Multi-angle plane wave coherent color Doppler imaging method

Abstract

The invention discloses and provides a multi-angle plane wave coherent color Doppler imaging method which is high in imaging frame frequency, high in imaging efficiency and good in imaging effect and which can generate a more precise and reliable color blood flow image by combining. As all array element sets on an ultrasonic transducer are excited at the same time to generate ultrasonic plane waves instead of traditional point-by-point transmitted ultrasonic waves, whole imaging time is effectively shortened, imaging errors due to time difference overlap are also effectively reduced and imaging efficiency is improved; multiple plane waves are propagated to an imaging area by means of delayed deflection, a precise real-time composite image is acquired by coherence combination of various echo signals, the image can be subjected to non-blood-flow signal removal and calculation to generate a precise reliable color blood flow image. The multi-angle plane wave coherent color Doppler imaging method is applicable to the field of ultrasonic imaging.

Description

technical field [0001] The invention relates to a multi-angle plane wave coherent color Doppler imaging method. Background technique [0002] Ultrasound imaging has the advantages of safety, non-invasiveness, low cost, and real-time imaging in medical diagnosis. After half a century of development, it has become one of the most widely used imaging diagnostic equipment in hospitals. The ultrasonic callback signal can not only be used for tissue imaging, but also provide real-time motion information of the detection target. In human blood vessels, plasma components such as red blood cells and platelets are driven by blood circulation and flow in different quick-freezes. Ultrasonic Doppler imaging is based on the Doppler effect between ultrasonic signals and blood scatterers. In addition to providing information on the shape of blood vessels Images can also be used to detect or judge hemodynamic information such as blood flow velocity and flow stability. Accordingly, the appli...

AI Technical Summary

Problems solved by technology

However, the quantitative analysis of blood flow usually requires an ultrasonic pulse repetition frequency of several kilohertz, while the frame rate of traditional imaging is only tens of hertz. Therefore, the calculation of Doppler spectrum is limited to a single point or several points in the imaging area.

At the same time, in the past, the ultrasonic pulse emission was transmitted point by point by the array element, which made the time error of ultrasonic imaging large, and made the final imaging and the actual error larger.

Images