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Method and device for calculating displacement of quasi-static ultrasonic elastography

A technology of ultrasonic elastography and displacement calculation, which is applied in ultrasonic/sonic/infrasonic diagnosis, sonic diagnosis, infrasonic diagnosis, etc. It can solve problems such as cascading errors and large amount of calculation for two-dimensional cross-correlation search.

Active Publication Date: 2019-04-16
SONOSCAPE MEDICAL CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] The embodiment of the present invention provides a quasi-static ultrasonic elastography displacement calculation method and device to solve the technical problems existing in the prior art, such as chain errors easily caused by iteration, and the calculation amount of two-dimensional cross-correlation search is too large.

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  • Method and device for calculating displacement of quasi-static ultrasonic elastography
  • Method and device for calculating displacement of quasi-static ultrasonic elastography
  • Method and device for calculating displacement of quasi-static ultrasonic elastography

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Embodiment 1

[0107] Please refer to figure 1 , an embodiment of the present invention provides a quasi-static ultrasonic elastography displacement calculation method, which may include:

[0108] 110. Collect and obtain continuous multi-frame ultrasonic radio frequency signals.

[0109] When the ultrasonic probe of the ultrasonic measuring instrument is used to press and detect the biological tissue under test, such as human skin, the ultrasonic probe will periodically send ultrasonic waves and receive the ultrasonic echoes of the biological tissue under test, thereby collecting multiple frames of ultrasonic radio frequency signals. Each frame of ultrasonic radio frequency signals collected may include multiple scanning lines, the scanning lines may be detection lines perpendicular to the surface of the biological tissue to be measured, and each scanning line may include multiple sampling points. Preferably, the data sampling rate of each scanning line in the longitudinal direction may be ...

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Abstract

The invention discloses a quasi-static ultrasonic elastography displacement calculation method so as to solve the technical problems that linkage is mistaken and two-dimensional cross-correlation research calculated quantity is excessively large due to iteration in the prior art.The embodiment of the invention further provides a corresponding device.According to the feasible embodiment, the method comprises the steps of calculating a central point for any displacement, and utilizing prior time shifting for building an iteration cross-correlation function based on a neighborhood window for iteration cross-correlation calculation; obtaining a cross-correlation reliability exponential value of iteration cross-correlation calculation, and judging whether the cross-correlation reliability exponential value is smaller than a first credible threshold value or not; if the cross-correlation reliability exponential value is larger than or equal to the first credible threshold value, determining transverse time shifting according to the prior time shifting, and determining longitudinal time shifting according to the prior time shifting and an iteration cross-correlation result; if the cross-correlation reliability exponential value is smaller than the first credible threshold value, using two-dimensional comprehensive cross-correlation research inside the neighborhood to obtain the longitudinal time shifting and the transverse time shifting of the central point of displacement calculation; traversing all ultrasonic radio-frequency signals, and generating displacement field distribution of tested biological tissue.

Description

technical field [0001] The invention relates to the technical field of ultrasonic imaging, in particular to a displacement calculation method and device for quasi-static ultrasonic elastography. Background technique [0002] The changes in the softness and hardness of biological tissues are usually directly related to the pathological changes of the tissues. For example, more than three-quarters of malignant breast cancers appear as hard lumps, while most of the benign hyperplastic lesions appear as soft and hard as normal tissues. Ultrasound (Ultrasound) elastography ("Elastography" or "Strain Imaging") is a new mode of medical ultrasound imaging that has emerged in the past ten years. It mainly uses ultrasound to detect and image tissue mechanical characteristic parameters for clinical disease diagnosis. Provide richer functional information. Ultrasonic elastography can be divided into quasi-static ultrasonic elastography, transient ultrasonic elastography, and shear wav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00
Inventor 刘德清冯乃章董颖
Owner SONOSCAPE MEDICAL CORP
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