA
- Optineering, 2247 E La Mirada St, Tucson, AZ 85719,
USA
| | - Goldie Goldstein
- 4D Technology Corp, 3280 E Hemisphere Loop, Ste 146, Tucson, AZ
85706, USA
- College of Optical Sciences, The University of Arizona, 1680 E
University Blvd, Tucson, AZ 85721, USA
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26
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Sun C, Nolte F, Cheng KHY, Vuong B, Lee KKC, Standish BA, Courtney B, Marotta TR, Mariampillai A, Yang VXD. In vivo feasibility of endovascular Doppler optical coherence tomography. Biomed Opt Express 2012; 3:2600-10. [PMID: 23082299 PMCID: PMC3470007 DOI: 10.1364/boe.3.002600] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 09/12/2012] [Accepted: 09/15/2012] [Indexed: 05/20/2023]
Abstract
Feasibility of detecting intravascular flow using a catheter based endovascular optical coherence tomography (OCT) system is demonstrated in a porcine carotid model in vivo. The effects of A-line density, radial distance, signal-to-noise ratio, non-uniform rotational distortion (NURD), phase stability of the swept wavelength laser and interferometer system on Doppler shift detection limit were investigated in stationary and flow phantoms. Techniques for NURD induced phase shift artifact removal were developed by tracking the catheter sheath. Detection of high flow velocity (~51 cm/s) present in the porcine carotid artery was obtained by phase unwrapping techniques and compared to numerical simulation, taking into consideration flow profile distortion by the eccentrically positioned imaging catheter. Using diluted blood in saline mixture as clearing agent, simultaneous Doppler OCT imaging of intravascular flow and structural OCT imaging of the carotid artery wall was feasible. To our knowledge, this is the first in vivo demonstration of Doppler imaging and absolute measurement of intravascular flow using a rotating fiber catheter in carotid artery.
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Affiliation(s)
- Cuiru Sun
- Biophotonics and Bioengineering Laboratory, Dept.
Electrical and Computer Engineering, Ryerson University, 350 Victoria St.
Toronto, ON, M5B2K3 Canada
- These authors contributed equally to this work
| | - Felix Nolte
- Biophotonics and Bioengineering Laboratory, Dept.
Electrical and Computer Engineering, Ryerson University, 350 Victoria St.
Toronto, ON, M5B2K3 Canada
- Faculty of Electrical Engineering and Information
Technology, University of Applied Sciences, Karlsruhe, Moltkestraße 30,
76133 Karlsruhe, Germany
- These authors contributed equally to this work
| | - Kyle H. Y. Cheng
- Biophotonics and Bioengineering Laboratory, Dept.
Electrical and Computer Engineering, Ryerson University, 350 Victoria St.
Toronto, ON, M5B2K3 Canada
- Dept. Electrical and Computer Engineering, University
of Toronto, 27 King's College Circle, Toronto, Ontario, M5S 1A1,
Canada
| | - Barry Vuong
- Biophotonics and Bioengineering Laboratory, Dept.
Electrical and Computer Engineering, Ryerson University, 350 Victoria St.
Toronto, ON, M5B2K3 Canada
| | - Kenneth K. C. Lee
- Biophotonics and Bioengineering Laboratory, Dept.
Electrical and Computer Engineering, Ryerson University, 350 Victoria St.
Toronto, ON, M5B2K3 Canada
- Dept. Electrical and Computer Engineering, University
of Toronto, 27 King's College Circle, Toronto, Ontario, M5S 1A1,
Canada
| | - Beau A. Standish
- Biophotonics and Bioengineering Laboratory, Dept.
Electrical and Computer Engineering, Ryerson University, 350 Victoria St.
Toronto, ON, M5B2K3 Canada
- Faculty of Electrical Engineering and Information
Technology, University of Applied Sciences, Karlsruhe, Moltkestraße 30,
76133 Karlsruhe, Germany
| | - Brian Courtney
- Colibri Technologies Inc., 3080 Yonge Street,
Toronto, ON, M4N 3N1, Canada
| | - Thomas R. Marotta
- Dept. of Medical Imaging, St. Michael’s
Hospital, 30 Bond Street, Toronto, ON, M5B 1W8, Canada
| | - Adrian Mariampillai
- Biophotonics and Bioengineering Laboratory, Dept.
Electrical and Computer Engineering, Ryerson University, 350 Victoria St.
Toronto, ON, M5B2K3 Canada
| | - Victor X. D. Yang
- Biophotonics and Bioengineering Laboratory, Dept.
Electrical and Computer Engineering, Ryerson University, 350 Victoria St.
Toronto, ON, M5B2K3 Canada
- Dept. Electrical and Computer Engineering, University
of Toronto, 27 King's College Circle, Toronto, Ontario, M5S 1A1,
Canada
- Dept. of Medical Imaging, St. Michael’s
Hospital, 30 Bond Street, Toronto, ON, M5B 1W8, Canada
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27
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Liu X, Iordachita II, He X, Taylor RH, Kang JU. Miniature fiber-optic force sensor based on low-coherence Fabry-Pérot interferometry for vitreoretinal microsurgery. Biomed Opt Express 2012; 3:1062-76. [PMID: 22567596 PMCID: PMC3342182 DOI: 10.1364/boe.3.001062] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 04/16/2012] [Accepted: 04/16/2012] [Indexed: 05/20/2023]
Abstract
During vitreoretinal surgery, the surgeon manipulates retinal tissue with tool-to-tissue interaction forces below the human sensory threshold. A force sensor (FS) integrated with conventional surgical tools may significantly improve the surgery outcome by providing tactile feedback to the surgeon. We designed and built a surgical tool integrated with a miniature FS with an outer diameter smaller than 1 mm for vitreoretinal surgery based on low-coherence Fabry-Pérot (FP) interferometry. The force sensing elements are located at the tool tip which is in direct contact with tissue during surgery and the FP cavity length is interrogated by a fiber-optic common-path phase-sensitive optical coherence tomography (OCT) system. We have calibrated the FS's response to axial and lateral forces and conducted experiments to verify that our FS can simultaneously measure both axial and lateral force components.
