Patent ID: 7422561

Claim:
An ultrasonic diagnostic system for preparing a diagnostic data including image by transmitting ultrasonic pulses to a living tissue, and receiving and analyzing reflected waves of the ultrasonic pulses, the ultrasonic diagnostic system comprising: a beam scanning means for transmitting an ultrasonic beam having a plurality of ultrasonic pulses to a living tissue while successively changing over the radiating position of said ultrasonic beam, said plurality of ultrasonic pulses being transmitted at a repeated transmission frequency of a few kHz, said living tissue being a heart wall; a reflected wave receiving means for receiving a plurality of wave signals reflected at the heart wall; an analytical processing means for calculating a displacement waveform of a region of interest (ROI) by applying a phased tracking method to the received plurality of wave signals, for changing a position and size of the region of interest (ROI) based on the calculated displacement waveform, for calculating the plurality of backscattering intensity signals during one pulsation of the heart and for measuring the plurality of backscattering intensity signals during one pulsation of a heart by using a scattering wave from the region of interest (ROI) in the heart wall based on the received plurality of wave signals; and a detecting means for detecting a variation frequency of the measured plurality of backscattering intensity signals during one pulsation of the heart to obtain the diagnostic data, said variation frequency being a frequency of tens to hundreds of Hz and being superimposed over heart cyclic variations (CV).