Search Results - "Arakawa, Mototaka"

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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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

“…Abstract 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

“…Abstract Improving the accuracy of heart wall motion measurement is essential to realise better cardiac function evaluation. This paper proposed a…”
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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

“…Abstract The in vivo measurement of the contractile response caused by electrical excitation has been studied to detect myocardial ischemia in its early…”
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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

“…Abstract Studies to investigate the ultrasound elasticity measurement of the carotid artery, for early detection of arteriosclerosis, are ongoing. In the…”
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Estimation error in sound velocity depending on size of target scatterer by Nakayama, Aoi, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…Abstract The quality of ultrasonic images can be improved by estimating the sound velocity accurately. Our previous study proposed a method to estimate the…”
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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

“…Abstract Improving spatial resolution is a crucial issue in medical ultrasound. One of the improving methods is the post-processing of the received ultrasound…”
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Quantification of limitations in statistical analysis of ultrasound echo envelope amplitudes by Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi, Hachiya, Hiroyuki

“…Abstract Ultrasound echo envelope statistics have been widely studied for quantitative tissue characterization. In ultrasound measurements, the size of the…”
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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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Evaluation of error factors depending on ultrasonic transmitted beamwidth in measurement of myocardial minute velocity by Sugahara, Kana, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…Abstract A measurement by transmitting ultrasonic non-focusing beams increases the temporal resolution but causes an error in the velocity measurements because…”
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Local two-dimensional distribution of propagation speed of myocardial contraction for ultrasonic visualization of contraction propagation by Hayashi, Akane, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…The propagation of myocardial contraction caused by the conduction of electrical excitation in the heart has been visualized in our previous study. However, it…”
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Internal pressure dependence on viscoelasticity of arterial wall by ultrasonic measurement by Suzuki, Saki, Mori, Shohei, Iwai-Takano, Masumi, Arakawa, Mototaka, Kanai, Hiroshi

“…Abstract Previously, we proposed an ultrasonic measurement method of arterial wall elasticity for the early detection of arteriosclerosis. Since vascular wall…”
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Estimation method for sound velocity distribution for high-resolution ultrasonic tomographic imaging by Abe, Keiichiro, Arakawa, Mototaka, Kanai, Hiroshi

“…Purpose With commercial ultrasonic equipment, the sound velocity is fixed to a constant value of 1530 or 1540 m/s, which is used for beam formation. However,…”
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Application of low-complexity generalized coherence factor to in vivo data by Hisatsu, Masanori, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…Purpose Beamforming using the generalized coherence factor (GCF) reduces sidelobe artifacts and provides an excellent contrast-to-noise ratio. We previously…”
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Development of an ultrasonic probe to measure both radial arterial pressure and diameter change at the same position for early diagnosis of vascular endothelial function: Preliminary study by Arakawa, Mototaka, Saito, Takumi, Mori, Shohei, Ohba, Shigeo, Kobayashi, Kazuto, Kanai, Hiroshi

“…[Display omitted] •A linear array ultrasonic probe was customized.•Blood pressure and arterial diameter change were measured by the ultrasonic…”
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A new evaluation method for dependence of width of transmitted waves on accuracy in multipoint simultaneous ultrasonic measurements of cardiac wall vibration waveform by Furusawa, Naoya, Mori, Shohei, Arakawa, Mototaka, Kanai, Hiroshi

“…It has been revealed that the ultrasound measurement with high temporal resolution is useful for diagnosis of myocardial tissue properties. However, it is…”
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Estimation of viscoelasticity of radial artery via simultaneous measurement of changes in pressure and diameter using a single ultrasound probe by Saito, Takumi, Mori, Shohei, Arakawa, Mototaka, Ohba, Shigeo, Kobayashi, Kazuto, Kanai, Hiroshi

“…To establish an evaluation index for vascular endothelial function, we developed an ultrasonic probe that can measure changes in blood pressure and blood…”
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