Method for small-area three-dimensional passive cavitation imaging and three-dimensional composite imaging based on area array

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 produced 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 m...

AI Technical Summary

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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