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Displacement Detection Method and Imaging Method Based on Acoustic Radiation Force Echo

An acoustic radiation force and displacement detection technology, which is applied in ultrasonic/acoustic/infrasonic image/data processing, echo tomography, acoustic wave diagnosis, etc., can solve problems such as system noise and organism's own motion interference

Active Publication Date: 2016-07-06
SASET CHENGDU TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to overcome the problem that the echo is easily disturbed by the system noise and the body's own motion (such as heartbeat, breathing), and provides a method for detecting echo displacement based on acoustic radiation force:

Method used

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  • Displacement Detection Method and Imaging Method Based on Acoustic Radiation Force Echo
  • Displacement Detection Method and Imaging Method Based on Acoustic Radiation Force Echo
  • Displacement Detection Method and Imaging Method Based on Acoustic Radiation Force Echo

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Embodiment 1

[0062] Example 1: Such as figure 1 As shown, the purpose of this embodiment is to overcome the problem that the echo is easily interfered by system noise and the body's own motion (such as heartbeat, breathing), and provide an echo displacement detection method based on acoustic radiation force:

[0063] The step S011 includes linear interpolation of the echo signal corresponding to the excitation pulse signal. In the ultrasonic radiation force detection process, the single pulse sequence includes the reference detection pulse, the excitation pulse (long pulse), and the detection pulse (short pulse), The echo signal has the echo signal corresponding to the above-mentioned pulse one-to-one, but the echo signal corresponding to the excitation pulse (long pulse) has no calculation value due to the interference of the transmitted long wave, so it needs to be removed and linear interpolation is used If the number of pulse repetitions (sampling volume) in the time direction is 24, the ...

Embodiment 2

[0072] Example 2: Such as figure 2 As shown, in order to overcome the existing medical ultrasound acoustic radiation force imaging generally only provides displacement imaging at a fixed time, and fails to make full use of the diagnostic information generated by acoustic radiation force imaging and the flicker effect introduced by system electronic noise and speckle noise in ultrasound images. This will greatly reduce the image resolution and make clinical diagnosis extremely difficult. This embodiment provides an imaging processing method for detecting tissue displacement based on acoustic radiation force:

[0073] Including step S100 of detecting echo signals of acoustic radiation force;

[0074] Including step S200 of sequentially performing signal amplification, analog-to-digital conversion, and quadrature demodulation on the echo signal;

[0075] Including the step S300 of detecting the displacement of the echo signal by using the displacement detection method as described in E...

Embodiment 3

[0086] Example 3: Such as Figure 5 As shown, this embodiment provides an echo displacement detection system based on acoustic radiation force, including a control module 1, a linear interpolation module 2, an echo displacement rate calculation module 3, and an echo displacement calculation module 4; the linear interpolation module 1. The echo displacement rate calculation module 2, and the echo displacement calculation module 3 are respectively connected to the control module 1; the linear interpolation module 2 is used to linearly interpolate the echo signal corresponding to the excitation pulse signal, which is used in the ultrasonic radiation In the force detection process, the single pulse sequence includes reference detection pulse, excitation pulse (long pulse), detection pulse (short pulse), and the echo signal has an echo signal corresponding to the above-mentioned pulse one-to-one, but it is the same as the excitation pulse ( The echo signal corresponding to the long p...

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Abstract

The invention discloses an echo displacement detecting method and imaging method based on sound radiation force. Linear interpolation is used for removing the invalid echo corresponding to an drive pulse signal; a time sampling window is adjusted in a self-adaptive mode according to the smoothness index of the echo; a two-dimensional self-correlation Loupas algorithm is used for calculating the average displacement speed of the echo in the time sampling window, and the specific displacement of the echo in the time direction is obtained; a movement filtering manner is used for eliminating the interference information, brought by the tissue movement, on the echo displacement, the reliability of displacement detection is higher, and the noise-resistance capability is higher. The imaging method includes the displacement detecting method, multi-mode sound radiation force imaging correlated to the organization visco-elasticity can be provided, meanwhile, frame correlation processing is adopted for removing the interference generated by electronic noise so that image displaying can be more stable, the display resolution of a stretched and strengthened image is compared, the pressure information in the current working state is provided for sound radiation force imaging, and a doctor can conveniently analyze the image and safely operate.

Description

Technical field [0001] The invention relates to the field of medical ultrasound imaging, in particular to an echo displacement detection method and imaging method based on acoustic radiation force. Background technique [0002] Medical ultrasound vibration elastography was invented in 1998 by Fatemi and Greenleaf. This technology uses an ultrasonic field to generate a low-frequency vibration and act on the tissue to be examined. The tissue is excited to produce different vibration amplitudes according to its own elastic modulus, which is finally displayed through the image. Acoustic radiation impulse imaging (ARFI) using acoustic radiation force excitation is a type of vibrational elastography. This technology uses short-term focused sound pulses to act on tissue ROI (region of interest) to produce instantaneous, Micron-level displacement simultaneously emits acoustic pulse sequences to detect tissue displacement. The amount of displacement depends on the elasticity of the tiss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/08
CPCA61B8/08A61B8/14A61B8/5207A61B8/5223A61B8/5276
Inventor 尹皓石丹肖有平刘东权
Owner SASET CHENGDU TECH LTD
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