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Los J, Mensink FB, Mohammadnia N, Opstal TSJ, Damman P, Volleberg RHJA, Peeters DAM, van Royen N, Garcia-Garcia HM, Cornel JH, El Messaoudi S, van Geuns RJM. Invasive coronary imaging of inflammation to further characterize high-risk lesions: what options do we have? Front Cardiovasc Med 2024; 11:1352025. [PMID: 38370159 PMCID: PMC10871865 DOI: 10.3389/fcvm.2024.1352025] [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: 12/07/2023] [Accepted: 01/15/2024] [Indexed: 02/20/2024] Open
Abstract
Coronary atherosclerosis remains a leading cause of morbidity and mortality worldwide. The underlying pathophysiology includes a complex interplay of endothelial dysfunction, lipid accumulation and inflammatory pathways. Multiple structural and inflammatory features of the atherosclerotic lesions have become targets to identify high-risk lesions. Various intracoronary imaging devices have been developed to assess the morphological, biocompositional and molecular profile of the intracoronary atheromata. These techniques guide interventional and therapeutical management and allow the identification and stratification of atherosclerotic lesions. We sought to provide an overview of the inflammatory pathobiology of atherosclerosis, distinct high-risk plaque features and the ability to visualize this process with contemporary intracoronary imaging techniques.
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Affiliation(s)
- Jonathan Los
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Frans B. Mensink
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
| | | | - Tjerk S. J. Opstal
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
- Department of Cardiology, Northwest Clinics, Alkmaar, Netherlands
| | - Peter Damman
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
| | | | - Denise A. M. Peeters
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Niels van Royen
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
| | | | - Jan H. Cornel
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
- Department of Cardiology, Northwest Clinics, Alkmaar, Netherlands
- Dutch Network for Cardiovascular Research (WCN), Utrecht, Netherlands
| | - Saloua El Messaoudi
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
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2
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Lee Y, Low MJ, Yang D, Nam HK, Le TSD, Lee SE, Han H, Kim S, Vu QH, Yoo H, Yoon H, Lee J, Sandeep S, Lee K, Kim SW, Kim YJ. Ultra-thin light-weight laser-induced-graphene (LIG) diffractive optics. LIGHT, SCIENCE & APPLICATIONS 2023; 12:146. [PMID: 37322023 DOI: 10.1038/s41377-023-01143-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 03/13/2023] [Accepted: 03/30/2023] [Indexed: 06/17/2023]
Abstract
The realization of hybrid optics could be one of the best ways to fulfill the technological requirements of compact, light-weight, and multi-functional optical systems for modern industries. Planar diffractive lens (PDL) such as diffractive lenses, photonsieves, and metasurfaces can be patterned on ultra-thin flexible and stretchable substrates and be conformally attached on top of arbitrarily shaped surfaces. In this review, we introduce recent research works addressed to the design and manufacturing of ultra-thin graphene optics, which will open new markets in compact and light-weight optics for next-generation endoscopic brain imaging, space internet, real-time surface profilometry, and multi-functional mobile phones. To provide higher design flexibility, lower process complexity, and chemical-free process with reasonable investment cost, direct laser writing (DLW) of laser-induced-graphene (LIG) is actively being applied to the patterning of PDL. For realizing the best optical performances in DLW, photon-material interactions have been studied in detail with respect to different laser parameters; the resulting optical characteristics have been evaluated in terms of amplitude and phase. A series of exemplary laser-written 1D and 2D PDL structures have been actively demonstrated with different base materials, and then, the cases are being expanded to plasmonic and holographic structures. The combination of these ultra-thin and light-weight PDL with conventional bulk refractive or reflective optical elements could bring together the advantages of each optical element. By integrating these suggestions, we suggest a way to realize the hybrid PDL to be used in the future micro-electronics surface inspection, biomedical, outer space, and extended reality (XR) industries.
