101
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Malandrino A, Kamm RD, Moeendarbary E. In Vitro Modeling of Mechanics in Cancer Metastasis. ACS Biomater Sci Eng 2018; 4:294-301. [PMID: 29457129 PMCID: PMC5811931 DOI: 10.1021/acsbiomaterials.7b00041] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 05/16/2017] [Indexed: 02/06/2023]
Abstract
In addition to a multitude of genetic and biochemical alterations, abnormal morphological, structural, and mechanical changes in cells and their extracellular environment are key features of tumor invasion and metastasis. Furthermore, it is now evident that mechanical cues alongside biochemical signals contribute to critical steps of cancer initiation, progression, and spread. Despite its importance, it is very challenging to study mechanics of different steps of metastasis in the clinic or even in animal models. While considerable progress has been made in developing advanced in vitro models for studying genetic and biological aspects of cancer, less attention has been paid to models that can capture both biological and mechanical factors realistically. This is mainly due to lack of appropriate models and measurement tools. After introducing the central role of mechanics in cancer metastasis, we provide an outlook on the emergence of novel in vitro assays and their combination with advanced measurement technologies to probe and recapitulate mechanics in conditions more relevant to the metastatic disease.
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Affiliation(s)
- Andrea Malandrino
- Department of Mechanical Engineering and Department of Biological
Engineering, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
- Institute
for Bioengineering of Catalonia, Barcelona 08028, Spain
| | - Roger D. Kamm
- Department of Mechanical Engineering and Department of Biological
Engineering, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
| | - Emad Moeendarbary
- Department of Mechanical Engineering and Department of Biological
Engineering, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
- Department
of Mechanical Engineering, University College
London, London WC1E 6BT, United Kingdom
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102
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Wijesinghe P, Johansen NJ, Curatolo A, Sampson DD, Ganss R, Kennedy BF. Ultrahigh-Resolution Optical Coherence Elastography Images Cellular-Scale Stiffness of Mouse Aorta. Biophys J 2018; 113:2540-2551. [PMID: 29212007 DOI: 10.1016/j.bpj.2017.09.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 08/22/2017] [Accepted: 09/19/2017] [Indexed: 01/08/2023] Open
Abstract
Cellular-scale imaging of the mechanical properties of tissue has helped to reveal the origins of disease; however, cellular-scale resolution is not readily achievable in intact tissue volumes. Here, we demonstrate volumetric imaging of Young's modulus using ultrahigh-resolution optical coherence elastography, and apply it to characterizing the stiffness of mouse aortas. We achieve isotropic resolution of better than 15 μm over a 1-mm lateral field of view through the entire depth of an intact aortic wall. We employ a method of quasi-static compression elastography that measures volumetric axial strain and uses a compliant, transparent layer to measure surface axial stress. This combination is used to estimate Young's modulus throughout the volume. We demonstrate differentiation by stiffness of individual elastic lamellae and vascular smooth muscle. We observe stiffening of the aorta in regulator of G protein signaling 5-deficient mice, a model that is linked to vascular remodeling and fibrosis. We observe increased stiffness with proximity to the heart, as well as regions with micro-structural and micro-mechanical signatures characteristic of fibrous and lipid-rich tissue. High-resolution imaging of Young's modulus with optical coherence elastography may become an important tool in vascular biology and in other fields concerned with understanding the role of mechanics within the complex three-dimensional architecture of tissue.
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Affiliation(s)
- Philip Wijesinghe
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia, Australia; Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic and Computer Engineering, The University of Western Australia, Perth, Western Australia, Australia.
| | - Niloufer J Johansen
- Centre for Medical Research, The University of Western Australia, Perth, Western Australia, Australia; Research Department, St John of God Subiaco Hospital, Subiaco, Western Australia, Australia
| | - Andrea Curatolo
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia, Australia; School of Electrical, Electronic and Computer Engineering, The University of Western Australia, Perth, Western Australia, Australia
| | - David D Sampson
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic and Computer Engineering, The University of Western Australia, Perth, Western Australia, Australia; Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Ruth Ganss
- Vascular Biology and Stromal Targeting, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia, Australia
| | - Brendan F Kennedy
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia, Australia; School of Electrical, Electronic and Computer Engineering, The University of Western Australia, Perth, Western Australia, Australia
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103
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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: 117] [Impact Index Per Article: 16.7] [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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104
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Beswick DM, Kaushik A, Beinart D, McGarry S, Yew MK, Kennedy BF, Maria PLS. Biomedical device innovation methodology: applications in biophotonics. JOURNAL OF BIOMEDICAL OPTICS 2017; 23:1-7. [PMID: 29243414 DOI: 10.1117/1.jbo.23.2.021102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 11/15/2017] [Indexed: 05/03/2023]
Abstract
The process of medical device innovation involves an iterative method that focuses on designing innovative, device-oriented solutions that address unmet clinical needs. This process has been applied to the field of biophotonics with many notable successes. Device innovation begins with identifying an unmet clinical need and evaluating this need through a variety of lenses, including currently existing solutions for the need, stakeholders who are interested in the need, and the market that will support an innovative solution. Only once the clinical need is understood in detail can the invention process begin. The ideation phase often involves multiple levels of brainstorming and prototyping with the aim of addressing technical and clinical questions early and in a cost-efficient manner. Once potential solutions are found, they are tested against a number of known translational factors, including intellectual property, regulatory, and reimbursement landscapes. Only when the solution matches the clinical need, the next phase of building a "to market" strategy should begin. Most aspects of the innovation process can be conducted relatively quickly and without significant capital expense. This white paper focuses on key points of the medical device innovation method and how the field of biophotonics has been applied within this framework to generate clinical and commercial success.
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Affiliation(s)
- Daniel M Beswick
- Stanford University, Department of Otolaryngology, Head and Neck Surgery, Stanford, California, United States
- Oregon Health and Science University, Department of Otolaryngology, Head and Neck Surgery, Portland,, United States
| | - Arjun Kaushik
- SPARK Co-Lab, Perth, Western Australia, Australia
- Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
| | - Dylan Beinart
- SPARK Co-Lab, Perth, Western Australia, Australia
- Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
| | - Sarah McGarry
- SPARK Co-Lab, Perth, Western Australia, Australia
- Curtin University, School of Occupational Therapy and Social Work, Faculty of Health Sciences, Bentl, Australia
| | - Ming Khoon Yew
- SPARK Co-Lab, Perth, Western Australia, Australia
- Royal Perth Hospital, Department of General Surgery, Perth, Western Australia, Australia
| | - Brendan F Kennedy
- QEII Medical Centre, Harry Perkins Institute of Medical Research, BRITElab, Nedlands, Western Austra, Australia
- University of Western Australia, Centre for Medical Research, Perth, Western Australia, Australia
- University of Western Australia, School of Electrical, Electronic and Computer Engineering, Perth, W, Australia
| | - Peter Luke Santa Maria
- Stanford University, Department of Otolaryngology, Head and Neck Surgery, Stanford, California, United States
- SPARK Co-Lab, Perth, Western Australia, Australia
- University of Western Australia, Department of Ear Sciences, Perth, Western Australia, Australia
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105
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Monroy GL, Won J, Spillman DR, Dsouza R, Boppart SA. Clinical translation of handheld optical coherence tomography: practical considerations and recent advancements. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-30. [PMID: 29260539 PMCID: PMC5735247 DOI: 10.1117/1.jbo.22.12.121715] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 12/04/2017] [Indexed: 05/21/2023]
Abstract
Since the inception of optical coherence tomography (OCT), advancements in imaging system design and handheld probes have allowed for numerous advancements in disease diagnostics and characterization of the structural and optical properties of tissue. OCT system developers continue to reduce form factor and cost, while improving imaging performance (speed, resolution, etc.) and flexibility for applicability in a broad range of fields, and nearly every clinical specialty. An extensive array of components to construct customized systems has also become available, with a range of commercial entities that produce high-quality products, from single components to full systems, for clinical and research use. Many advancements in the development of these miniaturized and portable systems can be linked back to a specific challenge in academic research, or a clinical need in medicine or surgery. Handheld OCT systems are discussed and explored for various applications. Handheld systems are discussed in terms of their relative level of portability and form factor, with mention of the supporting technologies and surrounding ecosystem that bolstered their development. Additional insight from our efforts to implement systems in several clinical environments is provided. The trend toward well-designed, efficient, and compact handheld systems paves the way for more widespread adoption of OCT into point-of-care or point-of-procedure applications in both clinical and commercial settings.