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Affiliation(s)
- Xuan Liu
- Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Iulian I. Iordachita
- Laboratory for Computational Sensing and Robotics, Center for Computer-Integrated Surgical Systems and Technology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Xingchi He
- Department of Mechanical Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA
| | - Russell H. Taylor
- Laboratory for Computational Sensing and Robotics, Center for Computer-Integrated Surgical Systems and Technology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Jin U. Kang
- Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
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Rinehart M, Zhu Y, Wax A. Quantitative phase spectroscopy. Biomed Opt Express 2012; 3:958-65. [PMID: 22567588 PMCID: PMC3342200 DOI: 10.1364/boe.3.000958] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 04/05/2012] [Accepted: 04/10/2012] [Indexed: 05/18/2023]
Abstract
Quantitative phase spectroscopy is presented as a novel method of measuring the wavelength-dependent refractive index of microscopic volumes. Light from a broadband source is filtered to an ~5 nm bandwidth and rapidly tuned across the visible spectrum in 1 nm increments by an acousto-optic tunable filter (AOTF). Quantitative phase images of semitransparent samples are recovered at each wavelength using off-axis interferometry and are processed to recover relative and absolute dispersion measurements. We demonstrate the utility of this approach by (i) spectrally averaging phase images to reduce coherent noise, (ii) measuring absorptive and dispersive features in microspheres, and (iii) quantifying bulk hemoglobin concentrations by absolute refractive index measurements. Considerations of using low coherence illumination and the extension of spectral techniques in quantitative phase measurements are discussed.
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Galeano Z JA, Sandoz P, Gaiffe E, Launay S, Robert L, Jacquot M, Hirchaud F, Prétet JL, Mougin C. Position-referenced microscopy for live cell culture monitoring. Biomed Opt Express 2011; 2:1307-18. [PMID: 21559142 PMCID: PMC3087587 DOI: 10.1364/boe.2.001307] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Revised: 04/13/2011] [Accepted: 04/14/2011] [Indexed: 05/11/2023]
Abstract
Position-referenced microscopy (PRM) is based on smart sample holders that integrate a position reference pattern (PRP) in their depth, allowing the determination of the lateral coordinates with respect to the sample-holder itself. Regions of interest can thus be retrieved easily after culture dish transfers from a cell incubator to the microscope stage. Images recorded at different instants in time are superimposed in a common coordinate system with subpixel accuracy. This paper presents such smart Petri culture dishes and their use for live cell culture monitoring. The impact of the PRP on the light budget is discussed and performances are demonstrated. First results on the application of PRM to the observation of apoptotic body internalization are reported.
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Kuranov RV, Qiu J, McElroy AB, Estrada A, Salvaggio A, Kiel J, Dunn AK, Duong TQ, Milner TE. Depth-resolved blood oxygen saturation measurement by dual-wavelength photothermal (DWP) optical coherence tomography. Biomed Opt Express 2011; 2:491-504. [PMID: 21412455 PMCID: PMC3047355 DOI: 10.1364/boe.2.000491] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 01/24/2011] [Accepted: 01/29/2011] [Indexed: 05/03/2023]
Abstract
Non-invasive depth-resolved measurement of hemoglobin oxygen saturation (SaO(2)) levels in discrete blood vessels may have implications for diagnosis and treatment of various pathologies. We introduce a novel Dual-Wavelength Photothermal (DWP) Optical Coherence Tomography (OCT) for non-invasive depth-resolved measurement of SaO(2) levels in a blood vessel phantom. DWP OCT SaO(2) is linearly correlated with blood-gas SaO(2) measurements. We demonstrate 6.3% precision in SaO(2) levels measured a phantom blood vessel using DWP-OCT with 800 and 765 nm excitation wavelengths. Sources of uncertainty in SaO(2) levels measured with DWP-OCT are identified and characterized.
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Affiliation(s)
- Roman V. Kuranov
- Department of Ophthalmology, The University of Texas Health Science Center, San Antonio, Texas 78229, USA
- Dept. of Biomedical Engineering, The University of Texas at Austin, Texas 78712, USA
| | - Jinze Qiu
- Dept. of Biomedical Engineering, The University of Texas at Austin, Texas 78712, USA
| | - Austin B. McElroy
- Dept. of Biomedical Engineering, The University of Texas at Austin, Texas 78712, USA
| | - Arnold Estrada
- Dept. of Biomedical Engineering, The University of Texas at Austin, Texas 78712, USA
| | - Anthony Salvaggio
- Dept. of Biomedical Engineering, The University of Texas at Austin, Texas 78712, USA
| | - Jeffrey Kiel
- Department of Ophthalmology, The University of Texas Health Science Center, San Antonio, Texas 78229, USA
| | - Andrew K. Dunn
- Dept. of Biomedical Engineering, The University of Texas at Austin, Texas 78712, USA
| | - Timothy Q. Duong
- Department of Ophthalmology, The University of Texas Health Science Center, San Antonio, Texas 78229, USA
- South Texas Veterans Health Care System, San Antonio, Texas 78229, USA
| | - Thomas E. Milner
- Dept. of Biomedical Engineering, The University of Texas at Austin, Texas 78712, USA
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