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Affiliation(s)
- Younggeun Lee
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Mun Ji Low
- School of Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, 639798, Singapore, Singapore
- Panasonic Factory Solutions Asia Pacific (PFSAP), 285 Jalan Ahmad Ibrahim, 639931, Singapore, Singapore
| | - Dongwook Yang
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Han Ku Nam
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Truong-Son Dinh Le
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Seung Eon Lee
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hyogeun Han
- Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Seunghwan Kim
- Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Quang Huy Vu
- Department of Mechanical System Design Engineering, Seoul National University of Science and Technology (Seuoltech), 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea
| | - Hongki Yoo
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hyosang Yoon
- Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Joohyung Lee
- Department of Mechanical System Design Engineering, Seoul National University of Science and Technology (Seuoltech), 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea
| | - Suchand Sandeep
- School of Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Keunwoo Lee
- LASER N GRAPN INC., 193 Munji-ro, Yuseong-gu, Daejeon, 34051, Republic of Korea
| | - Seung-Woo Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Young-Jin Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
- Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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3
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Nishimiya K, Poduval RK, Tearney GJ. OCT Emerging Technologies: Coronary Micro-optical Coherence Tomography. Interv Cardiol Clin 2023; 12:237-244. [PMID: 36922064 DOI: 10.1016/j.iccl.2023.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
Optical coherence tomography (OCT) is an imaging modality that is used in a significant number of interventional cardiology procedures. Key structural changes occurring within the vessel wall, including presence of neutrophils, macrophages, monocytes, and vascular smooth muscle cells, are below the resolution of clinical intracoronary OCT. To address this challenge, a new form of OCT with 1 to 2 μm resolution, termed micro-OCT (μOCT), has been developed. This review article summarizes the ability of μOCT technology to visualize coronary microstructures and discusses its clinical implications.
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Affiliation(s)
- Kensuke Nishimiya
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan
| | - Radhika K Poduval
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Guillermo J Tearney
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA; Department of Pathology, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA; Harvard-MIT Division of Health Sciences and Technology Division, Cambridge, MA, USA.
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4
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ZHAO JINGJING, WINETRAUB YONATAN, DU LIN, VAN VLECK AIDAN, ICHIMURA KENZO, HUANG CHENG, AAsI SUMAIRAZ, SARIN KAVITAY, DE LA ZERDA ADAM. Flexible method for generating needle-shaped beams and its application in optical coherence tomography. OPTICA 2022; 9:859-867. [PMID: 37283722 PMCID: PMC10243785 DOI: 10.1364/optica.456894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 06/24/2022] [Indexed: 06/08/2023]
Abstract
Needle-shaped beams (NBs) featuring a long depth-of-focus (DOF) can drastically improve the resolution of microscopy systems. However, thus far, the implementation of a specific NB has been onerous due to the lack of a common, flexible generation method. Here we develop a spatially multiplexed phase pattern that creates many axially closely spaced foci as a universal platform for customizing various NBs, allowing flexible manipulations of beam length and diameter, uniform axial intensity, and sub-diffraction-limit beams. NBs designed via this method successfully extended the DOF of our optical coherence tomography (OCT) system. It revealed clear individual epidermal cells of the entire human epidermis, fine structures of human dermal-epidermal junction in a large depth range, and a high-resolution dynamic heartbeat of alive Drosophila larvae.
