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Karlas A, Fasoula NA, Kallmayer M, Schäffer C, Angelis G, Katsouli N, Reidl M, Duelmer F, Al Adem K, Hadjileontiadis L, Eckstein HH, Ntziachristos V. Optoacoustic biomarkers of lipids, hemorrhage and inflammation in carotid atherosclerosis. Front Cardiovasc Med 2023; 10:1210032. [PMID: 38028502 PMCID: PMC10666780 DOI: 10.3389/fcvm.2023.1210032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 10/18/2023] [Indexed: 12/01/2023] Open
Abstract
Imaging plays a critical role in exploring the pathophysiology and enabling the diagnostics and therapy assessment in carotid artery disease. Ultrasonography, computed tomography, magnetic resonance imaging and nuclear medicine techniques have been used to extract of known characteristics of plaque vulnerability, such as inflammation, intraplaque hemorrhage and high lipid content. Despite the plethora of available techniques, there is still a need for new modalities to better characterize the plaque and provide novel biomarkers that might help to detect the vulnerable plaque early enough and before a stroke occurs. Optoacoustics, by providing a multiscale characterization of the morphology and pathophysiology of the plaque could offer such an option. By visualizing endogenous (e.g., hemoglobin, lipids) and exogenous (e.g., injected dyes) chromophores, optoacoustic technologies have shown great capability in imaging lipids, hemoglobin and inflammation in different applications and settings. Herein, we provide an overview of the main optoacoustic systems and scales of detail that enable imaging of carotid plaques in vitro, in small animals and humans. Finally, we discuss the limitations of this novel set of techniques while investigating their potential to enable a deeper understanding of carotid plaque pathophysiology and possibly improve the diagnostics in future patients with carotid artery disease.
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Affiliation(s)
- Angelos Karlas
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany
- Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Technical University of Munich (TUM), Munich, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
| | - Nikolina-Alexia Fasoula
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany
| | - Michael Kallmayer
- Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Technical University of Munich (TUM), Munich, Germany
| | - Christoph Schäffer
- Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Technical University of Munich (TUM), Munich, Germany
| | - Georgios Angelis
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany
| | - Nikoletta Katsouli
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany
| | - Mario Reidl
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany
| | - Felix Duelmer
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany
- Chair for Computer Aided Medical Procedures and Augmented Reality, Department of Informatics, Technical University of Munich, Munich, Germany
| | - Kenana Al Adem
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany
| | - Leontios Hadjileontiadis
- Department of Biomedical Engineering, Healthcare Engineering Innovation Center (HEIC), Khalifa University, Abu Dhabi, United Arab Emirates
- Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Hans-Henning Eckstein
- Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Technical University of Munich (TUM), Munich, Germany
| | - Vasilis Ntziachristos
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany
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He F, Hou W, Lan Y, Gao W, Zhou M, Li J, Liu S, Yang B, Zhang J. High Contrast Detection of Carotid Neothrombus with Strong Near-Infrared Absorption Selenium Nanosphere Enhanced Photoacoustic Imaging. Int J Nanomedicine 2023; 18:4043-4054. [PMID: 37520300 PMCID: PMC10377622 DOI: 10.2147/ijn.s404743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 07/04/2023] [Indexed: 08/01/2023] Open
Abstract
Background Carotid artery thrombosis is the leading cause of stroke. Since there are no apparent symptoms in the early stages of carotid atherosclerosis onset, it causes a more significant clinical diagnosis. Photoacoustic (PA) imaging provides high contrast and good depth information, which has been used for the early detection and diagnosis of many diseases. Methods We investigated thrombus formation by using 20% ferric chloride (FeCl3) in the carotid arteries of KM mice for the thrombosis model. The near-infrared selenium/polypyrrole (Se@PPy) nanomaterials are easy to synthesize and have excellent optical absorption in vivo, which can be used as PA contrast agents to obtain thrombosis information. Results In vitro experiments showed that Se@PPy nanocomposites have fulfilling PA ability in the 700 nm to 900 nm wavelength range. In the carotid atherosclerosis model, maximum PA signal enhancement up to 3.44, 4.04, and 5.07 times was observed by injection of Se@PPy nanomaterials, which helped to diagnose the severity of carotid atherosclerosis. Conclusion The superior PA signal of Se@PPy nanomaterials can identify the extent of atherosclerotic carotid lesions, demonstrating the feasibility of PA imaging technology in diagnosing carotid thrombosis lesion formation. This study demonstrates nanocomposites and PA techniques for imaging and diagnosing carotid thrombosis in vivo.
