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Vitouš J, Jiřík R, Stračina T, Hendrych M, Nádeníček J, Macíček O, Tian Y, Krátká L, Dražanová E, Nováková M, Babula P, Panovský R, DiBella E, Starčuk Z. T1 mapping of myocardium in rats using self-gated golden-angle acquisition. Magn Reson Med 2024; 91:368-380. [PMID: 37811699 DOI: 10.1002/mrm.29846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 07/19/2023] [Accepted: 08/10/2023] [Indexed: 10/10/2023]
Abstract
PURPOSE The aim of this study is to design a method of myocardial T1 quantification in small laboratory animals and to investigate the effects of spatiotemporal regularization and the needed acquisition duration. METHODS We propose a compressed-sensing approach to T1 quantification based on self-gated inversion-recovery radial two/three-dimensional (2D/3D) golden-angle stack-of-stars acquisition with image reconstruction performed using total-variation spatiotemporal regularization. The method was tested on a phantom and on a healthy rat, as well as on rats in a small myocardium-remodeling study. RESULTS The results showed a good match of the T1 estimates with the results obtained using the ground-truth method on a phantom and with the literature values for rats myocardium. The proposed 2D and 3D methods showed significant differences between normal and remodeling myocardium groups for acquisition lengths down to approximately 5 and 15 min, respectively. CONCLUSIONS A new 2D and 3D method for quantification of myocardial T1 in rats was proposed. We have shown the capability of both techniques to distinguish between normal and remodeling myocardial tissue. We have shown the effects of image-reconstruction regularization weights and acquisition length on the T1 estimates.
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Affiliation(s)
- Jiří Vitouš
- Institute of Scientific Instruments, Czech Academy of Sciences, Brno, Czechia
- Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czechia
| | - Radovan Jiřík
- Institute of Scientific Instruments, Czech Academy of Sciences, Brno, Czechia
| | - Tibor Stračina
- Department of Physiology, Masaryk University, Faculty of Medicine, Brno, Czechia
| | - Michal Hendrych
- First Department of Pathology, St. Anne's University Hospital and Faculty of Medicine Masaryk University, Brno, Czechia
| | - Jaroslav Nádeníček
- Department of Physiology, Masaryk University, Faculty of Medicine, Brno, Czechia
| | - Ondřej Macíček
- Institute of Scientific Instruments, Czech Academy of Sciences, Brno, Czechia
| | - Ye Tian
- Viterbi School of Engineering, University of Southern California, Los Angeles, California, USA
| | - Lucie Krátká
- Institute of Scientific Instruments, Czech Academy of Sciences, Brno, Czechia
| | - Eva Dražanová
- Institute of Scientific Instruments, Czech Academy of Sciences, Brno, Czechia
- Department of Pharmacology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Marie Nováková
- Department of Physiology, Masaryk University, Faculty of Medicine, Brno, Czechia
| | - Petr Babula
- Department of Physiology, Masaryk University, Faculty of Medicine, Brno, Czechia
| | - Roman Panovský
- International Clinical Research Center, St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Brno, Czechia
- 1st Department of Internal Medicine/Cardioangiology, St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Edward DiBella
- School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Zenon Starčuk
- Institute of Scientific Instruments, Czech Academy of Sciences, Brno, Czechia
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2
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Abstract
Major advances in biomedical imaging have occurred over the last 2 decades and now allow many physiological, cellular, and molecular processes to be imaged noninvasively in small animal models of cardiovascular disease. Many of these techniques can be also used in humans, providing pathophysiological context and helping to define the clinical relevance of the model. Ultrasound remains the most widely used approach, and dedicated high-frequency systems can obtain extremely detailed images in mice. Likewise, dedicated small animal tomographic systems have been developed for magnetic resonance, positron emission tomography, fluorescence imaging, and computed tomography in mice. In this article, we review the use of ultrasound and positron emission tomography in small animal models, as well as emerging contrast mechanisms in magnetic resonance such as diffusion tensor imaging, hyperpolarized magnetic resonance, chemical exchange saturation transfer imaging, magnetic resonance elastography and strain, arterial spin labeling, and molecular imaging.