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Affiliation(s)
- JINGJING ZHAO
- Department of Structural Biology, Stanford University School ofMedicine, Stanford, California 94305, USA
| | - YONATAN WINETRAUB
- Department of Structural Biology, Stanford University School ofMedicine, Stanford, California 94305, USA
- Biophysics Program at Stanford, Stanford, California 94305, USA
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA
- The Bio-X Program, Stanford, California 94305, USA
| | - LIN DU
- Department ofElectrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - AIDAN VAN VLECK
- Department of Structural Biology, Stanford University School ofMedicine, Stanford, California 94305, USA
| | - KENZO ICHIMURA
- Division of Pulmonary, Allergy and Critical Care, Stanford University School ofMedicine, Stanford, California 94305, USA
- Vera Moulton Wall Center of Pulmonary Vascular Disease, Stanford University School of Medicine, Stanford, California 94304, USA
- Cardiovascular Institute, Stanford University School of Medicine, Stanford, California 94304, USA
| | - CHENG HUANG
- Department of Biology, Stanford University, Stanford, California 94305, USA
| | - SUMAIRA Z. AAsI
- Department of Dermatology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - KAVITA Y. SARIN
- Department of Dermatology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - ADAM DE LA ZERDA
- Department of Structural Biology, Stanford University School ofMedicine, Stanford, California 94305, USA
- Biophysics Program at Stanford, Stanford, California 94305, USA
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA
- The Bio-X Program, Stanford, California 94305, USA
- The Chan Zuckerberg Biohub, San Francisco, California 94158, USA
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5
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Kim Y, Cho M, Paulson B, Kim SH, Kim JK. Minimizing Motion Artifacts in Intravital Microscopy Using the Sedative Effect of Dexmedetomidine. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2022; 28:1-8. [PMID: 35599594 DOI: 10.1017/s1431927622000708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Among intravital imaging instruments, the intravital two-photon fluorescence excitation microscope has the advantage of enabling real-time 3D fluorescence imaging deep into cells and tissues, with reduced photobleaching and photodamage compared with conventional intravital confocal microscopes. However, excessive motion of organs due to involuntary movement such as breathing may result in out-of-focus images and severe fluorescence intensity fluctuations, which hinder meaningful imaging and analysis. The clinically approved alpha-2 adrenergic receptor agonist dexmedetomidine was administered to mice during two-photon fluorescence intravital imaging to alleviate this problem. As dexmedetomidine blocks the release of the neurotransmitter norepinephrine, pain is suppressed, blood pressure is reduced, and a sedation effect is observed. By tracking the quality of focus and stability of detected fluorescence in two-photon fluorescence images of fluorescein isothiocyanate-sensitized liver vasculature in vivo, we demonstrated that intravascular dexmedetomidine can reduce fluorescence fluctuations caused by respiration on a timescale of minutes in mice, improving image quality and resolution. The results indicate that short-term dexmedetomidine treatment is suitable for reducing involuntary motion in preclinical intravital imaging studies. This method may be applicable to other animal models.
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Affiliation(s)
- Youngkyu Kim
- Biomedical Engineering Research Center, Asan Medical Center, Seoul 05505, Republic of Korea
| | - Minju Cho
- Biomedical Engineering Research Center, Asan Medical Center, Seoul 05505, Republic of Korea
| | - Bjorn Paulson
- Biomedical Engineering Research Center, Asan Medical Center, Seoul 05505, Republic of Korea
| | - Sung-Hoon Kim
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-Gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Jun Ki Kim
- Biomedical Engineering Research Center, Asan Medical Center, Seoul 05505, Republic of Korea
- Department of Convergence Medicine, University of Ulsan, College of Medicine, 88, Olympic-ro 43-Gil, Seoul 05505, Republic of Korea
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6
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SHEIL CONORJ, WARTAK ANDREAS, SPICER GRAHAMLC, TEARNEY GUILLERMOJ. Extended depth of focus by self-imaging wavefront division with the mirror tunnel. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2022; 39:711-725. [PMID: 35471398 PMCID: PMC9232290 DOI: 10.1364/josaa.448848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
The mirror tunnel is a component used to extend the depth of focus for compact imaging probes used in endoscopic optical coherence tomography (OCT). A fast and accurate method for mirror tunnel probe simulation, characterization, and optimization is needed, with the aim of reconciling wave- and ray-optics simulation methods and providing a thorough description of the physical operating principle of the mirror tunnel. BeamLab software, employing the beam propagation method, was used to explore the parameter space and quantify lateral resolution and depth of focus extension. The lateral resolution performance was found to depend heavily on the metric chosen, implying that care should be taken in the interpretation of optimization and simulation results. Interpreting the mirror tunnel exit face as an extended object gives an understanding of the probe operation, decoupling it from the focusing optics and potentially helping to reduce the parameter space for future optimization.
