Yamakoshi Y, Sato J, Sato T
Tokyo Inst. of Technol., Yokohama.
IEEE Trans Ultrason Ferroelectr Freq Control. 1990;37(2):45-53. doi: 10.1109/58.46969.
An imaging system that can display both the amplitude and phase maps of internal vibration in soft tissues for forced low-frequency vibration is described. In this method, low-frequency sinusoidal vibration of frequency under several hundred hertz is applied from the surface of the sample and the resulting movement in it is measured from the Doppler frequency shift of the simultaneously transmitted probe ultrasonic waves. Basic experiments are carried out by using 3.0-MHz ultrasonic waves. The two-dimensional maps of the amplitude and phase of internal vibration are shown, and the velocities of vibration are measured for some samples as well as in vivo.
本文描述了一种成像系统，该系统能够显示软组织内部在低频强迫振动下的振幅和相位图。在该方法中，从样品表面施加几百赫兹以下的低频正弦振动，并通过同时发射的探测超声波的多普勒频移来测量样品内部由此产生的运动。使用3.0兆赫兹的超声波进行了基础实验。展示了内部振动的振幅和相位的二维图，并对一些样品以及体内的振动速度进行了测量。