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Affiliation(s)
- Fengbing He
- Qingyuan People’s Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangdong, People’s Republic of China
| | - Wenzhong Hou
- Qingyuan People’s Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangdong, People’s Republic of China
| | - Yintao Lan
- Qingyuan People’s Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangdong, People’s Republic of China
- Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangdong, People’s Republic of China
| | - Weijian Gao
- Qingyuan People’s Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangdong, People’s Republic of China
| | - Mengyu Zhou
- Qingyuan People’s Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangdong, People’s Republic of China
| | - Jinghang Li
- Qingyuan People’s Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangdong, People’s Republic of China
| | - Shutong Liu
- Qingyuan People’s Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangdong, People’s Republic of China
| | - Bin Yang
- Qingyuan People’s Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangdong, People’s Republic of China
| | - Jian Zhang
- Qingyuan People’s Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangdong, People’s Republic of China
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Noninvasive photoacoustic computed tomography/ultrasound imaging to identify high-risk atherosclerotic plaques. Eur J Nucl Med Mol Imaging 2022; 49:4601-4615. [DOI: 10.1007/s00259-022-05911-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 07/07/2022] [Indexed: 11/04/2022]
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Li M, Shi J, Yiu CCY, Li C, Wong KKY, Wang L. Near-infrared double-illumination optical-resolution photoacoustic microscopy. JOURNAL OF BIOPHOTONICS 2021; 14:e202000392. [PMID: 33205905 DOI: 10.1002/jbio.202000392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/28/2020] [Accepted: 11/16/2020] [Indexed: 06/11/2023]
Abstract
Label-free chemical bond imaging is of great importance in biology and medicine. Photoacoustic imaging at the third near-infrared windows (1600-1870 nm, near-infrared-III) provides a stable molecular vibrational imaging tool for lipid-rich tissue owing to the first overtone transition of the CH bond at 1.7 μm. However, lacking high-energy pulsed laser sources at 1.7 μm and the strong water absorption significantly limit the signal-to-noise ratio of the lipid imaging, especially for thin lipid tissues. To circumvent this barrier, we develop near-infrared-III double-illumination optical-resolution photoacoustic microscopy (DIOR-PAM) for improving the sensitivity of label-free lipid imaging. Using the same laser, DIOR-PAM can enhance the sensitivity by nearly 100%, which we prove in the Monte Carlo simulation. We experimentally demonstrated 50% ~ 100% sensitivity enhancements on nonbiological and biological lipid-rich samples.
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Affiliation(s)
- Mingsheng Li
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, China
| | - Jiawei Shi
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
| | - Canice Chun-Yin Yiu
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
| | - Can Li
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
| | - Kenneth Kin-Yip Wong
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
| | - Lidai Wang
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen, China
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Ravina K, Lin L, Liu CY, Thomas D, Hasson D, Wang LV, Russin JJ. Prospects of Photo- and Thermoacoustic Imaging in Neurosurgery. Neurosurgery 2020; 87:11-24. [PMID: 31620798 DOI: 10.1093/neuros/nyz420] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 07/25/2019] [Indexed: 12/25/2022] Open
Abstract
The evolution of neurosurgery has been, and continues to be, closely associated with innovations in technology. Modern neurosurgery is wed to imaging technology and the future promises even more dependence on anatomic and, perhaps more importantly, functional imaging. The photoacoustic phenomenon was described nearly 140 yr ago; however, biomedical applications for this technology have only recently received significant attention. Light-based photoacoustic and microwave-based thermoacoustic technologies represent novel biomedical imaging modalities with broad application potential within and beyond neurosurgery. These technologies offer excellent imaging resolution while generally considered safer, more portable, versatile, and convenient than current imaging technologies. In this review, we summarize the current state of knowledge regarding photoacoustic and thermoacoustic imaging and their potential impact on the field of neurosurgery.