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Affiliation(s)
- CONOR J. SHEIL
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
- Department of Dermatology, Harvard Medical School, Harvard University, Boston, Massachusetts 02115, USA
| | - ANDREAS WARTAK
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
- Department of Dermatology, Harvard Medical School, Harvard University, Boston, Massachusetts 02115, USA
| | - GRAHAM L. C. SPICER
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
- Department of Dermatology, Harvard Medical School, Harvard University, Boston, Massachusetts 02115, USA
| | - GUILLERMO J. TEARNEY
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts 02139, USA
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
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7
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Lee MW, Jang N, Choi N, Yang S, Jeong J, Nam HS, Oh S, Kim K, Hwang D. In Vivo Cellular-Level 3D Imaging of Peripheral Nerves Using a Dual-Focusing Technique for Intra-Neural Interface Implantation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2102876. [PMID: 34845862 PMCID: PMC8787432 DOI: 10.1002/advs.202102876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 11/09/2021] [Indexed: 06/13/2023]
Abstract
In vivo volumetric imaging of the microstructural changes of peripheral nerves with an inserted electrode could be key for solving the chronic implantation failure of an intra-neural interface necessary to provide amputated patients with natural motion and sensation. Thus far, no imaging devices can provide a cellular-level three-dimensional (3D) structural images of a peripheral nerve in vivo. In this study, an optical coherence tomography-based peripheral nerve imaging platform that employs a newly proposed depth of focus extension technique is reported. A point spread function with the finest transverse resolution of 1.27 µm enables the cellular-level volumetric visualization of the metal wire and microstructural changes in a rat sciatic nerve with the metal wire inserted in vivo. Further, the feasibility of applying the imaging platform to large animals for a preclinical study is confirmed through in vivo rabbit sciatic nerve imaging. It is expected that new possibilities for the successful chronic implantation of an intra-neural interface will open up by providing the 3D microstructural changes of nerves around the inserted electrode.
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Affiliation(s)
- Min Woo Lee
- Center for Intelligent and Interactive RoboticsKorea Institute of Science and TechnologySeoul02792Republic of Korea
| | - Namseon Jang
- Center for Intelligent and Interactive RoboticsKorea Institute of Science and TechnologySeoul02792Republic of Korea
| | - Nara Choi
- Center for Intelligent and Interactive RoboticsKorea Institute of Science and TechnologySeoul02792Republic of Korea
| | - Sungwook Yang
- Center for Intelligent and Interactive RoboticsKorea Institute of Science and TechnologySeoul02792Republic of Korea
| | - Jinwoo Jeong
- Center for Intelligent and Interactive RoboticsKorea Institute of Science and TechnologySeoul02792Republic of Korea
| | - Hyeong Soo Nam
- Department of Mechanical EngineeringKorea Advanced Institute of Science and TechnologyDaejeon34141Republic of Korea
| | - Sang‐Rok Oh
- Center for Intelligent and Interactive RoboticsKorea Institute of Science and TechnologySeoul02792Republic of Korea
| | - Keehoon Kim
- Department of Mechanical EngineeringPohang University of Science and TechnologyGyeongbuk37673Republic of Korea
| | - Donghyun Hwang
- Center for Intelligent and Interactive RoboticsKorea Institute of Science and TechnologySeoul02792Republic of Korea
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8
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Aborahama Y, Mojahedi M. Designing optical fields in inhomogeneous media. OPTICS LETTERS 2021; 46:5236-5239. [PMID: 34653161 DOI: 10.1364/ol.438534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
Designing optical fields with predetermined properties in source-free inhomogeneous media has been a long-sought goal due to its potential utilization in many applications, such as optical trapping, micromachining, imaging, and data communications. Using ideas from the calculus of variations, we provide a general framework based on the Helmholtz equation to design optical fields with prechosen amplitude and phase inside an inhomogeneous medium. The generated field is guaranteed to be the closest physically possible rendition of the desired field. The developed analytical approach is then verified via different techniques, where the approach's validity is demonstrated by generating the desired optical fields in different inhomogeneous media.
