Ultrasonic imaging spatial composite method and system

Abstract

The present invention provides a method and system for spatial compounding of ultrasonic imaging. The method includes: setting receiving lines with different deflection angles at the position of the transmitting beam where each scanning is performed, and the receiving lines are the receiving lines in the normal direction of the probe. Based on the multi-angle deflection with the depth position of the transmitting focus as the reference point; the receiving lines at different angles are obtained through beamforming, and the delay of the beamforming is compensated according to the wavefront delay of the transmitting beam; the scanning of all positions is completed. After checking, the receiving line of the same deflection angle forms a frame image of the angle, and one of the multiple frames of images with different deflection angles is used as the base image, and the other frame images except the base image are transformed to have the same coordinate system as the base image ; Composite multiple frames of images in the same coordinate system to obtain a composite image for output. The invention does not affect the time resolution of imaging, and avoids the phenomenon of image sluggishness and tailing caused by the prior art.

Description

technical field [0001] The invention belongs to the field of medical ultrasonic diagnostic imaging, in particular to an ultrasonic imaging space composite method and system. Background technique [0002] Ultrasound imaging has become one of the most widely used clinical diagnostic tools because of its non-invasive, real-time, convenient operation, and low price. During the ultrasonic imaging process: the probe emits a focused ultrasonic beam, and each element of the probe receives the ultrasonic echo signal and enters each channel for amplification and filtering processing. The channel-level signal is subjected to beam synthesis to obtain a radio frequency signal (RF signal), and the above scanning process is repeated. Until a frame of radio frequency signal with a certain linear density is obtained, the radio frequency signal is processed by demodulation and filtering to obtain an orthogonal signal (IQ signal), the orthogonal signal is processed to obtain an image, and the ...

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Problems solved by technology

[0007] However, the existing technology can meet the real-time requirements, and the frame rate will not be reduced, but when the composite angle is large or there are many angles, the image will appear serious sluggishness and smearing, that is, the time resolution of the image will be reduced

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