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Echo displacement detection system and imaging system based on acoustic radiation force

An acoustic radiation force and displacement detection technology, applied in ultrasonic/acoustic/infrasonic Permian technology, ultrasonic/sonic/infrasonic image/data processing, acoustic diagnosis, etc., can solve system noise and organism's own motion interference, etc. question

Active Publication Date: 2016-09-28
SASET CHENGDU TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Echo displacement detection system and imaging system based on acoustic radiation force
  • Echo displacement detection system and imaging system based on acoustic radiation force
  • Echo displacement detection system and imaging system based on acoustic radiation force

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Embodiment 1

[0062] Embodiment 1: as figure 1 As shown, the purpose of this embodiment 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 provide a method for detecting echo displacement based on acoustic radiation force:

[0063] Including the step S011 of performing linear interpolation on the echo signal corresponding to the excitation pulse signal. During the ultrasonic radiation force detection process, the single pulse sequence includes a reference detection pulse, an excitation pulse (long pulse), and a detection pulse (short pulse), There are echo signals corresponding to the above pulses in the echo signal, but the echo signal corresponding to the excitation pulse (long pulse) has no calculation value due to the interference of the emitted 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, ...

Embodiment 2

[0074] Embodiment 2: as figure 2 As shown, in order to overcome the existing medical ultrasonic acoustic radiation force imaging, which generally only provides displacement imaging at a fixed time, the diagnostic information generated by the acoustic radiation force imaging and the flicker effect introduced by the system electronic noise and speckle noise in the ultrasonic image cannot be fully utilized. It 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:

[0075] Including the step S100 of detecting the acoustic radiation force echo signal;

[0076] Including step S200 of sequentially performing signal amplification, analog-to-digital conversion, and quadrature demodulation on the echo signal;

[0077] Including the step S300 of detecting the displacement of the echo signal by using the displacement detection met...

Embodiment 3

[0088] Embodiment 3: as Figure 5As shown, the present 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 for performing linear interpolation on the echo signal corresponding to the excitation pulse signal, and in the ultrasonic radiation In the process of force detection, the single pulse sequence contains reference detection pulse, excitation pulse (long pulse) and detection pulse (short pulse). The echo signal corresponding to the long pulse) has no calculation value due to the interference of the emitted long wave, so it needs to be removed and replaced by ...

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Abstract

The invention discloses an echo displacement detection system based on acoustic radiation force and an echo displacement imaging system thereof, and an invalid echo corresponding to an exciting pulse signal is removed by linear interpolation; a time sampling window is adjusted according to the smoothness index adaptation of the echo; the average displacement speed of the echo is calculated in the time sampling window by adopting two-dimensional self-correlation Loupas algorithm to obtain the specific displacement of the echo in time direction; the interference information of the echo displacement caused by organization movement is eliminated by a motion filtering method such that the displacement detection has higher reliability and stronger noise immunity. The imaging system comprises the displacement detection system and can provide multi-mode acoustic radiation force imaging related with organization viscoelasticity, at the same time, interference generated by electronic noise is removed through relevant frame treatment to steadily display the images, the display resolution of the image is enhanced by a contrast stretching method and the pressure information is supplied for acoustic radiation force imaging under the present operating status, thus a doctor can analyze and safely operate the images.

Description

technical field [0001] The invention relates to the field of medical ultrasonic imaging, in particular to a displacement detection system and an imaging system based on acoustic radiation force echo. Background technique [0002] Medical ultrasound vibroelastography was invented by Fatemi and Greenleaf in 1998. This technology uses an ultrasonic field to generate a low-frequency vibration and acts on the tissue under examination. The tissue is excited to produce different vibration amplitudes according to its own elastic modulus, and finally displayed through the image. Acoustic radiation force impulse imaging (ARFI) using acoustic radiation force excitation is a type of vibroelastic imaging, which uses short-term focused acoustic pulses to act on tissue ROI (region of interest) , so that it produces instantaneous, micron-scale displacement and simultaneously emits a sequence of acoustic pulses to detect tissue displacement. The magnitude of the displacement depends on tis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/08
CPCA61B8/08A61B8/4416A61B8/5246
Inventor 石丹尹皓肖有平刘东权
Owner SASET CHENGDU TECH LTD
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