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Affiliation(s)
- Guillermo L. Monroy
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana-Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Jungeun Won
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana-Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Darold R. Spillman
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Roshan Dsouza
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Stephen A. Boppart
- Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana-Champaign, Department of Bioengineering, Urbana, Illinois, United States
- University of Illinois at Urbana-Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois, United States
- Carle-Illinois College of Medicine, Urbana, Illinois, United States
- Address all correspondence to: Stephen A. Boppart, E-mail:
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106
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Tsai TH, Leggett CL, Trindade AJ, Sethi A, Swager AF, Joshi V, Bergman JJ, Mashimo H, Nishioka NS, Namati E. Optical coherence tomography in gastroenterology: a review and future outlook. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-17. [PMID: 29260538 DOI: 10.1117/1.jbo.22.12.121716] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 12/05/2017] [Indexed: 05/18/2023]
Abstract
Optical coherence tomography (OCT) is an imaging technique optically analogous to ultrasound that can generate depth-resolved images with micrometer-scale resolution. Advances in fiber optics and miniaturized actuation technologies allow OCT imaging of the human body and further expand OCT utilization in applications including but not limited to cardiology and gastroenterology. This review article provides an overview of current OCT development and its clinical utility in the gastrointestinal tract, including disease detection/differentiation and endoscopic therapy guidance, as well as a discussion of its future applications.
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Affiliation(s)
- Tsung-Han Tsai
- NinePoint Medical, Inc., Bedford, Massachusetts, United States
| | - Cadman L Leggett
- Mayo Clinics, Division of Gastroenterology and Hepatology, Rochester, Minnesota, United States
| | - Arvind J Trindade
- North Shore University Hospital and Hofstra Northwell School of Medicine, Division of Gastroenterolo, United States
| | - Amrita Sethi
- Columbia University Medical Center, Department of Gastroenterology, New York City, New York, United States
| | - Anne-Fré Swager
- Spaarne Gasthuis and Free University Medical Center, Amsterdam, The Netherlands
| | - Virendra Joshi
- Ochsner Clinic Foundation, Department of Gastroenterology, New Orleans, Louisiana, United States
| | - Jacques J Bergman
- Academic Medical Center, Department of Gastroenterology and Hepatology, Amsterdam, The Netherlands
| | - Hiroshi Mashimo
- Veterans Affairs Boston Healthcare System and Harvard Medical School, Department of Gastroenterology, United States
| | - Norman S Nishioka
- Massachusetts General Hospital, Gastrointestinal Unit, Boston, Massachusetts, United States
| | - Eman Namati
- NinePoint Medical, Inc., Bedford, Massachusetts, United States
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107
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Bennett A, Sirkis T, Beiderman Y, Agdarov S, Beiderman Y, Zalevsky Z. Approach to breast cancer early detection via tracking of secondary speckle patterns reflected from the skin with artificial intradermal impurity. BIOMEDICAL OPTICS EXPRESS 2017; 8:5359-5367. [PMID: 29296472 PMCID: PMC5745087 DOI: 10.1364/boe.8.005359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/26/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
Breast cancer has become a major cause of death among women. The lifetime risk of a woman developing this disease has been established as one in eight. The most useful way to reduce breast cancer death is to treat the disease as early as possible. The existing methods of early diagnostics of breast cancer are mainly based on screening mammography or Magnetic Resonance Imaging (MRI) periodically conducted at medical facilities. In this paper the authors proposing a new approach for simple breast cancer detection. It is based on skin stimulation by sound waves, illuminating it by laser beam and tracking the reflected secondary speckle patterns. As first approach, plastic balls of different sizes were placed under the skin of chicken breast and detected by the proposed method.
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108
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Boppart SA, Brown JQ, Farah CS, Kho E, Marcu L, Saunders CM, Sterenborg HJCM. Label-free optical imaging technologies for rapid translation and use during intraoperative surgical and tumor margin assessment. JOURNAL OF BIOMEDICAL OPTICS 2017; 23:1-10. [PMID: 29288572 PMCID: PMC5747261 DOI: 10.1117/1.jbo.23.2.021104] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 11/28/2017] [Indexed: 05/18/2023]
Abstract
The biannual International Conference on Biophotonics was recently held on April 30 to May 1, 2017, in Fremantle, Western Australia. This continuing conference series brought together key opinion leaders in biophotonics to present their latest results and, importantly, to participate in discussions on the future of the field and what opportunities exist when we collectively work together for using biophotonics for biological discovery and medical applications. One session in this conference, entitled "Tumor Margin Identification: Critiquing Technologies," challenged invited speakers and attendees to review and critique representative label-free optical imaging technologies and their application for intraoperative assessment and guidance in surgical oncology. We are pleased to share a summary in this outlook paper, with the intent to motivate more research inquiry and investigations, to challenge these and other optical imaging modalities to evaluate and improve performance, to spur translation and adoption, and ultimately, to improve the care and outcomes of patients.
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Affiliation(s)
- Stephen A. Boppart
- University of Illinois at Urbana-Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- Address all correspondence to: Stephen A. Boppart, E-mail:
| | - J. Quincy Brown
- Tulane University, Department of Biomedical Engineering, New Orleans, Louisiana, United States
| | - Camile S. Farah
- University of Western Australia, UWA Dental School, Oral Health Centre of Western Australia, Discipline of Oral Oncology, Nedlands, Western Australia, Australia
| | - Esther Kho
- Netherlands Cancer Institute, Department of Surgery, Amsterdam, The Netherlands
| | - Laura Marcu
- University of California–Davis, Department of Biomedical Engineering, Comprehensive Cancer Center, Davis, California, United States
| | - Christobel M. Saunders
- The University of Western Australia, Department of Surgical Oncology, Crawley, Western Australia, Australia
| | - Henricus J. C. M. Sterenborg
- Netherlands Cancer Institute, Department of Surgery, Amsterdam, The Netherlands
- Academic Medical Center, Department of Biomedical Engineering and Physics, Amsterdam, The Netherlands
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109
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Zaitsev VY, Matveyev AL, Matveev LA, Gelikonov GV, Omelchenko AI, Baum OI, Avetisov SE, Bolshunov AV, Siplivy VI, Shabanov DV, Vitkin A, Sobol EN. Optical coherence elastography for strain dynamics measurements in laser correction of cornea shape. JOURNAL OF BIOPHOTONICS 2017; 10:1450-1463. [PMID: 28493426 DOI: 10.1002/jbio.201600291] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 03/24/2017] [Accepted: 04/23/2017] [Indexed: 05/20/2023]
Abstract
We describe the use of elastographic processing in phase-sensitive optical coherence tomography (OCT) for visualizing dynamics of strain and tissue-shape changes during laser-induced photothermal corneal reshaping, for applications in the emerging field of non-destructive and non-ablative (non-LASIK) laser vision correction. The proposed phase-processing approach based on fairly sparse data acquisition enabled rapid data processing and near-real-time visualization of dynamic strains. The approach avoids conventional phase unwrapping, yet allows for mapping strains even for significantly supra-wavelength inter-frame displacements of scatterers accompanied by multiple phase-wrapping. These developments bode well for real-time feedback systems for controlling the dynamics of corneal deformation with 10-100 ms temporal resolution, and for suitably long-term monitoring of resultant reshaping of the cornea. In ex-vivo experiments with excised rabbit eyes, we demonstrate temporal plastification of cornea that allows shape changes relevant for vision-correction applications without affecting its transparency. We demonstrate OCT's ability to detect achieving of threshold temperatures required for tissue plastification and simultaneously characterize transient and cumulative strain distributions, surface displacements, and scattering tissue properties. Comparison with previously used methods for studying laser-induced reshaping of cartilaginous tissues and numerical simulations is performed.
