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Shear wave elastic imaging method and system

An elastic imaging and shear wave technology, applied in the field of ultrasonic scanning, can solve the problem of uneven intensity distribution and achieve the effect of uniform intensity distribution

Active Publication Date: 2021-05-14
CHISON MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem of uneven intensity distribution at multiple focus positions of the ultrasonic probe during shear wave elastography in the prior art, thereby providing a shear wave elastography method and system

Method used

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  • Shear wave elastic imaging method and system

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Embodiment 1

[0055] Acoustic waves propagate through tissue much faster (approximately 1000 times) than shear waves, so the propagation of shear waves in tissue in the transverse direction can be fully tracked. By measuring the shear wave velocity in the region of interest, it is possible to provide Two-dimensional quantitative elastograms of tissue. A very high frame rate for motion detection is required for this, since shear wave velocities are typically on the order of meters per second, and to obtain shear wave elastography, an ultrasound system needs to send a tracking signal to the tissue and receive the backscattered echoes, which can Dynamic excitation is delivered to generate shear waves in vivo, and shear wave propagation velocity is detected by repeatedly sending tracking pulses to the body using the same imaging transducer and receiving reflected signals to monitor tissue displacement.

[0056] In practical applications, the ultrasonic waves emitted by the ultrasonic probe arra...

Embodiment 2

[0089] An embodiment of the present invention provides a shear wave elastography system, such as Figure 8 shown, including:

[0090] The focal sound pressure acquisition module 1 is used to obtain the sound pressure component p of the ultrasonic wave emitted by the ultrasonic probe at each focal position, wherein the required number of focal points, focal point positions and acoustic Pressure distribution, the focal point includes at least two; this module executes the method described in step S1 in Embodiment 1, which will not be repeated here.

[0091] The array element sound pressure acquisition module 2 is used to acquire the sound pressure h generated by each array element in the ultrasonic probe at each focus position; this module executes the method described in step S2 in Embodiment 1, and is not described here Let me repeat.

[0092] The sound pressure weight acquisition module 3 is configured to acquire the sound pressure weight w; the module executes the method d...

Embodiment 3

[0097] An embodiment of the present invention provides a computer device, such as Figure 9 As shown, the device may include a processor 51 and a memory 52, wherein the processor 51 and the memory 52 may be connected via a bus or in other ways, Figure 9 Take connection via bus as an example.

[0098]As a non-transitory computer-readable storage medium, the memory 52 can be used to store non-transitory software programs, non-transitory computer-executable programs and modules, such as corresponding program instructions / modules in the embodiments of the present invention. The processor 51 executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions and modules stored in the memory 52, that is, implements the shear wave elastography method in the first method embodiment above.

[0099] The memory 52 may include a program storage area and a data storage area, wherein the program storage area may store...

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Abstract

The invention discloses a shear wave elastic imaging method and system. The method comprises the following steps: obtaining sound pressure components p of ultrasonic waves emitted by an ultrasonic probe at all focus positions, determining the number of needed focuses, the focus positions and sound pressure distribution according to the size of a target area expected for shear wave elastic imaging, wherein the number of the focuses is at least two; acquiring sound pressure h generated by each array element in the ultrasonic probe at each focus position; acquiring a sound pressure weight w; and acquiring the intensity q of each array element according to the sound pressure component p at each focus position, the sound pressure h generated by each array element at each focus position and the sound pressure weight w. When the intensity q of each array element meets a preset condition, the ultrasonic probe is controlled to carry out shear wave elastic imaging according to the intensity q of each array element, according to the method and the system provided by the invention, the ultrasonic intensity at the plurality of focus positions is controlled to be uniformly distributed, and the shear wave elastic imaging with good quality is generated in the to-be-detected tissue.

Description

technical field [0001] The invention relates to the technical field of ultrasonic scanning, in particular to a shear wave elastography method and system. Background technique [0002] Recent studies have shown that shear wave elastography can significantly shorten liver biopsies for liver fibrosis in patients with chronic hepatitis. The shear wave elastography technique used to assess liver elasticity is based on shear waves generated by an internal mechanical push It is generated by the ultrasound system and directly enters the liver. The pulse length usually needs to be 100μs in duration to produce such as figure 1 Shown is a shear wave, a shear wave is a mechanical wave that can be generated from a focal point propagating in a transverse direction. [0003] Since shear waves attenuate as they travel laterally, one focus can only cover an area of ​​a certain width, say about a centimeter; if the ROI (region of interest) is a few centimeters wide, the foci will be repeated...

Claims

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Application Information

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IPC IPC(8): A61B8/00
CPCA61B8/48
Inventor 王鋐陈建军
Owner CHISON MEDICAL TECH CO LTD
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