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Affiliation(s)
- David E Sosnovik
- Cardiology Division, Cardiovascular Research Center (D.E.S.), Massachusetts General Hospital and Harvard Medical School, Boston.,A.A. Martinos Center for Biomedical Imaging (D.E.S.), Massachusetts General Hospital and Harvard Medical School, Boston.,Harvard-MIT Program in Health Sciences and Technology, Harvard Medical School and Massachusetts Institute of Technology, Cambridge (D.E.S.)
| | - Marielle Scherrer-Crosbie
- Cardiology Division, Hospital of the University of Pennsylvania and Perelman School of Medicine, Philadelphia (M.S.-C)
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Nakamori S, Ngo LH, Rodriguez J, Neisius U, Manning WJ, Nezafat R. T 1 Mapping Tissue Heterogeneity Provides Improved Risk Stratification for ICDs Without Needing Gadolinium in Patients With Dilated Cardiomyopathy. JACC Cardiovasc Imaging 2020; 13:1917-1930. [PMID: 32653543 DOI: 10.1016/j.jcmg.2020.03.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 02/27/2020] [Accepted: 03/27/2020] [Indexed: 12/26/2022]
Abstract
OBJECTIVES This study sought to determine whether myocardial tissue heterogeneity scanned by native T1 mapping could improve risk stratification in patients with nonischemic dilated cardiomyopathy (NICM) evaluated for primary prevention by ICD. BACKGROUND The benefit of insertable cardiac-defibrillator (ICD) as primary prevention ICD in patients with NICM remains to be fully clarified. METHODS A total of 115 NICM candidates for primary prevention and 55 healthy controls with similar distributions of age and sex were prospectively enrolled. Imaging was performed at 1.5-T using a protocol that included cine magnetic resonance for left ventricular function, late gadolinium enhancement (LGE) for focal scarring, and 5-slice native T1 mapping for diffuse fibrosis and heterogeneity. The last method was assessed by mean absolute deviation of the segmental pixel-SD from the average pixel-SD (Mad-SD). The primary endpoint was a composite of appropriate ICD therapy and sudden cardiac death. RESULTS During a median follow-up of 24 months, 13 patients (11%) experienced the primary endpoint. Dichotomized Mad-SD >0.24 provided a comparable outcome to the presence of LGE for the primary endpoint (annual event rate: 9.8% vs. 10.9%). The integration of Mad-SD to global native T1 showed excellent arrhythmic event-free survival (annual event rate: 0%), and high sensitivity of 85% (95% confidence interval [CI]: 55% to 98%) and moderate specificity of 72% (95% CI: 62% to 80%), with a C-statistic of 0.76 (95% CI: 0.64 to 0.87), which was comparable to the presence, location, or extent of LGE in its ability to predict arrhythmic events. CONCLUSIONS Combined myocardium tissue heterogeneity and interstitial fibrosis assessment by native T1 mapping is an important predictor of ventricular tachycardia and ventricular fibrillation and provides additive risk stratification for primary prevention ICD in NICM patients without the need for gadolinium contrast.
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Affiliation(s)
- Shiro Nakamori
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Long H Ngo
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Jennifer Rodriguez
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Ulf Neisius
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Warren J Manning
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts; Radiology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Reza Nezafat
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts.
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Yu Y, Liu H, Yang D, He F, Yuan Y, Guo J, Hu J, Yu J, Yan X, Wang S, Du Z. Aloe-emodin attenuates myocardial infarction and apoptosis via up-regulating miR-133 expression. Pharmacol Res 2019; 146:104315. [PMID: 31207343 DOI: 10.1016/j.phrs.2019.104315] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/29/2019] [Accepted: 06/13/2019] [Indexed: 12/20/2022]
Abstract
Aloe-emodin (AE) is an anthraquinone derived from rhubarb and has a variety of pharmacological actions. However, the role of AE in regulating ischemic heart diseases is still unclear. The present study investigated the effect of AE on cardiac injuries induced by myocardial infarction (MI) in vivo and oxidative insults in vitro and explored the mechanisms involved. TUNEL and Flow cytometry were performed to measure cell apoptosis. Western blot analysis was employed to detect expression of Bcl-2, Bax and Caspase-3 proteins. Real-time PCR was used to quantify the microRNAs levels. Our data showed that AE protected neonatal rat ventricular myocytes (NRVMs) from hydrogen peroxide (H2O2) induced apoptosis and significantly inhibited H2O2-induced reactive oxygen species (ROS) elevation. Furthermore, AE treatment significantly reversed H2O2-induced upregulation of Bax/Bcl-2 and the loss of mitochondrial membrane potential. In vivo, AE treatment significantly reduced infarct size, ameliorated impaired cardiac function and obviously decreased cardiac apoptosis and oxidative stress in MI mice heart. Meanwhile, AE restored H2O2-induced downregulation of miR-133, and transfection with miR-133 inhibitor abolished the anti-apoptotic and anti-oxidative effects of AE. Moreover, AE prevented H2O2-induced increase in caspase-3 activity, which was diminished by application of miR-133 inhibitor. Our results indicate that AE protectes against myocardial infarction via the upregulation of miR-133, inhibition of ROS production and suppression of caspase-3 apoptotic signaling pathway.
