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英文誌(2004-)

Journal of Medical Ultrasonics

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1995 - Vol.22

Vol.22 No.06

Original Article(原著)

(0439 - 0443)

血流ドプラ信号直接相関による局所脈波速度計測法の簡易モデル水路における基本動作確認

Model Circulation Flow Study in Measuring Local Speed of Pulse-Wave Propagation by Correlating Adjacent Doppler Flow Signals

片倉 景義1, 千田 彰一2, 西谷 智彦2, 弓場 雅夫2, 松尾 裕英2

Kageyoshi KATAKURA1, Shouichi SENDA2, Tomohiko NlSHIYA2, Masao YUBA2, Hirohide MATSUO2

1日立製作所中央研究所, 2香川医科大学第2内科

1Central Research Laboratory Hitachi Ltd. , 2Department of Internal Medicine Kagawa Medical School

キーワード : Coherency, Correlation, Doppler, Pressure-wave velocity

Doppler signals generated by liquid flow were measured at two closely spaced locations along a vessel. The proposed method for measuring local blood pressure pulse-wave propagation speed employs one processing procedure to increase coherency between the two Doppler signals and performs the complex crosscorrelational analysis on the processed signals. This method uses 2-MHz Doppler signals taken simultaneously from a model circulation pulse flow to produce a sharp correlation peak with a precision of 1-ms delay-time.