Transducer array for high-intersity focusing ultrasonic tumor treatment

Abstract

A transducer array for high-intensity focused ultrasound tumor treatment belongs to the field of medical equipment. The present invention is composed of a matching layer and a piezoelectric ceramic sheet. The matching layer is a concave spherical thin-shell bowl-shaped acoustic radiation layer with uniform thickness. All piezoelectric ceramic sheets are glued on the outer surface of the same matching layer. Multiple identical Piezoelectric ceramic sheets constitute a large-aperture co-concave spherical compact mosaic transducer array. The invention has a high array focused sound intensity ratio and symmetrical focused sound field characteristics; the piezoelectric ceramic sheet area of ​​each array element is small, and the manufacturing cost is low; the number of array elements and the number of power amplifier channels are small, and the power amplifier, phase shifting The consistency of the transducer and the matching network is easier to realize, manufacture, and adjust, and the stability and reliability are greatly improved; the common matching layer provides a firm support for the transducer array element, and resonant reinforcement occurs together with the array element The consistency of the resonance of each array element is ensured, and the output sound power of the array is maximized.

Description

technical field [0001] The invention relates to a transducer array, in particular to a transducer array for high-intensity focused ultrasound tumor treatment, belonging to the field of medical equipment. Background technique [0002] Ultrasound transducers or transducer arrays are the core components of high-intensity focused ultrasound tumor therapy systems. It can convert electrical energy into ultrasonic energy and focus it to form a high-intensity focal area or focal spot, which can generate high temperature in the target tissue (tumor) and kill cancer cells. The quality of its performance is directly related to the therapeutic effect, safety and reliability, and has extremely important significance. The usual HIFU focusing transducer system is divided into two types: unit transducer and multi-element transducer array. There are two types of unit transducers: lens type and curved surface self-focusing type. The former uses a large-aperture planar disk piezoelectric ce...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a transducer array for high-intensity focused ultrasound tumor therapy, which can meet the requirements of forming a sound field characteristic similar to that of a large-aperture focusing transducer and overcome the large-aperture focused transducer array. The concave spherical thin-shell piezoelectric ceramic elements required by the aperture unit transducer are difficult to manufacture, and the number of transducer array elements can not be too large, avoiding the problems caused by a large number of array elements mosaiced to form a concave spherical focusing transducer array. Consistency, stability, complexity and other issues, with high engineering reliability and performance / price ratio

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