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Iyer JS, Yin B, Stankovic KM, Tearney GJ. Endomicroscopy of the human cochlea using a micro-optical coherence tomography catheter. Sci Rep 2021; 11:17932. [PMID: 34504113 PMCID: PMC8429662 DOI: 10.1038/s41598-021-95991-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/20/2021] [Indexed: 01/11/2023] Open
Abstract
Sensorineural hearing loss (SNHL) is one of the most profound public health concerns of the modern era, affecting 466 million people today, and projected to affect 900 million by the year 2050. Advances in both diagnostics and therapeutics for SNHL have been impeded by the human cochlea’s inaccessibility for in vivo imaging, resulting from its extremely small size, convoluted coiled configuration, fragility, and deep encasement in dense bone. Here, we develop and demonstrate the ability of a sub-millimeter-diameter, flexible endoscopic probe interfaced with a micro-optical coherence tomography (μOCT) imaging system to enable micron-scale imaging of the inner ear’s sensory epithelium in cadaveric human inner ears.
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Affiliation(s)
- Janani S Iyer
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, 243 Charles St, Boston, MA, 02114, USA.,Program in Speech and Hearing Bioscience and Technology, Harvard University Graduate School of Arts and Sciences, 1350 Massachusetts Ave, Cambridge, MA, 02138, USA.,Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA.,Department of Pathology, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - Biwei Yin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA.,Department of Pathology, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - Konstantina M Stankovic
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, 243 Charles St, Boston, MA, 02114, USA. .,Program in Speech and Hearing Bioscience and Technology, Harvard University Graduate School of Arts and Sciences, 1350 Massachusetts Ave, Cambridge, MA, 02138, USA. .,Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94503, USA. .,Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, 801 Welch Road, Stanford, CA, 94305, USA.
| | - Guillermo J Tearney
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA. .,Department of Pathology, Massachusetts General Hospital, Boston, MA, 02114, USA.
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10
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Li J, Montarello NJ, Hoogendoorn A, Verjans JW, Bursill CA, Peter K, Nicholls SJ, McLaughlin RA, Psaltis PJ. Multimodality Intravascular Imaging of High-Risk Coronary Plaque. JACC Cardiovasc Imaging 2021; 15:145-159. [PMID: 34023267 DOI: 10.1016/j.jcmg.2021.03.028] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 03/01/2021] [Accepted: 03/22/2021] [Indexed: 01/13/2023]
Abstract
The majority of coronary atherothrombotic events presenting as myocardial infarction (MI) occur as a result of plaque rupture or erosion. Understanding the evolution from a stable plaque into a life-threatening, high-risk plaque is required for advancing clinical approaches to predict atherothrombotic events, and better treat coronary atherosclerosis. Unfortunately, none of the coronary imaging approaches used in clinical practice can reliably predict which plaques will cause an MI. Currently used imaging techniques mostly identify morphological features of plaques, but are not capable of detecting essential molecular characteristics known to be important drivers of future risk. To address this challenge, engineers, scientists, and clinicians have been working hand-in-hand to advance a variety of multimodality intravascular imaging techniques, whereby 2 or more complementary modalities are integrated into the same imaging catheter. Some of these have already been tested in early clinical studies, with other next-generation techniques also in development. This review examines these emerging hybrid intracoronary imaging techniques and discusses their strengths, limitations, and potential for clinical translation from both an engineering and clinical perspective.
