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Ultrasonic nonlinear quantitative real-time imaging method and system

A real-time imaging, nonlinear coefficient technology, applied in ultrasonic/sonic/infrasonic diagnosis, sonic diagnosis, infrasonic diagnosis, etc.

Active Publication Date: 2018-05-01
SASET CHENGDU TECH LTD
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Problems solved by technology

However, no matter whether the fundamental wave signals under two sets of voltage conditions are used for qualitative parameter imaging, or the fundamental wave signals and harmonic signals under one set of voltage conditions are used to perform imaging function operations to generate images, they are not directly related to nonlinear parameters. Correlation, so the acquired image can only qualitatively reflect the influence of nonlinear parameters

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  • Ultrasonic nonlinear quantitative real-time imaging method and system
  • Ultrasonic nonlinear quantitative real-time imaging method and system
  • Ultrasonic nonlinear quantitative real-time imaging method and system

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[0040] In the following, the present invention will be further described in detail in conjunction with the accompanying drawings and embodiments, so as to make the purpose, technical solutions and advantages of the present invention more clear. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] Sound waves propagate in the form of longitudinal waves in nonlinear media. In the compression stage of the longitudinal wave, the particle density of the medium increases, and the sound pressure increases, which leads to an increase in the activity of the particles around the particle, which is manifested as an increase in the wave propagation speed on a macroscopic scale; on the contrary, in the sparse stage of the longitudinal wave, the density of the medium decreases, The sound pressure is reduced, causing the wave to travel faster. The accumulation of nonlinear effects in...

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Abstract

The invention discloses an ultrasonic nonlinear quantitative real-time imaging method and system. Ultrasonic images which are directly related to nonlinear parameters can be generated, information inthe images can be quantified, influence of nonlinear parameters to the ultrasonic images can be reflected accurately, and thus, diagnosis based on the ultrasonic images can be assisted objectively. The system comprises a probe array element, a wave beam synthesizer, an echo signal processor, a nonlinear coefficient calculator, a scanning converter, a colorful encoder, a memory and a display whichare connected successively; and the nonlinear coefficient calculator is used for constructing a nonlinear coefficient function which takes a nonlinear coefficient as an unknown number according to a normalized amplitude ratio of a fundamental wave signal and a harmonic signal, and the nonlinear coefficient is acquired by estimation of an initial value and iterative solution.

Description

technical field [0001] The invention relates to the technical field of ultrasonic imaging, in particular to an ultrasonic nonlinear quantitative real-time imaging method and system. Background technique [0002] Medical ultrasound imaging systems are suitable for clinical diagnosis of organs and tissues such as liver, kidney, and breast. Usually, the theoretical basis of the medical ultrasound system is based on a simplified linear acoustic physical model, that is, under the assumption of small amplitude waves, the wave equation is linearly approximated, and the nonlinear effect of sound waves propagating in the medium is ignored. In the real world, however, all sound-transmitting media have some degree of nonlinearity. With the increase of the frequency and intensity of the transmitted ultrasonic signal, under the condition of limited amplitude, there will be non-negligible nonlinear effects in the ultrasonic system, which means that higher harmonic components will appear ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/00
CPCA61B8/5207
Inventor 尹皓石丹刘东权
Owner SASET CHENGDU TECH LTD
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