Spatial Distribution Measurement of Heart Wall Vibrations Generated by Remote Perturbation of Inner Pressure
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概要
- 論文の詳細を見る
It is essential for the diagnosis of heart diseases to noninvasively measure instantaneous myocardial movability and transition properties during one cardiac cycle. This study proposes a novel method of noninvasively perturbing left ventricle (LV) internal pressure by remotely actuating the brachium artery with sinusoidal vibration for the diagnosis of myocardial movability. By attaching an actuator to the brachium artery and driving it with a sinusoidal wave of $ f_{0}$ Hz, the internal pressure of the artery is perturbed. The perturbation propagates along the artery to the LV of the heart and the sinusoidal perturbation of the LV internal pressure is induced. Using an ultrasound-based phased tracking method, the resultant minute motion of the heart wall can be noninvasively measured. Because the vibration mode of the heart wall depends on actuation frequency, by phantom experiments using a spherical shell made of silicone rubber, to which a silicone rubber tube is connected, the vibration mode was identified from the measurement of the spatial distribution of the motions by scanning with an ultrasonic beam. From an in vivo experiment, the principle of remote actuation was confirmed.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-05-30
著者
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HASEGAWA Hideyuki
Department of Biomedical Engineering, Graduate School of Biomedical Engineering, Tohoku University
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Kanai Hiroshi
Department Of Electrical Engineering Faculty Of Engineering Tohoku University
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Hasegawa Hideyuki
Department of Electronic Engineering, Graduate School of Engineering, Tohoku University, Aramaki-aza-Aoba 6-6-05, Sendai 980-8579, Japan
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Imamura Kohsuke
Department of Electronic Engineering, Graduate School of Engineering, Tohoku University, Aramaki-aza-Aoba 6-6-05, Sendai 980-8579, Japan
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