Ultrasonic doppler blood flow imaging method and system

Abstract

The invention relates to an ultrasonic doppler blood flow imaging method and system. The imaging method comprises the steps of obtaining a blood flow speed measuring interest region and the quantity of launching sub-hole diameters; according to the quantity of the launching sub-hole diameters, determining the inclination angle of a plane wave in each launching sub-hole diameter; according to the inclination angle, determining array element excitation delay time in each launching sub-hole diameter; according to the array element excitation delay time, controlling all the launching sub-hole diameters to synchronously emit plane waves, and receiving echo signals through a full hole diameter; generating a radio frequency signal sequence according to the echo signals; extracting blood flow doppler signals of the blood flow speed measuring interest region according to the radio frequency signal sequence; determining blood flow speed according to the blood flow doppler signals; and generatingdoppler blood flow images of the blood flow speed measuring interest region according to the blood flow speed. Through the adoption of the imaging method and system provided by the invention, the largest pulse repeating frequency can be realized, and besides, motion artifacts introduced by radio frequency signal compositing in ultra-high ultrasonic doppler blood flow imaging can be restrained.

Description

technical field [0001] The invention relates to the field of ultrasound Doppler blood flow imaging, in particular to an ultrasound Doppler blood flow imaging method and system. Background technique [0002] With the rapid development of modern society, common bad living habits such as smoking, dyslipidemia, obesity, unhealthy diet, and lack of physical exercise have led to a high incidence of atherosclerosis. At the same time, the incidence of vascular diseases caused by atherosclerosis is also increasing year by year. Cardiovascular and cerebrovascular diseases represented by myocardial infarction and ischemic stroke have the characteristics of high disability rate and high mortality rate due to the extremely short effective rescue time after onset. Therefore, as a major public health problem affecting social development, cardiovascular and cerebrovascular diseases have become the number one killer threatening human life and health. Clinically, monitoring the course of at...

AI Technical Summary

Problems solved by technology

However, the multi-angle plane waves used for coherent superposition still emit multi-angle plane waves successively in time, resulting in low pulse repetition frequency. Therefore, the multi-angle plane wave repetition compound algorithm based on recursive technology does not solve the motion artifacts in the compound radio frequency signal problem, and the pulse repetition frequency is low

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