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过去有关心血管系统的功能及调制的一些基本概念都是建立在损伤性的动物实验的测量与观察的基础上。今天我们可以利用超声波多普勒效应进行直接记录、显示、分析、估计人体心血管系统的许多生理及病理现象。这一技术在心血管检测中的应用已显示出很大的优越性。一、超声多普勒的检测原理超声波声源与被测物体间作相对运动时出现多普勒效应是人所共知的。由于红细胞直径(大约8μm)较入射波长小得多,因此
Some of the basic concepts of past cardiovascular system function and modulation have been based on the measurement and observation of traumatic animal experiments. Today we can use the ultrasound Doppler effect for direct recording, display, analysis, estimation of many physiological and pathological phenomena of the human cardiovascular system. The use of this technique in cardiovascular testing has shown great advantages. First, the ultrasonic Doppler detection principle Ultrasound sound source and the measured object for relative motion Doppler effect is well known. Since the diameter of the erythrocytes (about 8 μm) is much smaller than the incident wavelength,