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Affiliation(s)
- Vladimir Y Zaitsev
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Alexander L Matveyev
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Lev A Matveev
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Grigory V Gelikonov
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Alexander I Omelchenko
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
- Institute of Photonic Technologies, Centre "Crystallography and Photonics", Russian Academy of Sciences, Moscow, Russia
| | - Olga I Baum
- Institute of Photonic Technologies, Centre "Crystallography and Photonics", Russian Academy of Sciences, Moscow, Russia
| | | | | | | | - Dmitry V Shabanov
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Alex Vitkin
- University Health Network and University of Toronto, 101 College street, Toronto, Ontario, M5G 1 L7, Canada
| | - Emil N Sobol
- Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
- Institute of Photonic Technologies, Centre "Crystallography and Photonics", Russian Academy of Sciences, Moscow, Russia
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110
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Fang Q, Curatolo A, Wijesinghe P, Yeow YL, Hamzah J, Noble PB, Karnowski K, Sampson DD, Ganss R, Kim JK, Lee WM, Kennedy BF. Ultrahigh-resolution optical coherence elastography through a micro-endoscope: towards in vivo imaging of cellular-scale mechanics. BIOMEDICAL OPTICS EXPRESS 2017; 8:5127-5138. [PMID: 29188108 PMCID: PMC5695958 DOI: 10.1364/boe.8.005127] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/24/2017] [Accepted: 10/01/2017] [Indexed: 05/18/2023]
Abstract
In this paper, we describe a technique capable of visualizing mechanical properties at the cellular scale deep in living tissue, by incorporating a gradient-index (GRIN)-lens micro-endoscope into an ultrahigh-resolution optical coherence elastography system. The optical system, after the endoscope, has a lateral resolution of 1.6 µm and an axial resolution of 2.2 µm. Bessel beam illumination and Gaussian mode detection are used to provide an extended depth-of-field of 80 µm, which is a 4-fold improvement over a fully Gaussian beam case with the same lateral resolution. Using this system, we demonstrate quantitative elasticity imaging of a soft silicone phantom containing a stiff inclusion and a freshly excised malignant murine pancreatic tumor. We also demonstrate qualitative strain imaging below the tissue surface on in situ murine muscle. The approach we introduce here can provide high-quality extended-focus images through a micro-endoscope with potential to measure cellular-scale mechanics deep in tissue. We believe this tool is promising for studying biological processes and disease progression in vivo.
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Affiliation(s)
- Qi Fang
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia 6009,
Australia
- School of Electrical, Electronic & Computer Engineering, The University of Western Australia, Perth, Western Australia 6009,
Australia
| | - Andrea Curatolo
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia 6009,
Australia
- School of Electrical, Electronic & Computer Engineering, The University of Western Australia, Perth, Western Australia 6009,
Australia
| | - Philip Wijesinghe
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia 6009,
Australia
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, Perth, Western Australia 6009,
Australia
| | - Yen Ling Yeow
- Targeted Drug Delivery, Imaging and Therapy, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia 6009,
Australia
| | - Juliana Hamzah
- Targeted Drug Delivery, Imaging and Therapy, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia 6009,
Australia
| | - Peter B. Noble
- School of Human Sciences, The University of Western Australia, Perth, Western Australia 6009,
Australia
- Centre for Neonatal Research & Education, School of Paediatrics and Child Health, The University of Western Australia, Perth, Western Australia 6009,
Australia
| | - Karol Karnowski
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, Perth, Western Australia 6009,
Australia
| | - David D. Sampson
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, Perth, Western Australia 6009,
Australia
- Centre for Microscopy, Characterisation & Analysis, The University of Western Australia, Perth, Western Australia 6009,
Australia
| | - Ruth Ganss
- Vascular Biology and Stromal Targeting, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia 6009,
Australia
| | - Jun Ki Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, and University of Ulsan College of Medicine, Seoul, 138-736,
South Korea
| | - Woei M. Lee
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra ACT 0200,
Australia
- The ARC Centre of Excellence in Advanced Molecular Imaging, The Australian National University, ACT 2601,
Australia
| | - Brendan F. Kennedy
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, Western Australia 6009,
Australia
- School of Electrical, Electronic & Computer Engineering, The University of Western Australia, Perth, Western Australia 6009,
Australia
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111
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Song S, Xu J, Men S, Shen TT, Wang RK. Robust numerical phase stabilization for long-range swept-source optical coherence tomography. JOURNAL OF BIOPHOTONICS 2017; 10:1398-1410. [PMID: 28485132 PMCID: PMC5831409 DOI: 10.1002/jbio.201700034] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 03/28/2017] [Accepted: 04/03/2017] [Indexed: 05/03/2023]
Abstract
A novel phase stabilization technique is demonstrated with significant improvement in the phase stability of a micro-electromechanical (MEMS) vertical cavity surface-emitting laser (VCSEL) based swept-source optical coherence tomography (SS-OCT) system. Without any requirements of hardware modifications, the new fully numerical phase stabilization technique features high tolerance to acquisition jitter, and significantly reduced budget in computational effort. We demonstrate that when measured with biological tissue, this technique enables a phase sensitivity of 89 mrad in highly scattering tissue, with image ranging distance of up to 12.5 mm at A-line scan rate of 100.3 kHz. We further compare the performances delivered by the phase-stabilization approach with conventional numerical approach for accuracy and computational efficiency. Imaging result of complex signal-based optical coherence tomography angiography (OCTA) and Doppler OCTA indicate that the proposed phase stabilization technique is robust, and efficient in improving the image contrast-to-noise ratio and extending OCTA depth range. The proposed technique can be universally applied to improve phase-stability in generic SS-OCT with different scale of scan rates without a need for special treatment.
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Affiliation(s)
- Shaozhen Song
- University of Washington, Department of Bioengineering, Seattle, WA 98195, USA
| | - Jingjiang Xu
- University of Washington, Department of Bioengineering, Seattle, WA 98195, USA
| | - Shaojie Men
- University of Washington, Department of Bioengineering, Seattle, WA 98195, USA
| | - Tueng T Shen
- University of Washington, Department of Bioengineering, Seattle, WA 98195, USA
- University of Washington, Department of Ophthalmology, Seattle, WA 98195, USA
| | - Ruikang K Wang
- University of Washington, Department of Bioengineering, Seattle, WA 98195, USA
- University of Washington, Department of Ophthalmology, Seattle, WA 98195, USA
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112
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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. BIOMEDICAL OPTICS 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] [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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113
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Stem cell migration and mechanotransduction on linear stiffness gradient hydrogels. Proc Natl Acad Sci U S A 2017; 114:5647-5652. [PMID: 28507138 DOI: 10.1073/pnas.1618239114] [Citation(s) in RCA: 303] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The spatial presentation of mechanical information is a key parameter for cell behavior. We have developed a method of polymerization control in which the differential diffusion distance of unreacted cross-linker and monomer into a prepolymerized hydrogel sink results in a tunable stiffness gradient at the cell-matrix interface. This simple, low-cost, robust method was used to produce polyacrylamide hydrogels with stiffness gradients of 0.5, 1.7, 2.9, 4.5, 6.8, and 8.2 kPa/mm, spanning the in vivo physiological and pathological mechanical landscape. Importantly, three of these gradients were found to be nondurotactic for human adipose-derived stem cells (hASCs), allowing the presentation of a continuous range of stiffnesses in a single well without the confounding effect of differential cell migration. Using these nondurotactic gradient gels, stiffness-dependent hASC morphology, migration, and differentiation were studied. Finally, the mechanosensitive proteins YAP, Lamin A/C, Lamin B, MRTF-A, and MRTF-B were analyzed on these gradients, providing higher-resolution data on stiffness-dependent expression and localization.
