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Position estimation method of ultrasonic elastography one-dimensional axial displacement estimation window

An ultrasonic elastography and axial displacement technology, applied in ultrasonic/sonic/infrasonic diagnosis, sonic diagnosis, infrasonic diagnosis, etc., can solve problems such as image texture fluctuation, suppress amplitude modulation noise, improve quality and quality, and avoid strain The effect of texture fluctuations

Inactive Publication Date: 2014-05-07
CHONGQING UNIV OF TECH
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Problems solved by technology

This method can improve the quality of imaging to a certain extent, but the strain generated by this method is not the strain at the preset point, so it will cause image texture fluctuations

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  • Position estimation method of ultrasonic elastography one-dimensional axial displacement estimation window
  • Position estimation method of ultrasonic elastography one-dimensional axial displacement estimation window

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] A method for estimating the position of a one-dimensional axial displacement estimation window of ultrasound elastography, the method comprising the following steps:

[0024] (1) Compress the tissue with an ultrasonic probe, take ultrasonic scattered echo signal frames before and after compression, and estimate the position of the estimation window for the signal frames before compression;

[0025] (2) Determine the window length L and displacement sampling point of the one-dimensional estimation window according to the requirements of signal-to-noise ratio and spatial resolution;

[0026] (3) Set the axial coordinates of the displacement estimation sampling points as the initial coordinates of the center point of the one-dimensional estimation window, namely: , where y 0 is the axial coordinate of the displacement sampling point, y ...

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Abstract

The invention discloses a position estimation method of an ultrasonic elastography one-dimensional axial displacement estimation window, which comprises the following steps of: 1, setting an initial position of the center of the one-dimensional axial displacement estimation window as a displacement estimation sampling point; 2, generating a position coordinate of the one-dimensional axial displacement estimation window by using an iteration method; 3, using a coordinate generated by iteration as a coordinate of a center point of the displacement estimation window, and taking the one-dimensional window with the point as the center for carrying out axial displacement estimation; and 4, carrying out gradient operation on a displacement estimation value to generate an elastic image. According to the invention, by adopting a new position estimation algorithm of the one-dimensional estimation window, the displacement estimation is carried out on the two-dimensional estimation window so that a more accurate displacement of a preset sampling point can be generated, and the influence of signal amplitude random fluctuation and signal compression to displacement estimation is avoided, therefore, amplitude modulation noise of elastography is effectively inhibited, strain texture fluctuation is avoided being caused, and the elastography quality and quality are improved.

Description

technical field [0001] The invention belongs to the technical field of medical ultrasonic engineering, and in particular relates to a method for estimating the position of a one-dimensional estimation window when estimating axial displacement in ultrasonic elastography. Background technique [0002] Ultrasound elastography is a new imaging mode that generates tissue elastic characteristic information through the correlation analysis of ultrasonic echoes before and after compression and displays them in images. Because it can reflect changes in tissue elasticity parameters, this imaging mode has become an important tool for clinical detection and diagnosis of various diseases, such as breast cancer, prostate cancer, thyroid nodules, and liver fibrosis. [0003] The ultrasound elastography process usually includes three steps: displacement estimation, strain estimation, and display post-processing. Displacement estimation is the core link in elastography, and its estimation a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00
Inventor 崔少国黄贤英彭彩碧
Owner CHONGQING UNIV OF TECH
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