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Affiliation(s)
- Jiawen Li
- Adelaide Medical School, University of Adelaide, Adelaide, Australia; Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, Adelaide, Australia; Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, Australia
| | - Nicholas J Montarello
- Department of Cardiology, Central Adelaide Local Health Network, Adelaide, Australia
| | - Ayla Hoogendoorn
- Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, Adelaide, Australia; Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, Australia; Vascular Research Centre, Heart and Vascular Program, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, Australia
| | - Johan W Verjans
- Adelaide Medical School, University of Adelaide, Adelaide, Australia; Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, Adelaide, Australia; Department of Cardiology, Central Adelaide Local Health Network, Adelaide, Australia; Vascular Research Centre, Heart and Vascular Program, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, Australia
| | - Christina A Bursill
- Adelaide Medical School, University of Adelaide, Adelaide, Australia; Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, Adelaide, Australia; Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, Australia; Vascular Research Centre, Heart and Vascular Program, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, Australia
| | | | - Stephen J Nicholls
- Monash Cardiovascular Research Centre, Victorian Heart Institute, Monash University, Melbourne, Australia
| | - Robert A McLaughlin
- Adelaide Medical School, University of Adelaide, Adelaide, Australia; Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, Adelaide, Australia; Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, Australia
| | - Peter J Psaltis
- Adelaide Medical School, University of Adelaide, Adelaide, Australia; Department of Cardiology, Central Adelaide Local Health Network, Adelaide, Australia; Vascular Research Centre, Heart and Vascular Program, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, Australia.
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11
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Nishimiya K, Tearney G. Micro Optical Coherence Tomography for Coronary Imaging. Front Cardiovasc Med 2021; 8:613400. [PMID: 33842560 PMCID: PMC8032864 DOI: 10.3389/fcvm.2021.613400] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 02/23/2021] [Indexed: 01/11/2023] Open
Abstract
Intravascular optical coherence tomography (IVOCT) that produces images with 10 μm resolution has emerged as a significant technology for evaluating coronary architectural morphology. Yet, many features that are relevant to coronary plaque pathogenesis can only be seen at the cellular level. This issue has motivated the development of a next-generation form of OCT imaging that offers higher resolution. One such technology that we review here is termed micro-OCT (μOCT) that enables the assessment of the cellular and subcellular morphology of human coronary atherosclerotic plaques. This chapter reviews recent advances and ongoing works regarding μOCT in the field of cardiology. This new technology has the potential to provide researchers and clinicians with a tool to better understand the natural history of coronary atherosclerosis, increase plaque progression prediction capabilities, and better assess the vessel healing process after revascularization therapy.
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Affiliation(s)
- Kensuke Nishimiya
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, United States.,Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Guillermo Tearney
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, United States.,Department of Pathology, Massachusetts General Hospital, Boston, MA, United States.,Harvard-Massachusetts Institute of Technology (MIT) Division of Health Sciences and Technology Division, Cambridge, MA, United States
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Okoro C, Cunningham CR, Baillargeon AR, Wartak A, Tearney GJ. Modeling, optimization, and validation of an extended-depth-of-field optical coherence tomography probe based on a mirror tunnel. APPLIED OPTICS 2021; 60:2393-2399. [PMID: 33690340 DOI: 10.1364/ao.420591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
The diagnostic capability of high-resolution optical coherence tomography (OCT) may be enhanced by using extended depth-of-field (EDOF) imaging that retains high transverse resolution over long depths. A recently developed mirror-tunnel optical probe design (single-mode fiber to multimode fiber to lens structure) that generates coaxially focused modes has been previously shown to enable EDOF for endoscopic OCT applications. Here, we present ray-tracing optical modeling of this optical configuration, which has the potential to guide performance improvement through optimization. The Huygens wave propagation of the field was traced through probe components with initial lengths. The irradiance along the x-z plane was analyzed, yielding an average full width at half-maximum (FWHM) of 9 µm over a 640 µm DOF (defined as the axial range over which the beam's transverse FWHM is maintained). A custom merit function was then defined, based on the focal region illumination intensity profile that yielded the maximum possible depth having a constrained FWHM size. An orthogonal gradient descent optimization algorithm was then applied using this merit function, using the multimode fiber, spacer, and lens lengths as variables. Optimization resulted in a modeled mean 6 µm FWHM spot diameter over an EDOF of 1 mm. Following optimization, a probe was fabricated, and was validated using a custom-built near-field scanning pinhole beam profiler. The experimental results (6 µm mean FWHM over 800 µm EDOF) showed reasonable correspondence to the simulated predictions, demonstrating the potential utility of optical modeling and optimization for improving EDOF performance in mirror-tunnel endoscopic OCT probes.
