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英文誌(2004-)

Journal of Medical Ultrasonics

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1994 - Vol.21

Vol.21 No.04

Original Article(原著)

(0195 - 0201)

血流ドプラ信号の直接相関を利用する局所脈波速度計測法の研究

Measuring the Local Speed of Pulse Wave Propagation by Correlating Adjacent Doppler Signals from Blood Flow

片倉 景義1, 千田 彰一2, 西谷 智彦2, 松尾 裕英2

Kageyoshi KATAKURA1, Shoichi SENDA2, Tomohiko NISHIYA2, 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 : Pressure wave velocity, Correlation, Coherency, Doppler

The method proposed here for local measurement of blood pressure pulse wave propagation speed uses the complex cross correlation of ultrasonic Doppler signals. The signals are Doppler shifted by blood flow and measured at two closely spaced locations of a blood vessel.
The usual Doppler shift measured for blood flow is about 1 kHz, a propagation delay as small as 1 ms can be measured between adjacent locations.
To improve the coherency between the two Doppler signals, they are processed.
Sharp correlation peak is obtained after this processing for signals taken from carotid artery.