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Affiliation(s)
- Kristine Ravina
- Neurorestoration Center, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Li Lin
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering, Department of Electrical Engineering, California Institute of Technology, Pasadena, California.,Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri
| | - Charles Y Liu
- Neurorestoration Center, Keck School of Medicine, University of Southern California, Los Angeles, California.,Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California.,Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, California.,Tianqiao and Chrissy Chen Brain-machine Interface Center, California Institute of Technology, Pasadena, California
| | - Debi Thomas
- Department of Surgery, University of California Davis, Davis, California
| | - Denise Hasson
- Division of Critical Care Medicine, Cincinnati Children's Hospital, Cincinnati, Ohio
| | - Lihong V Wang
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering, Department of Electrical Engineering, California Institute of Technology, Pasadena, California
| | - Jonathan J Russin
- Neurorestoration Center, Keck School of Medicine, University of Southern California, Los Angeles, California.,Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California
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Xie Z, Yang Y, He Y, Shu C, Chen D, Zhang J, Chen J, Liu C, Sheng Z, Liu H, Liu J, Gong X, Song L, Dong S. In vivo assessment of inflammation in carotid atherosclerosis by noninvasive photoacoustic imaging. Am J Cancer Res 2020; 10:4694-4704. [PMID: 32292523 PMCID: PMC7150488 DOI: 10.7150/thno.41211] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 02/15/2020] [Indexed: 01/22/2023] Open
Abstract
Objectives: The objective of this study was to demonstrate the feasibility of using noninvasive photoacoustic imaging technology along with novel semiconducting polymer nanoparticles for in vivo identifying inflammatory components in carotid atherosclerosis and assessing the severity of inflammation using mouse models. Methods and Results: Healthy carotid arteries and atherosclerotic carotid arteries were imaged in vivo by the noninvasive photoacoustic imaging system. Molecular probes PBD-CD36 were used to label the inflammatory cells to show the inflammation information by photoacoustic imaging. In in vivo imaging experiments, we observed the maximum photoacoustic signal enhancement of 4.3, 5.2, 8 and 16.3 times between 24 h post probe injection and that before probe injection in four carotid arteries belonging to three atherosclerotic mice models. In the corresponding carotid arteries stained with CD36, the ratio of 0.043, 0.061, 0.082 and 0.113 was found between CD36 positive (CD36(+)) expression area and intima-media area (P < 0.05). For the CD36(+) expression less than 0.008 in eight arteries, no photoacoustic signal enhancement was found due to the limited system sensitivity. The photoacoustic signal reflects CD36(+) expression in plaques, which shows the feasibility of using photoacoustic imaging for in vivo assessment of carotid atherosclerosis. Conclusion: This research demonstrates a semiconducting polymer nanoparticle along with photoacoustic technology for noninvasive imaging and assessment of inflammation of carotid atherosclerotic plaques in vivo.
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Simpson J, van Wijk K, Adam L, Smith C. Laser ultrasonic measurements to estimate the elastic properties of rock samples under in situ conditions. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2019; 90:114503. [PMID: 31779445 DOI: 10.1063/1.5120078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/30/2019] [Indexed: 06/10/2023]
Abstract
We present a new noncontact methodology to excite and detect ultrasonic waves in rocks under in situ pressure and temperature conditions. Optical windows in the side of a pressure vessel allow the passage of a laser source and a receiver for noncontact laser ultrasonic measurements. A heating mantle controls the temperature, and a rotational stage inside the vessel makes it possible to obtain measurements as a function of angle. This methodology is the first to combine the advantages of laser ultrasonics (LUS) over traditional transducer methods with measurements under in situ pressure and temperature conditions. These advantages include the absence of mechanical coupling, small sampling area, and broadband recordings of absolute displacement. After describing the experimental setup, we present control experiments to validate the accuracy of this new system for acquiring rock physics data. Densely sampled rotational scans performed on an Alpine Fault ultramylonite rock reveal a decrease in P-wave anisotropy from 62% at atmospheric pressure to 36% at 16 MPa. This result highlights the importance of performing rock physics measurements under in situ confining stress and demonstrates the advantages of the methodology for investigating anisotropy. In addition, a 5.6% decrease in the P-wave velocity of the ultramylonite sample between 20 °C and 100 °C at a constant 10 MPa confining stress demonstrates the capability of this new methodology for acquiring data under both in situ pressure and temperature conditions. This new methodology opens the door for probing the pressure and temperature dependence of the elastic properties of rocks and other materials using LUS techniques.