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Nishimiya K, Matsumoto Y, Shimokawa H. Recent Advances in Vascular Imaging. Arterioscler Thromb Vasc Biol 2020; 40:e313-e321. [PMID: 33054393 DOI: 10.1161/atvbaha.120.313609] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Recent advances in vascular imaging have enabled us to uncover the underlying mechanisms of vascular diseases both ex vivo and in vivo. In the past decade, efforts have been made to establish various methodologies for evaluation of atherosclerotic plaque progression and vascular inflammatory changes in addition to biomarkers and clinical manifestations. Several recent publications in Arteriosclerosis, Thrombosis, and Vascular Biology highlighted the essential roles of in vivo and ex vivo vascular imaging, including magnetic resonance image, computed tomography, positron emission tomography/scintigraphy, ultrasonography, intravascular ultrasound, and most recently, optical coherence tomography, all of which can be used in bench and clinical studies at relative ease. With new methods proposed in several landmark studies, these clinically available imaging modalities will be used in the near future. Moreover, future development of intravascular imaging modalities, such as optical coherence tomography-intravascular ultrasound, optical coherence tomography-near-infrared autofluorescence, polarized-sensitive optical coherence tomography, and micro-optical coherence tomography, are anticipated for better management of patients with cardiovascular disease. In this review article, we will overview recent advances in vascular imaging and ongoing works for future developments.
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Affiliation(s)
- Kensuke Nishimiya
- From the Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yasuharu Matsumoto
- From the Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroaki Shimokawa
- From the Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
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Matyushkin Y, Danilov S, Moskotin M, Belosevich V, Kaurova N, Rybin M, Obraztsova ED, Fedorov G, Gorbenko I, Kachorovskii V, Ganichev S. Helicity-Sensitive Plasmonic Terahertz Interferometer. NANO LETTERS 2020; 20:7296-7303. [PMID: 32903004 DOI: 10.1021/acs.nanolett.0c02692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Plasmonic interferometry is a rapidly growing area of research with a huge potential for applications in the terahertz frequency range. In this Letter, we explore a plasmonic interferometer based on graphene field effect transistor connected to specially designed antennas. As a key result, we observe helicity- and phase-sensitive conversion of circularly polarized radiation into dc photovoltage caused by the plasmon-interference mechanism: two plasma waves, excited at the source and drain part of the transistor, interfere inside the channel. The helicity-sensitive phase shift between these waves is achieved by using an asymmetric antenna configuration. The dc signal changes sign with inversion of the helicity. A suggested plasmonic interferometer is capable of measuring the phase difference between two arbitrary phase-shifted optical signals. The observed effect opens a wide avenue for phase-sensitive probing of plasma wave excitations in two-dimensional materials.