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114
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Optical coherence tomography-based contact indentation for diaphragm mechanics in a mouse model of transforming growth factor alpha induced lung disease. Sci Rep 2017; 7:1517. [PMID: 28473708 PMCID: PMC5431417 DOI: 10.1038/s41598-017-01431-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 03/30/2017] [Indexed: 01/25/2023] Open
Abstract
This study tested the utility of optical coherence tomography (OCT)-based indentation to assess mechanical properties of respiratory tissues in disease. Using OCT-based indentation, the elastic modulus of mouse diaphragm was measured from changes in diaphragm thickness in response to an applied force provided by an indenter. We used a transgenic mouse model of chronic lung disease induced by the overexpression of transforming growth factor-alpha (TGF-α), established by the presence of pleural and peribronchial fibrosis and impaired lung mechanics determined by the forced oscillation technique and plethysmography. Diaphragm elastic modulus assessed by OCT-based indentation was reduced by TGF-α at both left and right lateral locations (p < 0.05). Diaphragm elastic modulus at left and right lateral locations were correlated within mice (r = 0.67, p < 0.01) suggesting that measurements were representative of tissue beyond the indenter field. Co-localised images of diaphragm after TGF-α overexpression revealed a layered fibrotic appearance. Maximum diaphragm force in conventional organ bath studies was also reduced by TGF-α overexpression (p < 0.01). Results show that OCT-based indentation provided clear delineation of diseased diaphragm, and together with organ bath assessment, provides new evidence suggesting that TGF-α overexpression produces impairment in diaphragm function and, therefore, an increase in the work of breathing in chronic lung disease.
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115
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Chin L, Latham B, Saunders CM, Sampson DD, Kennedy BF. Simplifying the assessment of human breast cancer by mapping a micro-scale heterogeneity index in optical coherence elastography. JOURNAL OF BIOPHOTONICS 2017; 10:690-700. [PMID: 27618159 DOI: 10.1002/jbio.201600092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 07/08/2016] [Accepted: 08/13/2016] [Indexed: 05/02/2023]
Abstract
Surgical treatment of breast cancer aims to identify and remove all malignant tissue. Intraoperative assessment of tumor margins is, however, not exact; thus, re-excision is frequently needed, or excess normal tissue is removed. Imaging methods applicable intraoperatively could help to reduce re-excision rates whilst minimizing removal of excess healthy tissue. Optical coherence elastography (OCE) has been proposed for use in breast-conserving surgery; however, intraoperative interpretation of complex OCE images may prove challenging. Observations of breast cancer on multiple length scales, by OCE, ultrasound elastography, and atomic force microscopy, have shown an increase in the mechanical heterogeneity of malignant breast tumors compared to normal breast tissue. In this study, a micro-scale mechanical heterogeneity index is introduced and used to form heterogeneity maps from OCE scans of 10 ex vivo human breast tissue samples. Through comparison of OCE, optical coherence tomography images, and corresponding histology, malignant tissue is shown to possess a higher heterogeneity index than benign tissue. The heterogeneity map simplifies the contrast between tumor and normal stroma in breast tissue, facilitating the rapid identification of possible areas of malignancy, which is an important step towards intraoperative margin assessment using OCE.
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Affiliation(s)
- Lixin Chin
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun St, Nedlands, Perth, WA 6009, Australia
| | - Bruce Latham
- PathWest, Fiona Stanley Hospital, Robin Warren Drive, Murdoch, WA 6150, Australia
| | - Christobel M Saunders
- School of Surgery, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- Breast Clinic, Royal Perth Hospital, 197 Wellington Street, Perth, WA 6000, Australia
| | - David D Sampson
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- Centre for Microscopy, Characterisation & Analysis, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Brendan F Kennedy
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun St, Nedlands, Perth, WA 6009, Australia
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116
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Es’haghian S, Kennedy KM, Gong P, Li Q, Chin L, Wijesinghe P, Sampson DD, McLaughlin RA, Kennedy BF. In vivo volumetric quantitative micro-elastography of human skin. BIOMEDICAL OPTICS EXPRESS 2017; 8:2458-2471. [PMID: 28663884 PMCID: PMC5480491 DOI: 10.1364/boe.8.002458] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 03/23/2017] [Accepted: 03/24/2017] [Indexed: 05/17/2023]
Abstract
In this paper, we demonstrate in vivo volumetric quantitative micro-elastography of human skin. Elasticity is estimated at each point in the captured volume by combining local axial strain measured in the skin with local axial stress estimated at the skin surface. This is achieved by utilizing phase-sensitive detection to measure axial displacements resulting from compressive loading of the skin and an overlying, compliant, transparent layer with known stress/strain behavior. We use an imaging probe head that provides optical coherence tomography imaging and compression from the same direction. We demonstrate our technique on a tissue phantom containing a rigid inclusion, and present in vivo elastograms acquired from locations on the hand, wrist, forearm and leg of human volunteers.
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Affiliation(s)
- Shaghayegh Es’haghian
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Kelsey M. Kennedy
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun Street, Nedlands, WA 6009, Australia
| | - Peijun Gong
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Qingyun Li
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Lixin Chin
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun Street, Nedlands, WA 6009, Australia
- School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Philip Wijesinghe
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun Street, Nedlands, WA 6009, Australia
| | - David D. Sampson
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- Centre for Microscopy, Characterisation & Analysis, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Robert A. McLaughlin
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- Australian Research Council Centre of Excellence for Nanoscale Biophotonics, School of Medicine, Faculty of Health Sciences, University of Adelaide, Adelaide, South Australia, 5005, Australia
| | - Brendan F. Kennedy
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun Street, Nedlands, WA 6009, Australia
- School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
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117
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Multi-functional Ultrasonic Micro-elastography Imaging System. Sci Rep 2017; 7:1230. [PMID: 28450709 PMCID: PMC5430777 DOI: 10.1038/s41598-017-01210-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 03/28/2017] [Indexed: 12/13/2022] Open
Abstract
In clinical decision making, in addition to anatomical information, biomechanical properties of soft tissues may provide additional clues for disease diagnosis. Given the fact that most of diseases are originated from micron sized structures, an elastography imaging system of fine resolution (~100 µm) and deep penetration depth capable of providing both qualitative and quantitative measurements of biomechanical properties is desired. Here, we report a newly developed multi-functional ultrasonic micro-elastography imaging system in which acoustic radiation force impulse imaging (ARFI) and shear wave elasticity imaging (SWEI) are implemented. To accomplish this, the 4.5 MHz/40 MHz transducer were used as the excitation/detection source, respectively. The imaging system was tested with tissue-mimicking phantoms and an ex vivo chicken liver through 2D/3D imaging. The measured lateral/axial elastography resolution and field of view are 223.7 ± 20.1/109.8 ± 6.9 µm and 1.5 mm for ARFI, 543.6 ± 39.3/117.6 ± 8.7 µm and 2 mm for SWEI, respectively. These results demonstrate that the promising capability of this high resolution elastography imaging system for characterizing tissue biomechanical properties at microscale level and its translational potential into clinical practice.
