Title :
Ultrasonic imaging of internal vibration of soft tissue under forced vibration
Author :
Yamakoshi, Yoshiki ; Sato, Junichi ; Sato, Takuso
Author_Institution :
Tokyo Inst. of Technol., Yokohama, Japan
fDate :
3/1/1990 12:00:00 AM
Abstract :
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.<>
Keywords :
Doppler effect; acoustic imaging; biomedical ultrasonics; patient diagnosis; ultrasonic measurement; vibration measurement; 3 MHz; Doppler frequency shift; forced vibration; internal vibration of soft tissue; low-frequency sinusoidal vibration; low-frequency vibration; simultaneously transmitted probe ultrasonic waves; two-dimensional maps; ultrasonic imaging system; velocities of vibration; vibration amplitude maps; vibration phase maps; Biological tissues; Displays; Frequency measurement; Phase measurement; Probes; Surface waves; Ultrasonic imaging; Ultrasonic variables measurement; Velocity measurement; Vibration measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
