Echo displacement detecting method and imaging method based on sound radiation force

An acoustic radiation force and displacement detection technology, applied in ultrasonic/acoustic/infrasound image/data processing, echo tomography, acoustic diagnosis, etc.

Active Publication Date: 2015-02-25
SASET CHENGDU TECH LTD
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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:

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  • Echo displacement detecting method and imaging method based on sound radiation force
  • Echo displacement detecting method and imaging method based on sound radiation force
  • Echo displacement detecting method and imaging method based on sound 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

[0072] 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:

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

[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 met...

Embodiment 3

[0086] 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 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 a displacement detection method based on acoustic radiation force echo and an imaging method. 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 kind of vibroelastic imaging, which uses short-term focused acoustic pulses to act on tissue ROI (region of interest, region of interest) ), causing it to produce instantaneous, micron-scale displacements while emitting a sequence of acoustic pulses to detect tissue displacements. The magnitude of the displacement...

Claims

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Application Information

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Patent Type & Authority Applications(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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