Spherical self-focusing ultrasonic phased array transducer

Abstract

The invention discloses a spherical self-focusing ultrasonic phased array transducer which comprises a spherical shell piezoelectric ceramic chip, first wires and second wires. The convex surface of the spherical shell piezoelectric ceramic chip contains a plurality of first regional blocks, and the surface of each first regional block is covered with a silver coating. The first regional blocks are connected with one ends of the plurality of first wires in a one-to-one correspondence manner. The other end of each first wire is used as an independent control end. The concave surface of the spherical shell piezoelectric ceramic chip is connected with one end of each second wire. The other end of each second wire is used as a common end. The wiring mode ensures independent control on each first regional block on the spherical shell piezoelectric ceramic chip, and enables the transducer to have the advantages of variable focal length, single-point / multi-point focusing, and the like. In medical treatment, the phased array transducer can effectively avoid the bones on the acoustic channel and prevent the bones from absorbing ultrasonic energy to damage tissues, thus reducing the pain ofpatients.

Description

technical field [0001] The invention relates to a medical high-intensity ultrasonic treatment system in the field, in particular to a spherical self-focusing ultrasonic phased array transducer. Background technique [0002] High-intensity focused ultrasound technology is a non-invasive surgical technique that has developed vigorously in recent years, and has been widely used and promoted in clinical medicine. Because it is non-invasive, harmless, safe, effective and can ensure the safety and integrity of tissues during the treatment process, it has attracted the attention and attention of many universities and research institutions at home and abroad. [0003] At present, the single-element focusing transducer is widely used. This type of transducer has the advantages of simple structure and low price. However, its focusing form is single, and the focus scanning needs to be completed by mechanical movement, so the treatment time is too long. And in the treatment of liver tu...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a spherical self-focusing ultrasonic phased array transducer, which can solve the problem that the ribs on the acoustic channel absorb a large amount of ultrasonic energy due to the single focusing form of the transducer in the prior art, resulting in burns to the human body, or Ribs need to be removed during treatment, which causes great physical and psychological pain to the patient.

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