Method and system for contrast-enhanced ultrasound imaging based on amplitude modulation in transmitted pulse

Abstract

The invention provides an ultrasound contrast imaging method and system based on amplitude modulation in transmission pulse. The method comprises following steps: first pulse signals and second pulse signals are transmitted continuously in any scanning line; the first pulse signals and the second pulse signals are received, and first echo signals and second echo signals are acquired according to the received first pulse signals and the received second pulse signals; the first echo signals and the second echo signals are superposed or subtracted to obtain quadratic component echo signals in a current scanning line, wherein the first pulse signals comprise positive impulses and negative impulses, the amplitudes or widths of the positive impulses and the negative impulses are different, and in the same period, the phase positions of the second pulse signals and the first pulse signals differ in 180 DEG C or are the same; the amplitudes of the second pulse signals are N times of that of the first pulse signals, the N is a real number greater than zero. Through the adoption of the method and the system, the nonlinear frequency components of an ultrasonic contrast agent are improved, the image quality is further improved, the use cost is lowered and the method and the system are simple and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic diagnosis, and in particular relates to an ultrasonic contrast-enhanced imaging method and system based on amplitude modulation within a transmission pulse. Background technique [0002] Medical contrast-enhanced ultrasound imaging is just one of the medical imaging systems. It is a technology that uses contrast agents to enhance backscattered echoes and significantly improve the resolution, sensitivity and specificity of ultrasound diagnosis. With the improvement of instrument performance and the emergence of new acoustic contrast agents, contrast-enhanced ultrasound can effectively enhance the two-dimensional ultrasound images and Doppler signals of blood flow in solid organs such as the myocardium, liver, kidney, and brain, reflecting and observing normal tissues and The blood perfusion of diseased tissue has become a very important and promising development direction of ultrasonic diagnosis...

AI Technical Summary

Problems solved by technology

[0005] However, neither of the above two methods of contrast-enhanced ultrasound imaging can achieve phase and amplitude modulation simultaneously in two transmission pulses, which further reduces the nonlinear frequency components of ultrasound contrast agents, resulting in poor image quality and increasing the cost of use.

[0006] Therefore, CEUS methods to improve image quality remain challenging

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