生体医工学
Online ISSN : 1881-4379
Print ISSN : 1347-443X
研究
能動的超音波ドップラー法による血流中の栓子と気泡の識別方法の開発.1(水流および模擬血流中で超音波を管軸と垂直に照射する実験)
郡 慎平阿部 裕一松崎 尚洋田地川 勉大場 謙吉
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2009 年 47 巻 1 号 p. 28-35

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An “active” ultrasound Doppler method was newly developed in order to directly and easily discriminate emboli from micro bubbles flowing in blood vessel. The principle of this method is based on measuring the induced velocities of an embolus and a micro bubble by acoustic radiation force of ultrasound wave. This force is mainly influenced by the difference in characteristic acoustic impedances between emboli or bubbles and ambient fluid. In order to prove the availability of this new discrimination method, micro bubbles, model emboli and the other particles were irradiated by ultrasound wave from a commercial ultrasound diagnostic equipment. Every motion was observed by a high speed video camera and their velocities along sound axis were measured. As a result, it was found that micro bubbles were strongly moved with a velocity along the axis in steady flow while model emboli were hardly moved, and that this “active” ultrasound Doppler method had high availability for a medical diagnosis system to discriminate emboli from micro bubbles flowing in human vessel.

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© 2009 社団法人日本生体医工学会
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