Ultrasonic focusing lens based on planar artificial structure

Abstract

The invention provides an ultrasonic focusing lens based on a planar artificial structure. An acoustic soft material plate is provided with, at upper and lower surfaces, circular portions and a plurality of concentric annular portions continuously arranged around the corresponding circular portions. The adjacent annular portions have different thicknesses. The circular portions at the upper and lower surfaces and the annular portions at the upper and lower surfaces are symmetrical up and down relative to the central horizontal line of the acoustic soft material plate. Silica gel covering layers cover the upper and lower surfaces of the acoustic soft material plate so that the ultrasonic focusing lens has a uniform total thickness. The thickness of each annular portion is related to the focal length of the ultrasonic focusing lens. The planar focusing lens of the invention can regulate the focusing of the acoustic wave. In cooperation with a planar ultrasonic probe, the ultrasonic focusing lens can generate a focusing ultrasonic sound field and can accurately control a focusing depth to realize a single-point and multi-point focusing effect with different depths so as to achieve ultrasound stimulation on areas at different depths of an object, and is easy to operate, low in cost, and flexible to use.

Description

technical field [0001] The invention relates to the field of ultrasonic transducers, in particular to an ultrasonic focusing lens based on a planar artificial structure. Background technique [0002] In recent years, the clinical application of ultrasound is no longer limited to image diagnosis, and the therapeutic effect of ultrasound on tumors and brain diseases has gradually become a hot spot in modern medical research. HIFU treatment uses high-intensity focused ultrasound to induce instantaneous hyperthermia, causing tumor tissue to coagulate and necrosis extremely quickly, so that it can be used for tumor thermal treatment; in neuromodulation research, focused sound fields can accurately stimulate nerve nuclei and effectively regulate neural circuits. It provides an important means for the pathogenesis and treatment of brain functions such as Parkinson's and depression. Therefore, focusing the sound field is of great significance for studying the treatment of ultrasoun...

AI Technical Summary

Problems solved by technology

At present, in the research laboratories of ultrasonic therapy in the world, commercial ultrasonic concave spherical focusing transducers are basically used for related experimental research, and each focused ultrasonic transducer has a fixed focal length and focal spot, so in order to meet different To meet the needs of research, each laboratory needs to purchase different types of commercial focused ultrasound transducers, and the economic cost is relatively high

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