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Affiliation(s)
- Jonathan Simpson
- The Dodd-Walls Centre for Photonic and Quantum Technologies, Auckland 1010, New Zealand
| | - Kasper van Wijk
- The Dodd-Walls Centre for Photonic and Quantum Technologies, Auckland 1010, New Zealand
| | - Ludmila Adam
- Physics of Rocks Laboratory, School of Environment, The University of Auckland, Auckland 1010, New Zealand
| | - Caitlin Smith
- Physical Acoustics Laboratory, Department of Physics, The University of Auckland, Auckland 1010, New Zealand
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Jin H, Zhang R, Liu S, Zheng Z, Zheng Y. A Single Sensor Dual-Modality Photoacoustic Fusion Imaging for Compensation of Light Fluence Variation. IEEE Trans Biomed Eng 2019; 66:1810-1813. [DOI: 10.1109/tbme.2019.2904502] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Pasarikovski CR, Cardinell J, Yang VXD. Perspective review on applications of optics in cerebral endovascular neurosurgery. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-7. [PMID: 30915784 PMCID: PMC6975230 DOI: 10.1117/1.jbo.24.3.030601] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 02/19/2019] [Indexed: 05/20/2023]
Abstract
Cerebral endovascular neurosurgery has transformed the way we manage cerebrovascular disease. Several landmark trials have demonstrated the effectiveness of endovascular techniques leading to continued technological development and applications for various diseases. The utilization of optical technologies and devices is already underway in the field of endovascular neurosurgery. We discuss the contemporary paradigms, challenges, and current optical applications for the most common cerebrovascular diseases: carotid atherosclerotic disease, cerebral aneurysms, intracranial atherosclerosis, and dural arteriovenous fistulas. We also describe needs-based opportunities for future optical applications, with the goal of providing researchers a sense of where we feel optical technologies could impact the way we manage cerebral disease.
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Affiliation(s)
- Christopher R. Pasarikovski
- University of Toronto, Division of Neurosurgery, Department of Surgery, Toronto, Ontario, Canada
- Sunnybrook Health Sciences Centre, NeuroVascular Clinic, Toronto, Ontario, Canada
| | - Jillian Cardinell
- Ryerson University, Bioengineering and Biophotonics Laboratory, Toronto, Ontario, Canada
- Sunnybrook Health Sciences Centre, Division of Neurosurgery, Toronto, Ontario, Canada
| | - Victor X. D. Yang
- University of Toronto, Division of Neurosurgery, Department of Surgery, Toronto, Ontario, Canada
- Sunnybrook Health Sciences Centre, NeuroVascular Clinic, Toronto, Ontario, Canada
- Ryerson University, Bioengineering and Biophotonics Laboratory, Toronto, Ontario, Canada
- Sunnybrook Health Sciences Centre, Division of Neurosurgery, Toronto, Ontario, Canada
- Address all correspondence to Victor X. D. Yang, E-mail:
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Zhang X, Fincke JR, Wynn CM, Johnson MR, Haupt RW, Anthony BW. Full noncontact laser ultrasound: first human data. LIGHT, SCIENCE & APPLICATIONS 2019; 8:119. [PMID: 31885865 PMCID: PMC6923376 DOI: 10.1038/s41377-019-0229-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 11/25/2019] [Accepted: 11/27/2019] [Indexed: 05/23/2023]
Abstract
Full noncontact laser ultrasound (LUS) imaging has several distinct advantages over current medical ultrasound (US) technologies: elimination of the coupling mediums (gel/water), operator-independent image quality, improved repeatability, and volumetric imaging. Current light-based ultrasound utilizing tissue-penetrating photoacoustics (PA) generally uses traditional piezoelectric transducers in contact with the imaged tissue or carries an optical fiber detector close to the imaging site. Unlike PA, the LUS design presented here minimizes the optical penetration and specifically restricts optical-to-acoustic energy transduction at the tissue surface, maximizing the generated acoustic source amplitude. With an appropriate optical design and interferometry, any exposed tissue surfaces can become viable acoustic sources and detectors. LUS operates analogously to conventional ultrasound but uses light instead of piezoelectric elements. Here, we present full noncontact LUS results, imaging targets at ~5 cm depths and at a meter-scale standoff from the target surface. Experimental results demonstrating volumetric imaging and the first LUS images on humans are presented, all at eye- and skin-safe optical exposure levels. The progression of LUS imaging from tissue-mimicking phantoms, to excised animal tissue, to humans in vivo is shown, with validation from conventional ultrasound images. The LUS system design insights and results presented here inspire further LUS development and are a significant step toward the clinical implementation of LUS.
