A DSP Chip-Based Processor for Ultrasonic Bloodflow Doppler Signals

Abstract

An ultrasonic Doppler method, by which blood flow velocities can be detected, is noninvasive and effective means for diagnosis of cardiovascular disease. In this paper, a Doppler signal processor for estimating the blood flow velocity and a color Doppler system for imaging the velocity profile are described. The processor using a programable DSP chip is developed to process the sensed Doppler signal by both instantaneous frequency method and FFT power spectrum method. In preliminary clinical trials, a new visualizing method of a cardiac structure is proposed and a clear imaging result is obtained.