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118
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Wijesinghe P, Sampson DD, Kennedy BF. Computational optical palpation: a finite-element approach to micro-scale tactile imaging using a compliant sensor. J R Soc Interface 2017; 14:20160878. [PMID: 28250098 PMCID: PMC5378127 DOI: 10.1098/rsif.2016.0878] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 02/02/2017] [Indexed: 12/11/2022] Open
Abstract
High-resolution tactile imaging, superior to the sense of touch, has potential for future biomedical applications such as robotic surgery. In this paper, we propose a tactile imaging method, termed computational optical palpation, based on measuring the change in thickness of a thin, compliant layer with optical coherence tomography and calculating tactile stress using finite-element analysis. We demonstrate our method on test targets and on freshly excised human breast fibroadenoma, demonstrating a resolution of up to 15-25 µm and a field of view of up to 7 mm. Our method is open source and readily adaptable to other imaging modalities, such as ultrasonography and confocal microscopy.
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Affiliation(s)
- Philip Wijesinghe
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic and Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, Western Australia 6009, Australia
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun Street, Nedlands, Western Australia 6009, Australia
| | - David D Sampson
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic and Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, Western Australia 6009, Australia
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, 35 Stirling Highway, Perth, Western Australia 6009, Australia
| | - Brendan F Kennedy
- School of Electrical, Electronic and Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, Western Australia 6009, Australia
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun Street, Nedlands, Western Australia 6009, Australia
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119
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Abeytunge S, Larson B, Peterson G, Morrow M, Rajadhyaksha M, Murray MP. Evaluation of breast tissue with confocal strip-mosaicking microscopy: a test approach emulating pathology-like examination. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:34002. [PMID: 28327961 PMCID: PMC5361391 DOI: 10.1117/1.jbo.22.3.034002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 02/27/2017] [Indexed: 05/23/2023]
Abstract
Confocal microscopy is an emerging technology for rapid imaging of freshly excised tissue without the need for frozen- or fixed-section processing. Initial studies have described imaging of breast tissue using fluorescence confocal microscopy with small regions of interest, typically 750 × 750 ?? ? m 2 . We present exploration with a microscope, termed confocal strip-mosaicking microscope (CSM microscope), which images an area of 2 × 2 ?? cm 2 of tissue with cellular-level resolution in 10 min of excision. Using the CSM microscope, we imaged 34 fresh, human, large breast tissue specimens from 18 patients, blindly analyzed by a board-certified pathologist and subsequently correlated with the corresponding standard fixed histopathology. Invasive tumors and benign tissue were clearly identified in CSM strip-mosaic images. Thirty specimens were concordant for image-to-histopathology correlation while four were discordant.
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Affiliation(s)
- Sanjee Abeytunge
- Memorial Sloan Kettering Cancer Center, Dermatology Service, New York, New York, United States
| | - Bjorg Larson
- Memorial Sloan Kettering Cancer Center, Dermatology Service, New York, New York, United States
- Drew University, Physics Department, Madison, New Jersey, United States
| | - Gary Peterson
- Memorial Sloan Kettering Cancer Center, Dermatology Service, New York, New York, United States
| | - Monica Morrow
- Memorial Sloan Kettering Cancer Center, Breast Service, New York, New York, United States
| | - Milind Rajadhyaksha
- Memorial Sloan Kettering Cancer Center, Dermatology Service, New York, New York, United States
| | - Melissa P. Murray
- Memorial Sloan Kettering Cancer Center, Breast Pathology, New York, New York, United States
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120
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Hasse K, Neylon J, Santhanam AP. Feasibility and quantitative analysis of a biomechanical model-guided lung elastography for radiotherapy. Biomed Phys Eng Express 2017. [DOI: 10.1088/2057-1976/aa5d1c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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121
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Liu CH, Schill A, Raghunathan R, Wu C, Singh M, Han Z, Nair A, Larin KV. Ultra-fast line-field low coherence holographic elastography using spatial phase shifting. BIOMEDICAL OPTICS EXPRESS 2017; 8:993-1004. [PMID: 28270998 PMCID: PMC5330560 DOI: 10.1364/boe.8.000993] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 01/16/2017] [Accepted: 01/16/2017] [Indexed: 05/02/2023]
Abstract
Optical coherence elastography (OCE) is an emerging technique for quantifying tissue biomechanical properties. Generally, OCE relies on point-by-point scanning. However, long acquisition times make point-by-point scanning unfeasible for clinical use. Here we demonstrate a noncontact single shot line-field low coherence holography system utilizing an automatic Hilbert transform analysis based on a spatial phase shifting technique. Spatio-temporal maps of elastic wave propagation were acquired with only one air-pulse excitation and used to quantify wave velocity and sample mechanical properties at a line rate of 200 kHz. Results obtained on phantoms were correlated with data from mechanical testing. Finally, the stiffness of porcine cornea at different intraocular pressures was also quantified in situ.
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Affiliation(s)
- Chih-Hao Liu
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
| | - Alexander Schill
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
| | - Raksha Raghunathan
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
| | - Chen Wu
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
| | - Manmohan Singh
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
| | - Zhaolong Han
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
| | - Achuth Nair
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
| | - Kirill V. Larin
- Department of Biomedical Engineering, University of Houston, 3605 Cullen Boulevard, Houston, Texas 77204, USA
- Interdisciplinary Laboratory of Biophotonics, Tomsk State University, Tomsk, Russia
- Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77584, USA
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122
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Larin KV, Sampson DD. Optical coherence elastography - OCT at work in tissue biomechanics [Invited]. BIOMEDICAL OPTICS EXPRESS 2017; 8:1172-1202. [PMID: 28271011 PMCID: PMC5330567 DOI: 10.1364/boe.8.001172] [Citation(s) in RCA: 221] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 01/18/2017] [Accepted: 01/19/2017] [Indexed: 05/18/2023]
Abstract
Optical coherence elastography (OCE), as the use of OCT to perform elastography has come to be known, began in 1998, around ten years after the rest of the field of elastography - the use of imaging to deduce mechanical properties of tissues. After a slow start, the maturation of OCT technology in the early to mid 2000s has underpinned a recent acceleration in the field. With more than 20 papers published in 2015, and more than 25 in 2016, OCE is growing fast, but still small compared to the companion fields of cell mechanics research methods, and medical elastography. In this review, we describe the early developments in OCE, and the factors that led to the current acceleration. Much of our attention is on the key recent advances, with a strong emphasis on future prospects, which are exceptionally bright.
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Affiliation(s)
- 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, 1 Baylor Plaza, Houston, Texas 77030, USA;
| | - David D Sampson
- Optical + Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia; Centre for Microscopy, Characterisation & Analysis, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia;
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123
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Elyas E, Grimwood A, Erler JT, Robinson SP, Cox TR, Woods D, Clowes P, De Luca R, Marinozzi F, Fromageau J, Bamber JC. Multi-Channel Optical Coherence Elastography Using Relative and Absolute Shear-Wave Time of Flight. PLoS One 2017; 12:e0169664. [PMID: 28107368 PMCID: PMC5249105 DOI: 10.1371/journal.pone.0169664] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 12/20/2016] [Indexed: 11/18/2022] Open
Abstract
Elastography, the imaging of elastic properties of soft tissues, is well developed for macroscopic clinical imaging of soft tissues and can provide useful information about various pathological processes which is complementary to that provided by the original modality. Scaling down of this technique should ply the field of cellular biology with valuable information with regard to elastic properties of cells and their environment. This paper evaluates the potential to develop such a tool by modifying a commercial optical coherence tomography (OCT) device to measure the speed of shear waves propagating in a three-dimensional (3D) medium. A needle, embedded in the gel, was excited to vibrate along its long axis and the displacement as a function of time and distance from the needle associated with the resulting shear waves was detected using four M-mode images acquired simultaneously using a commercial four-channel swept-source OCT system. Shear-wave time of arrival (TOA) was detected by tracking the axial OCT-speckle motion using cross-correlation methods. Shear-wave speed was then calculated from inter-channel differences of TOA for a single burst (the relative TOA method) and compared with the shear-wave speed determined from positional differences of TOA for a single channel over multiple bursts (the absolute TOA method). For homogeneous gels the relative method provided shear-wave speed with acceptable precision and accuracy when judged against the expected linear dependence of shear modulus on gelatine concentration (R2 = 0.95) and ultimate resolution capabilities limited by 184μm inter-channel distance. This overall approach shows promise for its eventual provision as a research tool in cancer cell biology. Further work is required to optimize parameters such as vibration frequency, burst length and amplitude, and to assess the lateral and axial resolutions of this type of device as well as to create 3D elastograms.
