High-frame-rate cardiac ultrasound myocardial motion displacement estimation method and system

Abstract

The invention discloses a high-frame-rate cardiac ultrasound myocardial motion displacement estimation method and system, and the method comprises the steps: transmitting an ultrahigh-frame-rate multi-angle divergent wave to a heart, receiving an echo signal, and obtaining high-frame-rate multi-angle coherent composite divergent wave cardiac ultrasound sequence radio frequency data; the method comprises the following steps: carrying out edge detection and identification on cardiac muscle on high-frame-rate multi-angle coherent composite divergent wave cardiac ultrasequence radio frequency data in a plurality of cardiac cycles to generate a cardiac muscle mask, estimating a large displacement estimation item, a small displacement estimation item and a regular item according to the cardiac muscle mask, and jointly constructing a cardiac muscle displacement estimation cost function; by integrating large displacement and small displacement to construct a cost function, introducing a regular term, rewriting the cost function and considering the coincidence rate, the problems that the large displacement and the small displacement are difficult to balance, and extreme points, decorrelation noise and out-of-plane movement exist during displacement estimation are solved, and accurate estimation of myocardial movement during rapid heart pulsation is achieved.

Description

technical field [0001] The invention belongs to the field of ultrasound imaging, and in particular relates to a method and system for estimating myocardial movement displacement by high-frame-rate cardiac ultrasound. Background technique [0002] High frame rate imaging of the heart, such as early heart failure due to stress reconstruction of the myocardial fiber layer, cannot be accurately detected in the resting state (heart rate around 65bpm). Myocardial stress test (heart rate will reach above 120bpm), including drug stress test and stress test under exercise state, is used to induce early abnormal cardiac muscle function, so as to carry out early detection. [0003] Commonly used stress tests are mainly ECG detection technology, but ECG detection cannot be visualized intuitively; ultrasound has the highest frame rate among imaging technologies, and has the advantages of real-time dynamics, no radiation, and bedside detection, so it is often used to detect cardiac struct...

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Problems solved by technology

[0005] Due to the rapid beating of the heart, especially the high-speed contraction and relaxation changes up to 120bpm under the stress test, the displacement estimation of the myocardium is interfered by the inter-frame decorrelation noise and the interference of the out-of-plane motion of the myocardium. There are extreme points in the estimation, especially in the displacement estimation of the myocardial edge, which seriously reduces the accuracy of the myocardial displacement estimation, especially in the cardiac stress test, which is more important

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