Wide focal domain phased array focusing ultrasonic transducer

A focused ultrasound and phased array technology, which is applied in the field of biomedical engineering, can solve the problems of inappropriateness, limited focus area, and non-conformity, etc., and achieve the effect of excellent performance, compact structure, and ordinary material selection

Inactive Publication Date: 2006-05-24
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

"This technology has obvious shortcomings: the phased array transducer can only form a limited "focus area", which is not conformal, and the focus area is limited. For tumor tissues with a certain shape and size, it must be sequentially Focus and radiation can completely cover the entire lesion tissue
Therefore, it is not suitable for directed conformal heating of larger lesions

Method used

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  • Wide focal domain phased array focusing ultrasonic transducer

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Embodiment Construction

[0013] In order to better understand the technical solutions of the present invention, a further detailed description will be made below in conjunction with the accompanying drawings and embodiments. The technical parameters used in the examples do not limit the present invention.

[0014] The large focal area phased array focused ultrasonic transducer of the present invention is composed of a large-aperture rigid spherical crown 1 and N discretely distributed ultrasonic transducer units—array elements 2, using spherical, regular, and equiangularly spaced rings Array structure, the initial array elements of each ring are randomly positioned.

[0015] The spherical geometric radius R=L of the large-aperture rigid spherical body 1 1 +L 2 , where L 1 is the thickness of the outer water bladder of the large focal area phased array focused ultrasound transducer, L 2 is the maximum depth to be treated.

[0016] The spherical geometric radius R of the large-aperture rigid spheri...

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Abstract

The present invention relates to a large focal field phase-controlled array focusing ultrasonic transducer. It is formed from a large-aperture rigid spherical crown body and several plane ultrasonic transducer array elements. Said invention also provides the distribution and arrangement mode of all the array elements, every array element has an independent electric actuating signal feeder, and respectively connected to phase-controlled signal activation system, the frequencies of all the array element actuating signals are identical, and their phases and voltage amplitudes are different, said invention utilizes regulation and control of actuating phases and amplitudes of all the array elements to implement electronic focusing and scanning and produce multifocus sound field distribution with several modes so as to further form focal field with required shape and size and provide ultrasonic energy required for heating target tissue, and can ensure that the target tissue has uniform heat dose distribution and can directionally heat the deep tumor focus of human body.

Description

technical field [0001] The invention relates to an ultrasonic transducer, in particular to a large focal region phased array focused ultrasonic transducer, which is applied to a large focal region phased focused ultrasonic system for heating deep tumor lesions, and belongs to the technical field of biomedical engineering. Background technique [0002] The large focal area phased array focused ultrasound transducer is one of the key components of the large focal area phased focused ultrasound system for heating deep tumor lesions. It can not only penetrate the ultrasonic energy with low radiation power into human tissue through external emission, and gather it in the set focal area to form a high sound intensity area, but also can control the excitation phase and amplitude of each array element in it. , to generate multi-mode multi-focus sound field distribution, and then form the desired shape (circle, ring and other regular shapes and arbitrary irregular shapes) and the siz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N7/02B06B3/04
Inventor 陈亚珠倪养华
Owner SHANGHAI JIAO TONG UNIV
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