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Affiliation(s)
- Eli Elyas
- CRUK Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research, Sutton, Surrey, United Kingdom
- Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, Surrey, United Kingdom
| | - Alex Grimwood
- Department of Medical Physics, Royal Surrey County Hospital, Guildford, Surrey, United Kingdom
| | - Janine T. Erler
- Biotech Research & Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Simon P. Robinson
- CRUK Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research, Sutton, Surrey, United Kingdom
| | - Thomas R. Cox
- Biotech Research & Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Daniel Woods
- Michelson Diagnostics, 1 Grays Farm Production Village, Orpington, Kent, United Kingdom
| | - Peter Clowes
- Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, Surrey, United Kingdom
| | - Ramona De Luca
- CRUK Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research, Sutton, Surrey, United Kingdom
- Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, Surrey, United Kingdom
- Department of Mechanical and Aerospace Engineering, Sapienza University of Rome, Rome, Italy
| | - Franco Marinozzi
- Department of Mechanical and Aerospace Engineering, Sapienza University of Rome, Rome, Italy
| | - Jérémie Fromageau
- CRUK Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research, Sutton, Surrey, United Kingdom
- Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, Surrey, United Kingdom
| | - Jeffrey C. Bamber
- CRUK Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research, Sutton, Surrey, United Kingdom
- Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, Surrey, United Kingdom
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124
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Kennedy KM, Chin L, Wijesinghe P, McLaughlin RA, Latham B, Sampson DD, Saunders CM, Kennedy BF. Investigation of optical coherence micro-elastography as a method to visualize micro-architecture in human axillary lymph nodes. BMC Cancer 2016; 16:874. [PMID: 27829404 PMCID: PMC5103493 DOI: 10.1186/s12885-016-2911-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 10/27/2016] [Indexed: 01/21/2023] Open
Abstract
Background Evaluation of lymph node involvement is an important factor in detecting metastasis and deciding whether to perform axillary lymph node dissection (ALND) in breast cancer surgery. As ALND is associated with potentially severe long term morbidity, the accuracy of lymph node assessment is imperative in avoiding unnecessary ALND. The mechanical properties of malignant lymph nodes are often distinct from those of normal nodes. A method to image the micro-scale mechanical properties of lymph nodes could, thus, provide diagnostic information to aid in the assessment of lymph node involvement in metastatic cancer. In this study, we scan axillary lymph nodes, freshly excised from breast cancer patients, with optical coherence micro-elastography (OCME), a method of imaging micro-scale mechanical strain, to assess its potential for the intraoperative assessment of lymph node involvement. Methods Twenty-six fresh, unstained lymph nodes were imaged from 15 patients undergoing mastectomy or breast-conserving surgery with axillary clearance. Lymph node specimens were bisected to allow imaging of the internal face of each node. Co-located OCME and optical coherence tomography (OCT) scans were taken of each sample, and the results compared to standard post-operative hematoxylin-and-eosin-stained histology. Results The optical backscattering signal provided by OCT alone may not provide reliable differentiation by inspection between benign and malignant lymphoid tissue. Alternatively, OCME highlights local changes in tissue strain that correspond to malignancy and are distinct from strain patterns in benign lymphoid tissue. The mechanical contrast provided by OCME complements the optical contrast provided by OCT and aids in the differentiation of malignant tumor from uninvolved lymphoid tissue. Conclusion The combination of OCME and OCT images represents a promising method for the identification of malignant lymphoid tissue. This method shows potential to provide intraoperative assessment of lymph node involvement, thus, preventing unnecessary removal of uninvolved tissues and improving patient outcomes.
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Affiliation(s)
- Kelsey M Kennedy
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Lixin Chin
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia. .,BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun St, Nedlands, Perth, WA, 6009, Australia.
| | - Philip Wijesinghe
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia.,BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun St, Nedlands, Perth, WA, 6009, Australia
| | - Robert A McLaughlin
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia.,Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, School of Medicine, Faculty of Health Sciences, University of Adelaide, Adelaide, SA, 5005, Australia
| | - Bruce Latham
- PathWest, Fiona Stanley Hospital, Robin Warren Drive, Murdoch, WA, 6150, Australia
| | - David D Sampson
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia.,Centre for Microscopy, Characterisation & Analysis, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Christobel M Saunders
- School of Surgery, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia.,Breast Clinic, Royal Perth Hospital, 197 Wellington Street, Perth, WA, 6000, Australia
| | - Brendan F Kennedy
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia.,BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun St, Nedlands, Perth, WA, 6009, Australia
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125
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Zaitsev VY, Matveyev AL, Matveev LA, Gelikonov GV, Sovetsky AA, Vitkin A. Optimized phase gradient measurements and phase-amplitude interplay in optical coherence elastography. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:116005. [PMID: 27824215 DOI: 10.1117/1.jbo.21.11.116005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 10/18/2016] [Indexed: 05/23/2023]
Abstract
In compressional optical coherence elastography, phase-variation gradients are used for estimating quasistatic strains created in tissue. Using reference and deformed optical coherence tomography (OCT) scans, one typically compares phases from pixels with the same coordinates in both scans. Usually, this limits the allowable strains to fairly small values <10?4 to 10?3, with the caveat that such weak phase gradients may become corrupted by stronger measurement noises. Here, we extend the OCT phase-resolved elastographic methodology by (1) showing that an order of magnitude greater strains can significantly increase the accuracy of derived phase-gradient differences, while also avoiding error-phone phase-unwrapping procedures and minimizing the influence of decorrelation noise caused by suprapixel displacements, (2) discussing the appearance of artifactual stiff inclusions in resultant OCT elastograms in the vicinity of bright scatterers due to the amplitude-phase interplay in phase-variation measurements, and (3) deriving/evaluating methods of phase-gradient estimation that can outperform conventionally used least-square gradient fitting. We present analytical arguments, numerical simulations, and experimental examples to demonstrate the advantages of the proposed optimized phase-variation methodology.
