Diagnostic ultrasound Doppler imaging system and Doppler imaging method for ultrasonic diagnosis

摘要

In order to enable quantitative and ready assessment of the kinetics of a tissue on the basis of motion information of the tissue resulting from analysis performed according to the Doppler method, and to enable ready observation of a temporal change in motion of the tissue, there is provided, as one aspect, a diagnostic ultrasound Doppler imaging system. The system comprises a unit for scanning an object with ultrasonic waves over a cross section of the object to produce an echo signal representing electrical quantities proportional to ultrasonic waves reflected from the object; a unit for extracting from the echo signal a Doppler signal emanating from a tissue in motion inside the object; and a unit for analyzing the frequency of the Doppler signal to obtain two-dimensional image data concerning the motion of the tissue on the cross section frame by frame. The system further comprises a unit for superposing a plurality of old and new frames of the two-dimensional image data computed time-sequentially; and a unit for displaying the superposed two-dimensional image data. The displaying unit includes a circuit for coloring the superposed two-dimensional image data according to the motion of the tissue.