Method and system for displacement estimation of ultrasonic elastography, terminal and readable storage medium

Abstract

The invention is applicable to the technical field of image processing, and provides a method for displacement estimation of ultrasonic elastography. The method comprises the following steps: sequentially determining a coordinate point to be subjected to displacement estimation in an image as a current seed point according to the size of an initialization cross correlation coefficient, and performing displacement estimation calculation on the current seed point in a certain search area, comparing the obtained calculation result with the initialization result of the seed point, previously determined by four neighbor points of the current seed point, and determining the displacement estimation value corresponding to the larger cross correlation value as the optimal displacement estimation result of the current seed point. The accuracy and the robustness of the method are further improved, and a two-dimensional sum tables technology is combined to reduce redundant and repeated calculationin similarity judgment and improve the calculation efficiency of the algorithm.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an ultrasonic elastography displacement estimation method, system, terminal and readable storage medium. Background technique [0002] Ultrasound elastography is an imaging technique that targets the elastic parameters of soft tissues. It can image tissue mechanical properties (such as tissue elasticity and tissue hardness), which broadens the application of ultrasound images in tumor detection and imaging of diffuse diseases. Clinical disease diagnosis provides richer functional information. The most critical step in ultrasound elastography is to accurately and quickly track the motion of ultrasound speckle in each frame of RF data. [0003] Most of the existing fast two-dimensional speckle tracking algorithms assume that the displacement field is continuous, but in practical applications, different biological tissues will appear layered, so the actual ultr...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method, system, terminal and readable storage medium for displacement estimation based on ultrasonic radio frequency signals, aiming to solve the problem of insufficient robustness and accuracy in displacement estimation in existing ultrasonic elastography techniques. High, failed to make full use of the neighborhood point information of the seed point for displacement estimation, there are many redundant and repeated calculations in the execution of similarity judgments, and the calculation efficiency is low

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