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Affiliation(s)
- Vladimir Y Zaitsev
- Institute of Applied Physics, Russian Academy of Sciences, 46 Uljanova Street, Nizhny Novgorod 603950, RussiabMedical Academy of Nizhny Novgorod, 1 Minina Square, 10/1 Minina Square, Nizhny Novgorod 603005, Russia
| | - Alexander L Matveyev
- Institute of Applied Physics, Russian Academy of Sciences, 46 Uljanova Street, Nizhny Novgorod 603950, RussiabMedical Academy of Nizhny Novgorod, 1 Minina Square, 10/1 Minina Square, Nizhny Novgorod 603005, Russia
| | - Lev A Matveev
- Institute of Applied Physics, Russian Academy of Sciences, 46 Uljanova Street, Nizhny Novgorod 603950, RussiabMedical Academy of Nizhny Novgorod, 1 Minina Square, 10/1 Minina Square, Nizhny Novgorod 603005, Russia
| | - Grigory V Gelikonov
- Institute of Applied Physics, Russian Academy of Sciences, 46 Uljanova Street, Nizhny Novgorod 603950, RussiabMedical Academy of Nizhny Novgorod, 1 Minina Square, 10/1 Minina Square, Nizhny Novgorod 603005, Russia
| | - Aleksandr A Sovetsky
- Institute of Applied Physics, Russian Academy of Sciences, 46 Uljanova Street, Nizhny Novgorod 603950, Russia
| | - Alex Vitkin
- Medical Academy of Nizhny Novgorod, 1 Minina Square, 10/1 Minina Square, Nizhny Novgorod 603005, RussiacUniversity Health Network and University of Toronto, 101 College Street, Toronto, Ontario M5G 1L7, Canada
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126
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Qiu Y, Zaki FR, Chandra N, Chester SA, Liu X. Nonlinear characterization of elasticity using quantitative optical coherence elastography. BIOMEDICAL OPTICS EXPRESS 2016; 7:4702-4710. [PMID: 27896009 PMCID: PMC5119609 DOI: 10.1364/boe.7.004702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 10/22/2016] [Accepted: 10/22/2016] [Indexed: 05/02/2023]
Abstract
Optical coherence elastography (OCE) has been used to perform mechanical characterization on biological tissue at the microscopic scale. In this work, we used quantitative optical coherence elastography (qOCE), a novel technology we recently developed, to study the nonlinear elastic behavior of biological tissue. The qOCE system had a fiber-optic probe to exert a compressive force to deform tissue under the tip of the probe. Using the space-division multiplexed optical coherence tomography (OCT) signal detected by a spectral domain OCT engine, we were able to simultaneously quantify the probe deformation that was proportional to the force applied, and to quantify the tissue deformation. In other words, our qOCE system allowed us to establish the relationship between mechanical stimulus and tissue response to characterize the stiffness of biological tissue. Most biological tissues have nonlinear elastic behavior, and the apparent stress-strain relationship characterized by our qOCE system was nonlinear an extended range of strain, for a tissue-mimicking phantom as well as biological tissues. Our experimental results suggested that the quantification of force in OCE was critical for accurate characterization of tissue mechanical properties and the qOCE technique was capable of differentiating biological tissues based on the elasticity of tissue that is generally nonlinear.
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Affiliation(s)
- Yi Qiu
- Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA
| | - Farzana R. Zaki
- Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA
| | - Namas Chandra
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA
| | - Shawn A. Chester
- Department of Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA
| | - Xuan Liu
- Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA
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127
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Allen WM, Chin L, Wijesinghe P, Kirk RW, Latham B, Sampson DD, Saunders CM, Kennedy BF. Wide-field optical coherence micro-elastography for intraoperative assessment of human breast cancer margins. BIOMEDICAL OPTICS EXPRESS 2016; 7:4139-4153. [PMID: 27867721 PMCID: PMC5102536 DOI: 10.1364/boe.7.004139] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/20/2016] [Accepted: 08/24/2016] [Indexed: 05/18/2023]
Abstract
Incomplete excision of malignant tissue is a major issue in breast-conserving surgery, with typically 20 - 30% of cases requiring a second surgical procedure arising from postoperative detection of an involved margin. We report advances in the development of a new intraoperative tool, optical coherence micro-elastography, for the assessment of tumor margins on the micro-scale. We demonstrate an important step by conducting whole specimen imaging in intraoperative time frames with a wide-field scanning system acquiring mosaicked elastograms with overall dimensions of ~50 × 50 mm, large enough to image an entire face of most lumpectomy specimens. This capability is enabled by a wide-aperture annular actuator with an internal diameter of 65 mm. We demonstrate feasibility by presenting elastograms recorded from freshly excised human breast tissue, including from a mastectomy, lumpectomies and a cavity shaving.
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Affiliation(s)
- Wes M. Allen
- Optical + Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun Street, Nedlands, WA 6009, Australia
| | - Lixin Chin
- Optical + Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun Street, Nedlands, WA 6009, Australia
| | - Philip Wijesinghe
- Optical + Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Rodney W. Kirk
- Optical + Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- Centre for Nanoscale BioPhotonics, Faculty of Health Science, University of Adelaide, Adelaide, SA 5005, Australia
| | - Bruce Latham
- PathWest, Fiona Stanley Hospital, 11 Robin Warren Drive, Murdoch, WA 6150, Australia
| | - David D. Sampson
- Optical + Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- Centre for Microscopy, Characterisation & Analysis, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Christobel M. Saunders
- School of Surgery, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- Breast Centre, Fiona Stanley Hospital, 11 Robin Warren Drive, Murdoch, WA 6150, Australia
- Breast Clinic, Royal Perth Hospital, 197 Wellington Street, Perth, WA 6000, Australia
| | - Brendan F. Kennedy
- Optical + Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, 6 Verdun Street, Nedlands, WA 6009, Australia
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128
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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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129
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Pokharel D, Wijesinghe P, Oenarto V, Lu JF, Sampson DD, Kennedy BF, Wallace VP, Bebawy M. Deciphering Cell-to-Cell Communication in Acquisition of Cancer Traits: Extracellular Membrane Vesicles Are Regulators of Tissue Biomechanics. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2016; 20:462-9. [DOI: 10.1089/omi.2016.0072] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Deep Pokharel
- Discipline of Pharmacy, The Graduate School of Health, University of Technology Sydney, Australia
| | - Philip Wijesinghe
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic and Computer Engineering, The University of Western Australia, Western Australia, Australia
| | - Vici Oenarto
- Discipline of Pharmacy, The Graduate School of Health, University of Technology Sydney, Australia
| | - Jamie F. Lu
- Discipline of Pharmacy, The Graduate School of Health, University of Technology Sydney, Australia
| | - David D. Sampson
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic and Computer Engineering, The University of Western Australia, Western Australia, Australia
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Western Australia, Australia
| | - Brendan F. Kennedy
- Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic and Computer Engineering, The University of Western Australia, Western Australia, Australia
- BRITElab, Harry Perkins Institute of Medical Research, Western Australia, Australia
| | - Vincent P. Wallace
- School of Physics, The University of Western Australia, Western Australia, Australia
| | - Mary Bebawy
- Discipline of Pharmacy, The Graduate School of Health, University of Technology Sydney, Australia
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130
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Hai P, Zhou Y, Gong L, Wang LV. Quantitative photoacoustic elastography in humans. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:66011. [PMID: 27304419 PMCID: PMC5994997 DOI: 10.1117/1.jbo.21.6.066011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 05/31/2016] [Indexed: 05/20/2023]
Abstract
We report quantitative photoacoustic elastography (QPAE) capable of measuring Young’s modulus of biological tissue in vivo in humans. By combining conventional PAE with a stress sensor having known stress–strain behavior, QPAE can simultaneously measure strain and stress, from which Young’s modulus is calculated. We first demonstrate the feasibility of QPAE in agar phantoms with different concentrations. The measured Young’s modulus values fit well with both the empirical expectation based on the agar concentrations and those measured in an independent standard compression test. Next, QPAE was applied to quantify the Young’s modulus of skeletal muscle in vivo in humans, showing a linear relationship between muscle stiffness and loading. The results demonstrated the capability of QPAE to assess the absolute elasticity of biological tissue noninvasively in vivo in humans, indicating its potential for tissue biomechanics studies and clinical applications.
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Affiliation(s)
- Pengfei Hai
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
| | - Yong Zhou
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
| | - Lei Gong
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
- University of Science and Technology of China, Department of Optics and Optical Engineering, Jinzhai Road 96, Hefei, Anhui 230026, China
| | - Lihong V. Wang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
- Address all correspondence to: Lihong V. Wang, E-mail:
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131
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Tsai MT, Lee IC, Lee ZF, Liu HL, Wang CC, Choia YC, Chou HY, Lee JD. In vivo investigation of temporal effects and drug delivery induced by transdermal microneedles with optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2016; 7:1865-76. [PMID: 27231627 PMCID: PMC4871087 DOI: 10.1364/boe.7.001865] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/10/2016] [Accepted: 04/11/2016] [Indexed: 05/26/2023]
Abstract
Transdermal drug-delivery systems (TDDS) have been a growing field in drug delivery because of their advantages over parenteral and oral administration. Recent studies illustrate that microneedles (MNs) can effectively penetrate through the stratum corneum barrier to facilitate drug delivery. However, the temporal effects on skin and drug diffusion are difficult to investigate in vivo. In this study, we used optical coherence tomography (OCT) to observe the process by which MNs dissolve and to investigate the temporal effects on mouse skin induced by MNs, including the morphological and vascular changes. Moreover, the recovery process of the skin was observed with OCT. Additionally, we proposed a method to observe drug delivery by estimation of cross-correlation relationship between sequential 2D OCT images obtained at the same location, reflecting the variation in the backscattered intensity due to the diffusion of the rhodamine molecules encapsulated in MNs. Our observations supported the hypothesis that the temporal effects on skin due to MNs, the dissolution of MNs, and the drug diffusion process can be quantitatively evaluated with OCT. The results showed that OCT can be a potential tool for in vivo monitoring of effects and outcomes when MNs are used as a TDDS.
