Ultrasonic imaging space compounding method and system

Abstract

The invention provides an ultrasonic imaging space compounding method and system. The method comprises the steps that receiving lines with different deflection angles are arranged at a transmitting beam position where each time of scanning is located, wherein the receiving lines are subjected to multi-angle deflection with the normal direction of a probe as the basis and the depth position of a transmitting focal point as a reference point; the receiving lines at different angles are obtained through beam synthesis, and the delay of beam synthesis is compensated according to the wavefront delay of the transmitting beams; after scanning of all positions is completed, the receiving lines at the same deflection angle form a frame of image at the angle, one of multiple frames of images with different deflection angles serves as a basic image, and other frames of images except the basic image are transformed to have a coordinate system same as that of the basic image; spatial compounding iscarried out on the multiple frames of images in the same coordinate system so as to obtain a composite image for outputting. According to the method and system, the time resolution of imaging is notinfluenced, and the phenomena of image dullness and trailing caused by the prior art are avoided.

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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