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Method and device for estimating elastic displacement and strain of biological tissue

A technology of biological tissue and elastic displacement, applied in application, medical science, diagnosis, etc., can solve problems such as inaccurate calculation results of one-dimensional methods

Active Publication Date: 2020-05-05
SUZHOU GUOKE ULTRA MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, an embodiment of the present invention provides a method and device for estimating elastic displacement and strain of biological tissue to solve the problem of inaccurate calculation results of one-dimensional methods when the compression degree of biological tissue is relatively large

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  • Method and device for estimating elastic displacement and strain of biological tissue
  • Method and device for estimating elastic displacement and strain of biological tissue
  • Method and device for estimating elastic displacement and strain of biological tissue

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Embodiment 1

[0050] figure 1 A flow chart of a method for estimating elastic displacement of biological tissue according to an embodiment of the present invention is shown. according to figure 1 As shown, the method includes the following steps:

[0051] S101: Respectively acquire a first amplitude sequence corresponding to the ultrasonic reflection signal sequence before biological tissue compression and a second amplitude sequence corresponding to the compressed ultrasonic reflection signal sequence.

[0052] Specifically, each array unit of the ultrasonic array probe may be used to transmit ultrasonic signals to the biological tissue and collect reflected signals as the first sampling sequence pre_RF(x,y). Then apply a slight squeeze to the biological tissue along the direction in which the ultrasonic signal is emitted, and at the same time use the same ultrasonic array probe to transmit the ultrasonic signal to the compressed biological tissue and collect the reflected signal as the ...

Embodiment 2

[0073] figure 2 A flow chart of a method for estimating elastic displacement of biological tissue according to an embodiment of the present invention is shown. according to figure 2 As shown, the method includes the following steps:

[0074] S201: Respectively acquire a first amplitude sequence corresponding to the ultrasound reflection signal sequence before biological tissue compression and a second amplitude sequence corresponding to the compressed ultrasound reflection signal sequence.

[0075] For this step, please refer to step S101 in the first embodiment, which will not be repeated here.

[0076]S202: Set a first calculation window array in the first amplitude sequence, set a first search window array in the second amplitude sequence, and position the first calculation window and the first search window in one-to-one correspondence. The first calculation window overlaps the corresponding first search window, and the first calculation window is smaller than the cor...

Embodiment 3

[0133] Figure 7 A flow chart of the method for sliding the sliding window within the corresponding search window area in the second embodiment is shown.

[0134] This method is applicable to the process in which the second sliding window slides based on the first displacement in the corresponding second search window area. At this time, the sliding window in the following steps is the second sliding window, the calculation window is the second calculation window, and the search window is The second search window; the initial position of the second sliding window is the position after the second calculation window is moved according to the first displacement.

[0135] This method is also applicable to the process that the third sliding window slides based on the second displacement in the corresponding third search window area. At this time, the sliding window in the following steps is the third sliding window, the calculation window is the third calculation window, and the se...

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Abstract

The invention discloses methods and devices for estimating elastic displacement and strain of biological tissues, wherein the method of estimating elastic displacement comprises: acquiring an uncompressed first amplitude sequence and a compressed second amplitude sequence; determining relative displacement of each pair of low-level windows according to a correlation coefficient of inner amplitudes of the low-level windows when overlap position of the low-level windows changes; calculating a ratio of maximum value of the relative displacement of the low-level windows to length of an ultrasonic reflected signal; judging whether the ratio is greater than or equal to a preset threshold or not; if yes, expanding the relative displacement of the low-level windows to a higher-level window array, and determining elastic displacement of biological tissues according to a correlation coefficient of inner amplitudes of each pair of higher-level windows when the overlap position of the higher-level windows changes. In the method, compression degree of the biological tissues is roughly judged before whether to use a two-dimensional method is selected accordingly, and the problem that calculation results of a one-dimensional method in case of high compression degree are inaccurate can be solved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic imaging, in particular to a method and device for estimating elastic displacement and strain of biological tissue. Background technique [0002] After long-term clinical diagnosis and verification, the occurrence of lesions is often accompanied by changes in the hardness and elastic properties of biological tissues. For example, when breast cancer occurs, there will be obvious hardened cysts, resulting in a large difference in elasticity from normal tissue. Therefore, in the medical field, the hardness and elasticity information of biological tissues has very important reference significance for the detection of diseases. However, traditional medical detection methods such as computed tomography (CT), magnetic resonance imaging (MRI) and ultrasound imaging cannot directly obtain such information of biological tissues. Ultrasound elastography, as an effective means to detect the hardness and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00
CPCA61B8/4444A61B8/485A61B8/52
Inventor 伍吉兵崔崤峣焦阳韩志乐徐杰
Owner SUZHOU GUOKE ULTRA MEDICAL TECH CO LTD
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