Cavitation micro-bubble high signal-to-noise ratio ultrasonic rapidly imaging and dynamic dimension distribution estimating method

Abstract

The invention provides a cavitation micro-bubble high signal-to-noise ratio ultrasonic rapidly imaging and dynamic dimension distribution estimating method, comprising: (1) building a cavitation micro bubble wavelet under a static state starting condition; (2) acquiring information of backscatter Intensity change along time in a solution and in a source energy irradiation volume by a full-digitization ultrasonic two dimension planar-array energy transducer and by a plane wave emission and reception manner, and carrying out micro bubble wavelet transformation on it to raise cavitation micro bubble imaging signal-to-noise ratio; (3) acquiring a radius of micro bubble with a maximum number in a cavitation micro bubble group; (4) dividing a cavitation micro bubble area into sub-areas with a same size, to obtain brightness corresponding to the micro bubble with the maximum number in each sub-area, thereby obtaining dimension distribution of the whole cavitation micro bubble group; and (5) obtaining volume distribution of cavitation micro bubble dimensions under a flow state. The method of the invention carries out cavitation micro bubble wavelet transformation, obtains signal-to-noise ratio enhanced cavitation micro bubble images, and simultaneously, completely dynamic estimation on the cavitation micro bubble dimensions.

Description

technical field [0001] The invention belongs to the technical field of detection acoustics, in particular to a cavitation microbubble high signal-to-noise ratio ultrasonic fast imaging and dynamic size distribution estimation method. Background technique [0002] Cavitation refers to a series of dynamic processes such as oscillation, expansion, contraction and implosion of the cavitation nucleus in a liquid under the action of certain energy (such as ultrasound, microwave, laser, etc.). Cavitation, noise, vibration, and luminescence that occur when cavitation bubbles collapse in a liquid. Cavitation will reduce mechanical efficiency, and in applications such as biomedicine and sonochemistry, the advantages of cavitation can also be exploited. [0003] The size of cavitation microbubbles is regarded as one of the important parameters to measure the cavitation reaction field. Therefore, it is of great value to study the size of cavitation microbubbles in the basic research o...

AI Technical Summary

Problems solved by technology

However, the chaotic nature of the cavitation process makes it difficult to measure the size of cavitation microbubbles.

Existing studies have shown that scholars at home and abroad have mostly studied the estimation methods of cavitation microbubble size through optical methods and sonoluminescence methods, but these methods require relatively high hardware operation requirements and cannot be dynamically measured, which fundamentally limits the cavitation Dynamic determination of the size distribution of microvesicle populations

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