A method for enhancing the performance of ultrasound elastography

A technology of ultrasonic elastography and performance, applied in ultrasonic/sonic/infrasonic image/data processing, ultrasonic/sonic/infrasonic Permian technology, organ movement/change detection, etc., can solve amplitude modulation noise, error displacement propagation And other issues
CN102920480BInactive Publication Date: 2014-10-22CHONGQING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING UNIV OF TECH
Publication Date
2014-10-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an ultrasonic elastography property enhancement method which comprises the following steps of: selecting adjacent estimated high-quality reliable displacements as initial iteration displacements of a current window; iterating by using a two-dimensional phase root search displacement estimation improved algorithm and calculating a corresponding correlation coefficient; establishing a position corresponding to the displacement by using a two-dimensional window displacement position estimation improved algorithm, then correcting a displacement estimation value to a tracking window center point by using a linear interpolation method; carrying out longitudinal strain estimation by using a gradient method; and carrying out downsampling and gray scale mapping on a strain estimation matrix, scanning and converting to generate an elastic image. According to the ultrasonic elastography property enhancement method, the propagation of a wrong displacement can be avoided, the influence of tissue transverse motion and signal decorrelation to axial displacement estimation is reduced, the amplitude modulation noise caused by signal amplitude random fluctuation is inhibited, the imaging quality is improved, and the image property is enhanced so that an image is more continuous, smooth and clear.
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Description

technical field

[0001] The invention belongs to the technical field of medical ultrasonic elastography, and in particular relates to a method for enhancing the performance of ultrasonic elastography, which mainly includes displacement estimation and displacement correction technologies. Background technique

[0002] Ultrasound (Ultrasound) elastography (Strain Imaging) is a new mode of medical ultrasound imaging, which mainly uses ultrasound to detect and image tissue mechanical characteristic parameters. When human tissue is pathologically affected, it usually manifests as a change in its mechanical parameters. When diseases such as breast cancer, prostate cancer, and liver fibrosis occur, the corresponding elastic modulus (hardness) changes. Elastography provides an important means for the detection and diagnosis of various diseases, especially tumors.

[0003] The quasi-static compression method is a commonly used imaging method for ultrasound elastography. This method ...

Claims

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