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Small area 3D passive cavitation imaging and 3D composite imaging method based on area array

A passive cavitation imaging and three-dimensional composite technology, which is applied in the fields of ultrasound/sound wave/infrasonic image/data processing, medical science, and sound wave diagnosis, etc. It can solve the problems of slowing down and unrealistic 3D reconstruction

Active Publication Date: 2017-04-26
XI AN JIAOTONG UNIV
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Problems solved by technology

The traditional single RBF interpolation method does not do any processing on the original 3D volume data. Although the accuracy is very high, the 3D reconstruction speed is greatly slowed down, which is impossible to achieve clinically.

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  • Small area 3D passive cavitation imaging and 3D composite imaging method based on area array
  • Small area 3D passive cavitation imaging and 3D composite imaging method based on area array
  • Small area 3D passive cavitation imaging and 3D composite imaging method based on area array

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Embodiment Construction

[0098] The present invention will be described in detail below with reference to the drawings and embodiments.

[0099] The three-dimensional passive cavitation imaging method involved in the present invention includes the following specific steps:

[0100] Step 1: Calculate the power spectrum estimation of the signal based on the spectrum estimation theory, and set the threshold according to the maximum amplitude of the three-dimensional data collected by the area array to clarify the frequency components to be filtered and reduce the calculation time. Design a multi-cascade adaptive notch system to filter out the high-order and ultra-high-order harmonic components of the n×m channels received by the array array.

[0101] Step 2: Calculate the distance between the scattering point and the array element and the compensation coefficient for signal loss and receiving sensitivity, and use the passive imaging algorithm to calculate the three-dimensional data of the source intensity in th...

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Abstract

The invention provides a method for small-area three-dimensional passive cavitation imaging and three-dimensional composite imaging based on an area array, wherein a two-dimensional passive cavitation imaging algorithm is expanded to a three-dimensional algorithm and a multi-stage continuous self-adaption trapped wave system is designed to research a mechanism of inertial oscillation of a cavitation micro bubble in a sound field, and a dynamic aperture receiving technique is used for further processing of three-dimensional data. Delayed array element receiving of the area array is then disposed to adjust an angle of a passive receiving plane, three-dimensional conversion is carried out on the three-dimensional data and then three-dimensional recombination is carried out on the data in order to realize the three-dimensional passive cavitation imaging. By the method for the small-area three-dimensional passive cavitation imaging and the three-dimensional composite imaging based on the area array provided by the invention, three-dimensional passive cavitation multi-angle compound imaging with high resolution, high signal-to-noise ratio and high efficiency can be obtained, and a selective monitoring manner can be provided for clinical operations by combing the passive cavitation imaging with other techniques.

Description

Technical field [0001] The invention relates to the technical field of ultrasound imaging, in particular to a three-dimensional passive cavitation imaging method suitable for high resolution, high signal-to-noise ratio and high efficiency. Background technique [0002] The High Intensity Focused Ultrasound (HIFU) transducer will produce a cavitation effect near the focal area under the action of the focused sound field. The cavitation effect means that the unstable structure in the liquid is destroyed to produce a cavity (ie, micron level). The kinetic process of expansion, contraction, and collapse generated by the external driving force of bubbles) can be divided into inertial cavitation and non-inertial cavitation according to its physical mechanism. Inertial cavitation refers to the rapid expansion of microbubbles under the action of the negative pressure phase, and the rapid contraction until collapse under the action of the positive pressure phase. During this process, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00
CPCA61B8/4488A61B8/483A61B8/52
Inventor 万明习路舒宽
Owner XI AN JIAOTONG UNIV
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