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Ultrasonic shear wave elastography based on dynamic aperture control

A technology of elastography and dynamic aperture, applied in the directions of ultrasonic/sonic/infrasonic image/data processing, ultrasonic/sonic/infrasonic diagnosis, ultrasonic/sonic/infrasonic Permian technology, etc. Accurate and other issues, to achieve the effect of improving measurement accuracy and eliminating false displacement

Inactive Publication Date: 2017-10-31
THE THIRD AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIV OF PLA
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Problems solved by technology

[0004] The present application provides an ultrasonic shear wave elastography method based on dynamic aperture control, and dynamically controls the aperture size for different measurement depths to obtain a good displacement-time curve to solve the problem of shear wave elastography at shallow focus depths in the prior art. Technical problem with inaccurate shear wave propagation speed

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  • Ultrasonic shear wave elastography based on dynamic aperture control
  • Ultrasonic shear wave elastography based on dynamic aperture control
  • Ultrasonic shear wave elastography based on dynamic aperture control

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Embodiment

[0036] A method of ultrasonic shear wave elastography based on dynamic aperture control, comprising the following steps:

[0037] S1: At different focusing depths z, the shape of the acoustic radiation force field is controlled by adjusting the aperture width D of the ultrasonic transducer to eliminate the acoustic radiation force grating lobes, that is, as the focusing depth z becomes larger, the ultrasonic transducer’s The aperture width D is increased, the concentration depth z becomes smaller, and the aperture width D of the ultrasonic transducer is adjusted to be smaller;

[0038] Dynamic aperture control is a common technique used in receiving echo signals, and in conventional ultrasound imaging systems the physics and mathematics of focusing the transmit and receive electrons are the same. Therefore, the present invention utilizes the dynamic aperture control similar to the receiving mode of the conventional ultrasonic imaging system to realize the dynamic focusing in t...

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Abstract

The invention provides an ultrasonic shearing wave elastic imaging method based on dynamic aperture control. Array elements of which the number corresponds to different focus depths are started, the aperture is set up, grating lobe phenomena and false displacement in a displacement field can be effectively eliminated, an obtained mass point displacement-time curve relatively well meets the rule that a single point triggered shearing wave is attenuated along with time, and the shearing wave transmission speed measurement accuracy can be improved. By using the ultrasonic shearing wave elastic imaging method, the technical problems that in the prior art in shallow focus depth, because of the influence of acoustic radiation force grating lobe, a mark point displacement-time curve is deformed and the shearing wave transmission speed measurement accuracy is degraded can be solved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic elastography, in particular to an ultrasonic shear wave elastography method based on dynamic aperture control. Background technique [0002] Ultrasound elastography is an emerging technology for the purpose of detecting the elasticity information of biological tissues. Its imaging principle is to use the acoustic radiation force (ARF) generated by focused ultrasound to excite biological tissues. The deformation difference is used to solve the elastic coefficient, and then elastography. According to the way the acoustic radiation force is applied, ultrasound elastography can be divided into three categories: quasi-static methods, such as Acoustic Streaming in Diagnostic Ultrasound (ASIDU) in diagnostic ultrasound; transient methods, such as Acoustic Radiation Force Imaging (AcousticRadiation Force Impulse Imaging, ARFII), Shear Wave Elasticity Imaging (SWEI), Ultrasonic Shear Imaging (SSI); Har...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00A61B8/08
Inventor 朱新建吴若愚陆彦邑何庆华吴宝明
Owner THE THIRD AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIV OF PLA
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