Method and apparatus ultrasonic scanning for three-dimentional image display

PROBLEM TO BE SOLVED: To prevent noises interrupting observation of a lesion by processing an ultrasonic Doppler information signal, which is generated from ultrasound transmitted toward a human body and is received at a spatial point within the area, and by displaying the intensity of Doppler power by spatial standard in three-dimentional display. SOLUTION: A Doppler shift processor 22 calculates the shift of Doppler phase or of frequency at the point where each steric sample exists within the picture image area and processes many samples of signal which are detected by a group of Doppler sensor pulse that detects each sample's position. The value of steric sample is transferred to a speed image processor 26, and the value of color displayed as a picture element on a display 40 is transferred to a scan converter and a display processor 32. Each color indicates a particular speed of the flow at the position of the image in a particular direction. The value of Doppler power that is calculated at the processor 24 is mapped and its intensity or the value of color is displayed by a power image processor 28.