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Affiliation(s)
- Yang Yu
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China
| | - Huibin Liu
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China
| | - Di Yang
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China
| | - Fang He
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China
| | - Ye Yuan
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China
| | - Jing Guo
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China
| | - Juan Hu
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China
| | - Jie Yu
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China
| | - Xiuqing Yan
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China
| | - Shuo Wang
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Zhimin Du
- Institute of Clinical Pharmacy, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin 150086, China; Department of Clinical Pharmarcology, College of Pharmacy, Harbin Medical University, Harbin 150086, China; State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau, PR China.
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Radial MP2RAGE sequence for rapid 3D T 1 mapping of mouse abdomen: application to hepatic metastases. Eur Radiol 2019; 29:5844-5851. [PMID: 30888483 DOI: 10.1007/s00330-019-06081-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 01/22/2019] [Accepted: 02/07/2019] [Indexed: 10/27/2022]
Abstract
OBJECTIVES The T1 longitudinal recovery time is regarded as a biomarker of cancer treatment efficiency. In this scope, the Magnetization Prepared 2 RApid Gradient Echo (MP2RAGE) sequence relevantly complies with fast 3D T1 mapping. Nevertheless, with its Cartesian encoding scheme, it is very sensitive to respiratory motion. Consequently, a radial encoding scheme was implemented for the detection and T1 measurement of hepatic metastases in mice at 7T. METHODS A 3D radial encoding scheme was developed using a golden angle distribution for the k-space trajectories. As in that case, each projection contributes to the image contrast, the signal equations had to be modified. Phantoms containing increasing gadoteridol concentrations were used to determine the accuracy of the sequence in vitro. Healthy mice were repetitively scanned to assess the reproducibility of the T1 values. The growth of hepatic metastases was monitored. Undersampling robustness was also evaluated. RESULTS The accuracy of the T1 values obtained with the radial MP2RAGE sequence was > 90% compared to the Inversion-Recovery sequence. The motion robustness of this new sequence also enabled repeatable T1 measurements on abdominal organs. Hepatic metastases of less than 1-mm diameter were easily detected and T1 heterogeneities within the metastasis and between the metastases within the same animal were measured. With a twofold acceleration factor using undersampling, high-quality 3D T1 abdominal maps were achieved in 9 min. CONCLUSIONS The radial MP2RAGE sequence could be used for fast 3D T1 mapping, to detect and characterize metastases in regions subjected to respiratory motion. KEY POINTS • The Cartesian encoding of the MP2RAGE sequence was modified to a radial encoding. The modified sequence enabled accurate T 1 measurements on phantoms and on abdominal organs of mice. • Hepatic metastases were easily detected due to high contrast. Heterogeneity in T 1 was measured within the metastases and between each metastasis within the same animal. • As implementation of this sequence does not require specific hardware, we expect that it could be readily available for clinical practice in humans.
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Zhu Y, Kang J, Duan C, Nezafat M, Neisius U, Jang J, Nezafat R. Integrated motion correction and dictionary learning for free‐breathing myocardial T
1
mapping. Magn Reson Med 2018; 81:2644-2654. [DOI: 10.1002/mrm.27579] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 09/27/2018] [Accepted: 10/02/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Yanjie Zhu
- Department of Medicine (Cardiovascular Division)Beth Israel Deaconess Medical Center and Harvard Medical School Boston Massachusetts
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences Shenzhen China
| | - Jinkyu Kang
- Department of Medicine (Cardiovascular Division)Beth Israel Deaconess Medical Center and Harvard Medical School Boston Massachusetts
| | - Chong Duan
- Department of Medicine (Cardiovascular Division)Beth Israel Deaconess Medical Center and Harvard Medical School Boston Massachusetts
| | - Maryam Nezafat
- Department of Medicine (Cardiovascular Division)Beth Israel Deaconess Medical Center and Harvard Medical School Boston Massachusetts
| | - Ulf Neisius
- Department of Medicine (Cardiovascular Division)Beth Israel Deaconess Medical Center and Harvard Medical School Boston Massachusetts
| | - Jihye Jang
- Department of Medicine (Cardiovascular Division)Beth Israel Deaconess Medical Center and Harvard Medical School Boston Massachusetts
- Department of Computer ScienceTechnical University of Munich Munich Germany
