ASSIGNMENT OF BLOODSTREAM PARAMETER

摘要

PURPOSE: To provide a vascular flow spectrum analysis-ultrasonic system to map a vascular flow index to diagnose diffusion of blood into an organ, by transmitting plural ultrasonic pulses to analyze plural gates on a vascular flow quantity over heart frequency and converting the spectrum data to the vascular flow index. CONSTITUTION: A transmission part of a transceiver unit 12 transmits an ultrasonic pulse through a convertor 14 and a receiver part of the transceiver unit 12 receives an echo and transmits it to a modulator 16 and a two dimensional imaging channel 17. The modulator 16 supplies a phase signal and a quadrant signal and signals from the modulator 16, and the two dimensional imaging channel 17 are sent to a processor 18 and then processed signals are sent to a display unit 19 where spectrum signals reflected to a spectrum density function proportional to speed are converted as a function of time extending over one cardiac cycle per each gate and a vascular flow parameter is selected to calculate the flow quantity parameter selected from the spectrum density function.