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Affiliation(s)
- Xiang Zhang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139 USA
- Institute for Medical Engineering & Science, Massachusetts Institute of Technology, 45 Carleton St., Cambridge, MA 02142 USA
| | - Jonathan R. Fincke
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139 USA
- Institute for Medical Engineering & Science, Massachusetts Institute of Technology, 45 Carleton St., Cambridge, MA 02142 USA
| | - Charles M. Wynn
- Lincoln Laboratory, Massachusetts Institute of Technology, 244 Wood Street, Lexington, MA 02421 USA
| | - Matt R. Johnson
- Lincoln Laboratory, Massachusetts Institute of Technology, 244 Wood Street, Lexington, MA 02421 USA
| | - Robert W. Haupt
- Lincoln Laboratory, Massachusetts Institute of Technology, 244 Wood Street, Lexington, MA 02421 USA
| | - Brian W. Anthony
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139 USA
- Institute for Medical Engineering & Science, Massachusetts Institute of Technology, 45 Carleton St., Cambridge, MA 02142 USA
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Fincke JR, Wynn CM, Haupt R, Zhang X, Rivera D, Anthony B. Characterization of laser ultrasound source signals in biological tissues for imaging applications. JOURNAL OF BIOMEDICAL OPTICS 2018; 24:1-11. [PMID: 30550046 PMCID: PMC6987635 DOI: 10.1117/1.jbo.24.2.021206] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 11/07/2018] [Indexed: 05/30/2023]
Abstract
Short optical pulses emitted from a tunable Q-switched laser (800 to 2000 nm) generate laser ultrasound (LUS) signals at the surface of biological tissue. The LUS signal's acoustic frequency content, dependence on sample type, and optical wavelength are observed in the far field. The experiments yield a reference dataset for the design of noncontact LUS imaging systems. Measurements show that the majority of LUS signal energy in biological tissues is within the 0.5 and 3 MHz frequency bands and the total acoustic energy generated increases with the optical absorption coefficient of water, which governs tissue optical absorption in the infrared range. The experimental results also link tissue surface roughness and acoustic attenuation with limited LUS signal bandwidth in biological tissue. Images constructed using 810-, 1064-, 1550-, and 2000-nm generation laser wavelengths and a contact piezoelectric receiver demonstrates the impact of the generation laser wavelength on image quality. A noncontact LUS-based medical imaging system has the potential to be an effective medical imaging device. Such a system may mitigate interoperator variability associated with current medical ultrasound imaging techniques and expand the scope of imaging applications for ultrasound.
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Affiliation(s)
- Jonathan R. Fincke
- Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Massachusetts, United States
- Institute for Medical Engineering and Science (IMES), Massachusetts Institute of Technology, Cambridge, Massachusetts, United States
| | - Charles M. Wynn
- Massachusetts Institute of Technology, Lincoln Laboratory, Lexington, Massachusetts, United States
| | - Rob Haupt
- Massachusetts Institute of Technology, Lincoln Laboratory, Lexington, Massachusetts, United States
| | - Xiang Zhang
- Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Massachusetts, United States
- Institute for Medical Engineering and Science (IMES), Massachusetts Institute of Technology, Cambridge, Massachusetts, United States
| | - Diego Rivera
- Massachusetts Institute of Technology, Lincoln Laboratory, Lexington, Massachusetts, United States
| | - Brian Anthony
- Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Massachusetts, United States
- Institute for Medical Engineering and Science (IMES), Massachusetts Institute of Technology, Cambridge, Massachusetts, United States
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