System and method for real-time ultrasonic elastography displacement estimation

An ultrasonic elastography and displacement technology, applied in ultrasonic/sonic/infrasonic Permian technology, ultrasonic/sonic/infrasound image/data processing, organ motion/change detection, etc. , to achieve the effect of solving phase aliasing and improving accuracy

Inactive Publication Date: 2013-04-17
SHENZHEN UNIV
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It aims to solve the problems in the prior art t...

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  • System and method for real-time ultrasonic elastography displacement estimation
  • System and method for real-time ultrasonic elastography displacement estimation
  • System and method for real-time ultrasonic elastography displacement estimation

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[0041] The present invention provides a method and system for real-time ultrasonic elastography displacement estimation. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0042] see figure 1 , which is a flowchart of the real-time ultrasonic elastography displacement estimation method of the present application. As shown in the figure, the real-time ultrasonic elastography displacement estimation method includes the following steps:

[0043] S1. Use the two-dimensional matching algorithm to estimate the two frames of RF signals to be processed, and obtain the displacement field , there is a displacement change between the two frames of radio frequency signals;

[0044] S2. Set a priori estimate tp , th...

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Abstract

The invention discloses a system and a method for real-time ultrasonic elastography displacement estimation. The method includes: firstly, pre-estimating to-be-processed two frames of radio-frequency signals by means of the two-dimensional matching algorithm to obtain a displacement field U(u,v), wherein displacement variation exists between the two frames of radio-frequency signals; secondly, setting a priori estimate tp which is equal to the axial displacement Ut(u) of the displacement field U(u,v); thirdly, keeping displacement of the two frames of radio-frequency signals within a 1/4 wavelength; and finally, calculating phase shift according to the priori estimate tp and the lateral placement Ut(v) of the displacement field U(u,v) to obtain the axial displacement field u(t). By means of the system and the method for real-time ultrasonic elastography displacement estimation, the problem of phase aliasing in traditional phase shifting algorithm is solved, and estimation precision is effectively improved on the premise of giving consideration to the arithmetic speed.

Description

technical field [0001] The present invention relates to the technical field of ultrasound elastography, in particular to a real-time ultrasound elastography displacement estimation method and system. Background technique [0002] Soft tissue lesions are often accompanied by changes in tissue stiffness. For example, breast or prostate solid tumors are harder than normal tissue, while liquid cysts are less firm than normal tissue. Traditionally, clinicians use palpation to qualitatively judge the softness and firmness of masses. However, when the mass is buried deep inside the soft tissue or is small in size, it is difficult to detect these tissue lesions by palpation. Ultrasound elastography is a new ultrasound imaging technology that has developed rapidly in recent years. It can image tissue mechanical properties (such as tissue elasticity and tissue hardness) and provide more functional information for clinical disease diagnosis. [0003] However, there are certain defic...

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Application Information

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IPC IPC(8): A61B8/08
Inventor 陆敏华孙瑞超汪天富陈思平
Owner SHENZHEN UNIV
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