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Method for estimating intravascular ultrasonic elastography two-dimensional multistage hybrid displacement

A technology of ultrasonic elastography and displacement, applied in the direction of ultrasonic/sonic/infrasonic Permian technology, ultrasonic/sonic/infrasonic image/data processing, catheter, etc.

Active Publication Date: 2014-04-23
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above problems existing in the prior art, to provide a two-dimensional multi-level hybrid displacement estimation method for intravascular ultrasonic elastography, which can well solve the problem of balancing calculation timeliness and accuracy

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  • Method for estimating intravascular ultrasonic elastography two-dimensional multistage hybrid displacement
  • Method for estimating intravascular ultrasonic elastography two-dimensional multistage hybrid displacement
  • Method for estimating intravascular ultrasonic elastography two-dimensional multistage hybrid displacement

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Embodiment Construction

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0044] A two-dimensional hybrid displacement estimation method for intravascular ultrasound elastography, comprising the following steps:

[0045] Step 1) Using a commercial ultrasonic transducer to obtain a frame of two-dimensional radio frequency signals of the biological tissue to be tested before compression;

[0046] Step 2) Hold the ultrasonic transducer and apply a slight squeeze (generally controlled in the order of 1%) to the tissue along the longitudinal direction of the probe to obtain a frame of compressed two-dimensional radio frequency signals;

[0047] Step 3) Calculate the RF signals before and after tissue compression obtained from Step 1 and Step 2, respectively, to obtain baseband analysis data. The specific steps are to downsample the RF data to reduce data points, in order to avoid tissue compression during downs...

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Abstract

The invention discloses a method for estimating intravascular ultrasonic elastography two-dimensional multistage hybrid displacement. The method for estimating the intravascular ultrasonic elastography two-dimensional multistage hybrid displacement is combined with a multistage searching and single-stage tracking method for a data point, and the advantages of reasonably balancing the calculated quantity and calculation precision are achieved. In an algorithm primary stage, a two-dimensional multistage searching method is utilized for acquiring axial offset and cross offset, and searching is prevented from being carried out in the cross direction in an advanced stage. In the advanced stage, a quality guide and zero phase difference tracking method is utilized for estimating axial displacement to reduce the calculated quantity to the maximum extent. The algorithm can be suitable for the real-time imaging requirement of intravascular ultrasonic imaging well, and imaging precision can be improved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic imaging, in particular to a two-dimensional multi-level hybrid displacement estimation method for intravascular ultrasonic elastography. Background technique [0002] Intravascular ultrasound (IVUS) is a new interventional ultrasound imaging technology developed rapidly in the late 1980s that combines non-invasive ultrasound technology and invasive cardiac catheterization technology. It is an inspection method that can provide cross-sectional images of patients' coronary arteries in real time for clinical detection. The specific method is that during the cardiac catheterization process, the ultrasonic probe is sent into the cardiovascular cavity through the guide wire for detection, and then the ultrasonic catheter is withdrawn to observe the size of the lumen, the thickness and shape of the wall structure, etc., and observe its contraction and Diastolic functional changes can also be used for...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/08A61B8/12
Inventor 钱馨然崔崤峣顾天明焦阳吕铁军
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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