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Shear wave imaging method, device and storage medium

An imaging method and shear wave technology, applied in the field of medical diagnosis, can solve problems such as the need to improve the accuracy

Active Publication Date: 2022-05-27
CHISON MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some schemes in shear wave velocity estimation will estimate the shear wave propagation velocity based on the fundamental wave signal, and some schemes will estimate the shear wave propagation velocity based on the harmonic signal, but the accuracy needs to be improved

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  • Shear wave imaging method, device and storage medium
  • Shear wave imaging method, device and storage medium
  • Shear wave imaging method, device and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 of the present invention provides a shear wave imaging method. figure 2 It is a schematic flowchart of the shear wave imaging method in Embodiment 1 of the present invention, such as figure 2 As shown, the shear wave imaging method of Embodiment 1 of the present invention includes the following steps:

[0045] S201: Acquire a first shear wave parameter obtained according to the fundamental wave signal, and a first quality factor corresponding to the first shear wave parameter.

[0046] In the embodiment of the present invention, the first shear wave parameter includes a first shear wave displacement estimate value and a first shear wave velocity estimate value. In the embodiment of the present invention, if one displacement is estimated by using two consecutive fundamental wave tracking data of a point, N-1 displacements can be calculated from the data of each point in the region of interest of shear wave elastography. That is, N frames of fundamental w...

example 1

[0062] image 3 A block diagram of a system for estimating shear wave velocity from fundamental and harmonic signals is shown. The beam generator can generate a transmit signal that lasts up to 100 μs. Of course, it can also generate short pulses for conventional imaging modes such as grayscale, color flow and Doppler spectral modes. The transmit beamforming module will provide delay control for each channel so that the transmit beam can be focused and steered.

[0063] The pulser basically produces a delay-controlled transmit signal at high voltage so that the ultrasound system can deliver enough power to the transducer. The transmit / receive switch provides a mechanism to isolate the high voltage transmit signal from the receive path, so that the vulnerable receive channel is not damaged by high voltages. Therefore, during transmit, the T / R switch is in transmit mode, and the high-voltage signal can enter the transducer, but the high-voltage signal will not enter the recei...

Embodiment 2

[0083] Embodiment 2 of the present invention provides a shear wave imaging device. Figure 5 It is a schematic structural diagram of the shear wave imaging device in Embodiment 2 of the present invention, as shown in Figure 5 As shown, the shear wave imaging device according to Embodiment 2 of the present invention includes a first acquisition module 50 , a second acquisition module 52 , a comparison module 54 and a velocity estimation module 56 .

[0084] Specifically, the first acquisition module 50 is configured to acquire the first shear wave parameter obtained according to the fundamental wave signal and the first quality factor corresponding to the first shear wave parameter.

[0085] The second obtaining module 52 is configured to obtain the second shear wave parameter obtained according to the harmonic signal and the second quality factor corresponding to the second shear wave parameter.

[0086] The comparison module 54 is configured to compare the first quality fac...

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Abstract

The invention discloses a shear wave imaging method, device and storage medium, wherein the shear wave imaging method includes acquiring a first shear wave parameter obtained from a fundamental wave signal and a first shear wave parameter corresponding to the first shear wave parameter A quality factor; obtain the second shear wave parameter obtained according to the harmonic signal, and the second quality factor corresponding to the second shear wave parameter; respectively compare the first quality factor with the first quality factor threshold, and set The second quality factor is compared with the second quality factor threshold; based on the comparison result of the first quality factor and the first quality factor threshold and the comparison result of the second quality factor and the second quality factor threshold, using the first shear wave parameter and / or the second shear wave parameter determines a shear wave velocity estimate. Therefore, the advantages of the fundamental wave signal and the harmonic signal can be fully utilized, so that the estimated value of the shear wave velocity is more accurate.

Description

technical field [0001] The invention relates to the technical field of medical diagnosis, in particular to a shear wave imaging method, device and storage medium. Background technique [0002] New research shows that shear wave elastography (SWE) can significantly reduce the number of liver biopsies performed in patients with chronic hepatitis to confirm the stage of liver fibrosis. The shear wave elastography technique for assessing liver elasticity is based on shear waves generated by internal mechanical thrust. This internal thrust is created by the ultrasound system's transmit beam directly into the liver, called the Acoustic Radiation Force Pulse (ARFI). [0003] As the transmit beam propagates, a portion of the energy is transferred into surrounding tissue by absorption or reflection. In soft tissue, the acoustic radiation force (F) exerted by ultrasound on the tissue is given by: [0004] [0005] α is the absorption coefficient, I is the mean time intensity, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/08A61B8/00G16H30/20
CPCA61B8/085A61B8/5215G16H30/20
Inventor 王鋐曹三张勇张建军
Owner CHISON MEDICAL TECH CO LTD