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Affiliation(s)
- Meng-Tsan Tsai
- Department of Electrical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
- Medical Imaging Research Center, Institute for Radiological Research, Chang Gung University and Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - I-Chi Lee
- Graduate Institute of Biochemical and Biomedical Engineering, Chang Gung University, Taoyuan, Taiwan
| | - Zhung-Fu Lee
- Department of Electrical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
| | - Hao-Li Liu
- Department of Electrical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
- Medical Imaging Research Center, Institute for Radiological Research, Chang Gung University and Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Chun-Chieh Wang
- Medical Imaging Research Center, Institute for Radiological Research, Chang Gung University and Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Departments of Radiation Oncology, Chang Gung Memorial Hospital, Linkou, Taiwan
- Department of Medical Imaging and Radiological Science, Chang Gung University, Taoyuan, Taiwan
| | - Yo-Chun Choia
- Department of Electrical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
| | - Hsin-Yi Chou
- Department of Electrical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
| | - Jiann-Der Lee
- Department of Electrical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
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132
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Ahn Y, Lee CY, Baek S, Kim T, Kim P, Lee S, Min D, Lee H, Kim J, Jung W. Quantitative monitoring of laser-treated engineered skin using optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2016; 7:1030-41. [PMID: 27231605 PMCID: PMC4866446 DOI: 10.1364/boe.7.001030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/09/2016] [Accepted: 02/10/2016] [Indexed: 05/27/2023]
Abstract
Nowadays, laser therapy is a common method for treating various dermatological troubles such as acne and wrinkles because of its efficient and immediate skin enhancement. Although laser treatment has become a routine procedure in medical and cosmetic fields, the prevention of side-effects, such as hyperpigmentation, redness and burning, still remains a critical issue that needs to be addressed. In order to reduce the side-effects while attaining efficient therapeutic outcomes, it is essential to understand the light-skin interaction through evaluation of physiological changes before and after laser therapy. In this study, we introduce a quantitative tissue monitoring method based on optical coherence tomography (OCT) for the evaluation of tissue regeneration after laser irradiation. To create a skin injury model, we applied a fractional CO2 laser on a customized engineered skin model, which is analogous to human skin in terms of its basic biological function and morphology. The irradiated region in the skin was then imaged by a high-speed OCT system, and its morphologic changes were analyzed by automatic segmentation software. Volumetric OCT images in the laser treated area clearly visualized the wound healing progress at different time points and provided comprehensive information which cannot be acquired through conventional monitoring methods. The results showed that the laser wound in engineered skins was mostly recovered from within 1~2 days with a fast recovery time in the vertical direction. However, the entire recovery period varied widely depending on laser doses and skin type. Our results also indicated that OCT-guided laser therapy would be a very promising protocol for optimizing laser treatment for skin therapy.
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Affiliation(s)
- Yujin Ahn
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Chan-Young Lee
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Songyee Baek
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Taeho Kim
- FuturIST Co., Ltd., Ulsan, 44610, South Korea
| | - Pilun Kim
- Oz-Tec Co., Ltd., Daegu, 41566, South Korea
| | - Sunghoon Lee
- Amorepacific R&D center, Yongin, 17074, South Korea
| | - Daejin Min
- Amorepacific R&D center, Yongin, 17074, South Korea
| | - Haekwang Lee
- Amorepacific R&D center, Yongin, 17074, South Korea
| | - Jeehyun Kim
- School of Electronics Engineering, Kyungpook National University, Daegu, 41566, South Korea
| | - Woonggyu Jung
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
- Center of Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, South Korea
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133
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Qiu Y, Wang Y, Xu Y, Chandra N, Haorah J, Hubbi B, Pfister BJ, Liu X. Quantitative optical coherence elastography based on fiber-optic probe for in situ measurement of tissue mechanical properties. BIOMEDICAL OPTICS EXPRESS 2016; 7:688-700. [PMID: 26977372 PMCID: PMC4771481 DOI: 10.1364/boe.7.000688] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 01/12/2016] [Accepted: 01/16/2016] [Indexed: 05/18/2023]
Abstract
We developed a miniature quantitative optical coherence elastography (qOCE) instrument with an integrated Fabry-Perot force sensor, for in situ elasticity measurement of biological tissue. The technique has great potential for biomechanics modeling and clinical diagnosis. We designed the fiber-optic qOCE probe that was used to exert a compressive force to deform tissue at the tip of the probe. Using the space-division multiplexed optical coherence tomography (OCT) signal detected by a spectral domain OCT engine, we were able to quantify the probe deformation that was proportional to the force applied, and to quantify the tissue deformation corresponding to the external stimulus. Simultaneous measurement of force and displacement allowed us to extract Young's modulus of biological tissue. We experimentally calibrated our qOCE instrument, and validated its effectiveness on tissue mimicking phantoms and biological tissues.
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Affiliation(s)
- Yi Qiu
- Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Yahui Wang
- Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Yiqing Xu
- Department of Electrical and Electronic Engineering, Hong Kong University, Hong Kong, China
| | - Namas Chandra
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - James Haorah
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Basil Hubbi
- Department of Radiology, New Jersey Medical School, Newark, NJ, 07103, USA
| | - Bryan J. Pfister
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Xuan Liu
- Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA
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134
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Curatolo A, Villiger M, Lorenser D, Wijesinghe P, Fritz A, Kennedy BF, Sampson DD. Ultrahigh-resolution optical coherence elastography. OPTICS LETTERS 2016; 41:21-4. [PMID: 26696148 DOI: 10.1364/ol.41.000021] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Visualizing stiffness within the local tissue environment at the cellular and subcellular level promises to provide insight into the genesis and progression of disease. In this Letter, we propose ultrahigh-resolution optical coherence elastography (UHROCE), and demonstrate 3D imaging of local axial strain of tissues undergoing compressive loading. We combine optical coherence microscopy (OCM) and phase-sensitive detection of local tissue displacement to produce strain elastograms with resolution (x,y,z) of 2×2×15 μm. We demonstrate this performance on a freshly excised mouse aorta and reveal the mechanical heterogeneity of vascular smooth muscle cells and elastin sheets, otherwise unresolved in a typical, lower resolution optical coherence elastography (OCE) system.
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135
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Yoon JH, Yang YJ, Park J, Son H, Park H, Park GS, Ahn CB. Stiffness measurement using terahertz and acoustic waves for biological samples. OPTICS EXPRESS 2015; 23:32671-32678. [PMID: 26699056 DOI: 10.1364/oe.23.032671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A method is proposed to measure sample stiffness using terahertz wave and acoustic stimulation. The stiffness-dependent vibration is measured using terahertz wave (T-ray) during an acoustic stimulation. To quantify the vibration, time of the peak amplitude of the reflected T-ray is measured. In our experiment, the T-ray is asynchronously applied during the period of the acoustic stimulation, and multiple measurements are taken to use the standard deviation and the maximum difference in the peak times to estimate the amplitude of the vibration. Some preliminary results are shown using biological samples.
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