| | - Reza Nezafat
- Department of Medicine (Cardiovascular Division)Beth Israel Deaconess Medical Center and Harvard Medical School Boston Massachusetts
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Ramos IT, Henningsson M, Nezafat M, Lavin B, Lorrio S, Gebhardt P, Protti A, Eykyn TR, Andia ME, Flögel U, Phinikaridou A, Shah AM, Botnar RM. Simultaneous Assessment of Cardiac Inflammation and Extracellular Matrix Remodeling after Myocardial Infarction. Circ Cardiovasc Imaging 2018; 11:e007453. [PMID: 30524648 PMCID: PMC6277008 DOI: 10.1161/circimaging.117.007453] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 08/04/2018] [Indexed: 01/25/2023]
Abstract
Background Optimal healing of the myocardium following myocardial infarction (MI) requires a suitable degree of inflammation and its timely resolution, together with a well-orchestrated deposition and degradation of extracellular matrix (ECM) proteins. Methods and Results MI and SHAM-operated animals were imaged at 3,7,14 and 21 days with 3T magnetic resonance imaging (MRI) using a 19F/1H surface coil. Mice were injected with 19F-perfluorocarbon (PFC) nanoparticles to study inflammatory cell recruitment, and with a gadolinium-based elastin-binding contrast agent (Gd-ESMA) to evaluate elastin content. 19F MRI signal co-localized with infarction areas, as confirmed by late-gadolinium enhancement, and was highest 7days post-MI, correlating with macrophage content (MAC-3 immunohistochemistry) (ρ=0.89,P<0.0001). 19F quantification with in vivo (MRI) and ex vivo nuclear magnetic resonance (NMR) spectroscopy correlated linearly (ρ=0.58,P=0.020). T1 mapping after Gd-ESMA injection showed increased relaxation rate (R1) in the infarcted regions and was significantly higher at 21days compared with 7days post-MI (R1[s-1]:21days=2.8 [IQR,2.69-3.30] vs 7days=2.3 [IQR,2.12-2.5], P<0.05), which agreed with an increased tropoelastin content (ρ=0.89, P<0.0001). The predictive value of each contrast agent for beneficial remodeling was evaluated in a longitudinal proof-of-principle study. Neither R1 nor 19F at day 7 were significant predictors for beneficial remodeling (P=0.68;P=0.062). However, the combination of both measurements (R1<2.34Hz and 0.55≤19F≤1.85) resulted in an odds ratio of 30.0 (CI95%:1.41-638.15;P=0.029) for favorable post-MI remodeling. Conclusions Multinuclear 1H/19F MRI allows the simultaneous assessment of inflammation and elastin remodeling in a murine MI model. The interplay of these biological processes affects cardiac outcome and may have potential for improved diagnosis and personalized treatment.
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Affiliation(s)
- Isabel T Ramos
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- School of Cardiovascular Medicine and Sciences, King's College London British Heart Foundation Centre of Excellence, London, United Kingdom
| | - Markus Henningsson
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Maryam Nezafat
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Begoña Lavin
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- School of Cardiovascular Medicine and Sciences, King's College London British Heart Foundation Centre of Excellence, London, United Kingdom
| | - Silvia Lorrio
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- School of Cardiovascular Medicine and Sciences, King's College London British Heart Foundation Centre of Excellence, London, United Kingdom
| | - Pierre Gebhardt
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- Department of Physics of Molecular Imaging Systems, Institute for Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany
| | - Andrea Protti
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Thomas R Eykyn
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Marcelo E Andia
- Radiology Department, School of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Ulrich Flögel
- Department of Molecular Cardiology, Heinrich Heine University Duesseldorf, Duesseldorf, Germany
| | - Alkystis Phinikaridou
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- School of Cardiovascular Medicine and Sciences, King's College London British Heart Foundation Centre of Excellence, London, United Kingdom
| | - Ajay M Shah
- School of Cardiovascular Medicine and Sciences, King's College London British Heart Foundation Centre of Excellence, London, United Kingdom
| | - René M Botnar
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
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Takahashi Y, Saito S. [5. Evaluation of Pathology of Heart Disease Models Using Preclinical Ultra-high Field MRI]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2018; 74:404-411. [PMID: 29681609 DOI: 10.6009/jjrt.2018_jsrt_74.4.404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yusuke Takahashi
- Department of Cardiovascular Medicine, Graduate School of Medicine, Osaka University
| | - Shigeyoshi Saito
- Department of Medical Physics and Engineering, Division of Health Sciences, Graduate School of Medicine, Osaka University
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