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Affiliation(s)
- Yakov Matyushkin
- Moscow Institute of Physics and Technology, National Research University, 141700 Dolgoprudny, Russia
- Terahertz Center, University of Regensburg, D-93053 Regensburg, Germany
- Physics Department, Moscow State Pedagogical University, 119435 Moscow, Russia
- National Research University Higher School of Economics, 101000 Moscow, Russia
| | - Sergey Danilov
- Terahertz Center, University of Regensburg, D-93053 Regensburg, Germany
| | - Maxim Moskotin
- Moscow Institute of Physics and Technology, National Research University, 141700 Dolgoprudny, Russia
- Physics Department, Moscow State Pedagogical University, 119435 Moscow, Russia
| | - Vsevolod Belosevich
- Moscow Institute of Physics and Technology, National Research University, 141700 Dolgoprudny, Russia
- Physics Department, Moscow State Pedagogical University, 119435 Moscow, Russia
| | - Natalia Kaurova
- Physics Department, Moscow State Pedagogical University, 119435 Moscow, Russia
| | - Maxim Rybin
- Moscow Institute of Physics and Technology, National Research University, 141700 Dolgoprudny, Russia
- Prokhorov General Physics Institute, RAS, 119991 Moscow, Russia
| | - Elena D Obraztsova
- Moscow Institute of Physics and Technology, National Research University, 141700 Dolgoprudny, Russia
- Prokhorov General Physics Institute, RAS, 119991 Moscow, Russia
| | - Georgy Fedorov
- Moscow Institute of Physics and Technology, National Research University, 141700 Dolgoprudny, Russia
- Physics Department, Moscow State Pedagogical University, 119435 Moscow, Russia
| | - Ilya Gorbenko
- Ioffe Institute, 194021 St. Petersburg, Russia
- ITMO University, 197101 St. Petersburg, Russia
| | - Valentin Kachorovskii
- Ioffe Institute, 194021 St. Petersburg, Russia
- CENTERA Laboratories, Institute of High Pressure Physics, PAS, 01-142 Warsaw, Poland
| | - Sergey Ganichev
- Terahertz Center, University of Regensburg, D-93053 Regensburg, Germany
- CENTERA Laboratories, Institute of High Pressure Physics, PAS, 01-142 Warsaw, Poland
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Aborahama Y, Dorrah AH, Mojahedi M. Designing the phase and amplitude of scalar optical fields in three dimensions. OPTICS EXPRESS 2020; 28:24721-24730. [PMID: 32907006 DOI: 10.1364/oe.397119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
The ability to generate any arbitrarily chosen optical field in a three-dimensional (3D) space, in the absence of any sources, without modifying the index of refraction, remains an elusive but much-desired capability with applications in various fields such as optical micromanipulation, imaging, and data communications, to name a few. In this work, we show analytically that it is possible to generate any desired scalar optical field with predefined amplitude and phase in 3D space, where the generated field is an exact duplicate of the desired field in case it is a solution of Helmholtz wave equation, or if the existence of such field is strictly forbidden, the generated field is the closest possible rendition of the desired field in amplitude and phase. The developed analytical approach is further supported via experimental demonstration of optical beams with exotic trajectories and can have a significant impact on the aforementioned application areas.
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Flexible endoscopic micro-optical coherence tomography for three-dimensional imaging of the arterial microstructure. Sci Rep 2020; 10:9248. [PMID: 32514084 PMCID: PMC7280224 DOI: 10.1038/s41598-020-65742-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 05/06/2020] [Indexed: 12/18/2022] Open
Abstract
Micro-optical coherence tomography (µOCT) is a novel imaging approach enabling visualization of the microstructures of biological tissues at a cellular or sub-cellular level. However, it has been challenging to develop a miniaturized flexible endoscopic µOCT probe allowing helical luminal scanning. In this study, we built a flexible endoscopic µOCT probe with an outer diameter of 1.2 mm, which acquires three-dimensional images of the arterial microstructures via helical scanning with an axial and lateral resolutions of 1.83 µm and 3.38 µm in air, respectively. Furthermore, the depth of focus of the µOCT imaging probe was extended two-fold using a binary phase spatial filter. We demonstrated that the present endoscopic µOCT could image cellular level features of a rabbit artery with high-risk atheroma and a bioresorbable scaffold-implanted swine coronary artery. This highly-translatable endoscopic µOCT will be a useful tool for investigating coronary artery disease and stent biology.
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