Ultrasonic Imaging Method Based on Gaussian Function Probe Response Model and Compressed Sensing

Abstract

The present invention relates to the ultrasonic imaging field, especially to an ultrasonic imaging method based on a Gaussian function probe response model and compressed sensing. The objective of the invention is to realize imaging by only employing a low-level hardware computing platform while ensuing the ultrasonic imaging with high frame frequency and high imaging quality. Concretely, a relation between the time delay information through ultrasonic echo radio-frequency signals relative to the emission moment of an ultrasonic plane wave and the spatial position information of scatterer distribution is provided, the Gaussian function is employed to approximately describe response model of ultrasonic signals when probe emission and receiving, the amplitude attenuation of the ultrasonic signals propagated in a medium is considered, and a relation matrix M expressed at the time domain is established. The ultrasonic imaging method based on the Gaussian Function probe response model and the compressed sensing can be applied to the fields requiring high frame frequency and high resolution imaging and a low-level hardware computing platform, such as medical imaging and the like, and has great practical values.

Description

technical field [0001] The present invention generally relates to the field of ultrasonic imaging, in particular to an ultrasonic imaging method based on a Gaussian function probe response model and compressed sensing. Background technique [0002] The working principle of traditional ultrasonic imaging, taking the linear array ultrasonic transducer as an example, the linear array transducer has N array elements that can transmit / receive independently, corresponding to N ultrasonic transmitting channels and signal receiving channels. , using the delayed transmission of multiple channels, so that the ultrasonic signals of different channels reach the focus position at the same time, forming a transmission focus; The received signals are summed together to form the receive focus. Such a transmission and a reception can form a scanning line. Ultrasound imaging usually adopts electronic scanning, and M times of focused transmission / reception is performed to obtain M scanning l...

AI Technical Summary

Problems solved by technology

This process not only increases the amount of calculation, but also introduces calculation errors due to the limited signal length, which in turn affects the final imaging quality

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