Search Results - "KANAI, Hiroshi"

Propagation of Vibration Caused by Electrical Excitation in the Normal Human Heart by Kanai, Hiroshi

“…Abstract The ability to noninvasively detect regional dynamic myocardial damage related to action potentials and mechanical properties affected by heart…”
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High-frame-rate echocardiography using diverging transmit beams and parallel receive beamforming by Hasegawa, Hideyuki, Kanai, Hiroshi

“…Purpose Echocardiography is a widely used modality for diagnosis of the heart. It enables observation of the shape of the heart and estimation of global heart…”
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Lateral M-Mode: Ultrasound Visualization of Displacement Along Longitudinal Direction at Intima–Media Complex by Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…Quantification of the dynamics of the carotid artery wall is useful in evaluating arteriosclerosis and atherosclerosis. As the carotid artery wall moves not…”
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Effect of subaperture beamforming on phase coherence imaging by Hasegawa, Hideyuki, Kanai, Hiroshi

“…High-frame-rate echocardiography using unfocused transmit beams and parallel receive beamforming is a promising method for evaluation of cardiac function, such…”
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Appropriate Window Function and Window Length in Multifrequency Velocity Estimator for Rapid Motion and Locality of Layered Myocardium by Obara, Yu, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…The heart wall has a multilayered structure and moves rapidly during ejection and rapid filling periods. Local strain rate (SR) measurements of each myocardial…”
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Multifrequency Phased Tracking Method for Estimating Velocity in Heart Wall by Obara, Yu, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…Local high-accuracy velocity estimation is important for the ultrasound-based evaluation of regional myocardial function. The ultrasound phase difference at…”
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Ultrasonic measurement of thickness of carotid arterial wall using its natural longitudinal displacement by Nagai, Yoshifumi, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…The thickness of the carotid arterial wall obtained from B-mode imaging using ultrasonic diagnostic devices is widely used for the diagnosis of…”
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Speed-of-sound estimation in ultrasound propagation medium by considering size of target scatterer by Mori, Shohei, Kanai, Hiroshi, Arakawa, Mototaka

“…Purpose Accurate speed-of-sound (SoS) estimation in an ultrasound propagation medium improves imaging quality and contributes to better diagnosis of diseases…”
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High-speed measurement of two-dimensional displacement of myocardium using element RF data of ultrasonic probe by Hara, Kaisei, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…Improving the accuracy of heart wall motion measurement is essential to realise better cardiac function evaluation. This paper proposed a two-dimensional (2D)…”
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Effect of element directivity on adaptive beamforming applied to high-frame-rate ultrasound by Hasegawa, Hideyuki, Kanai, Hiroshi

“…High-frame-rate ultrasound is a promising technique for measurement and imaging of cardiovascular dynamics. In high-frame-rate ultrasonic imaging, unfocused…”
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Measurement of propagation of local and minute contractile response in layered myocardium by Obara, Yu, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…The in vivo measurement of the contractile response caused by electrical excitation has been studied to detect myocardial ischemia in its early stages. In the…”
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A randomized, double-blind, placebo-controlled pilot trial of low-intensity pulsed ultrasound therapy for refractory angina pectoris by Shindo, Tomohiko, Ito, Kenta, Ogata, Tsuyoshi, Kurosawa, Ryo, Eguchi, Kumiko, Kagaya, Yuta, Hanawa, Kenichiro, Hasebe, Yuhi, Nishimiya, Kensuke, Shiroto, Takashi, Takahashi, Jun, Okumura, Yasuo, Noguchi, Teruo, Ozaki, Yukio, Daida, Hiroyuki, Hagiwara, Nobuhisa, Masuyama, Tohru, Chikamori, Taishiro, Fukumoto, Yoshihiro, Tsujita, Kenichi, Kanai, Hiroshi, Yasuda, Satoshi, Shimokawa, Hiroaki

“…Despite the advances in the treatment of cardiovascular diseases, effective treatment remains to be established to improve the quality of life and prognosis of…”
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Estimation error in sound velocity depending on size of target scatterer by Nakayama, Aoi, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…The quality of ultrasonic images can be improved by estimating the sound velocity accurately. Our previous study proposed a method to estimate the sound…”
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Accuracy verification in ultrasonic elasticity measurement within intima-media complex visible range using phantom experimental system by Akiyama, Seira, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…Studies to investigate the ultrasound elasticity measurement of the carotid artery, for early detection of arteriosclerosis, are ongoing. In the long-axis…”
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Quantification of limitations in statistical analysis of ultrasound echo envelope amplitudes by Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi, Hachiya, Hiroyuki

“…Ultrasound echo envelope statistics have been widely studied for quantitative tissue characterization. In ultrasound measurements, the size of the…”
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Annealing-Assisted Column Generation for Inequality-Constrained Combinatorial Optimization Problems by Kanai, Hiroshi, Yamashita, Masashi, Tanahashi, Kotaro, Tanaka, Shu

“…Ising machines are expected to solve combinatorial optimization problems faster than the existing integer programming solvers. These problems, particularly…”
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Improving axial resolution of medical ultrasound images by using noise-robust broadband filter based on singular value decomposition by Kawamata, Kenta, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…Improving spatial resolution is a crucial issue in medical ultrasound. One of the improving methods is the post-processing of the received ultrasound RF…”
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Measurement of viscoelasticity of anisotropic viscoelastic phantom by dual ultrasound excitation by Kawamura, Hibiki, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…An estimation of anisotropic viscoelasticity is important for evaluating muscle lesions. In the previous study, we proposed a method for estimating…”
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Low-intensity pulsed ultrasound therapy promotes recovery from stroke by enhancing angio-neurogenesis in mice in vivo by Ichijo, Sadamitsu, Shindo, Tomohiko, Eguchi, Kumiko, Monma, Yuto, Nakata, Takashi, Morisue, Yoshihiko, Kanai, Hiroshi, Osumi, Noriko, Yasuda, Satoshi, Shimokawa, Hiroaki

“…Since the treatment window of thrombolytic therapy for stroke is limited, new therapy remains to be developed. We have recently developed low-intensity pulsed…”
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Whole-brain low-intensity pulsed ultrasound therapy markedly improves cognitive dysfunctions in mouse models of dementia - Crucial roles of endothelial nitric oxide synthase by Eguchi, Kumiko, Shindo, Tomohiko, Ito, Kenta, Ogata, Tsuyoshi, Kurosawa, Ryo, Kagaya, Yuta, Monma, Yuto, Ichijo, Sadamitsu, Kasukabe, Sachie, Miyata, Satoshi, Yoshikawa, Takeo, Yanai, Kazuhiko, Taki, Hirofumi, Kanai, Hiroshi, Osumi, Noriko, Shimokawa, Hiroaki

“…Therapeutic focused-ultrasound to the hippocampus has been reported to exert neuroprotective effects on dementia. In the present study, we examined whether the…”
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