A NEW METHOD OF MEASURING INVIVO SOUND SPEED IN THE REFLECTION MODE
A NEW METHOD OF MEASURING INVIVO SOUND SPEED IN THE REFLECTION MODE
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DOI：
10.1002/jcu.1870160204
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发表时间：
1988-02-01
影响因子：
0.9
通讯作者：
KODAMA, M
中科院分区：
文献类型：
--
作者：
HAYASHI, N;TAMAKI, N;KODAMA, M
本文介绍了一种反射模式下体内声音测量的新方法。反射器和线阵换能器之间的平均声速使用以下三个参数测量：飞行时间、飞行时间差和两个接收器元件之间的距离。为了检测飞行时间，调整系统延迟线时间补偿器以获得最清晰的反射器图像。该方法在人体肝脏中进行了体内评估，特别是26个正常肝脏，27个肝硬化肝脏和15个脂肪肝。得到了膜片与换能器之间的平均声速。肝硬化患者声速明显高于脂肪肝患者，脂肪肝患者声速明显低于肝硬化患者。
This paper describes a new method for in vivo sound measurement in the reflection mode. The mean sound speed between the reflector and linear array transducer is measured using the following three parameters: time of flight, time of flight difference, and distance between two receiver elements. To detect time of flight, the system delay‐line time compensator is adjusted to obtain the sharpest reflector image.This method was evaluated in vivo in human livers, specifically 26 normal, 27 cirrhotic, and 15 fatty livers. The mean sound speed between diaphragm and the transducer was obtained. The measured sound speed was significantly higher in cirrhotic livers and lower in fatty livers.