Annular self-focusing ultrasonic phased array energy converter

Abstract

The invention discloses an annular self-focusing ultrasonic phased array energy converter. The energy converter comprises a crown-shaped spherical shell and a plurality of annular-sector piezoelectricceramic wafers, wherein a round hole is formed in the center of the crown-shaped spherical shell to bring convenience to installing a B-mode ultrasound probe, the plurality of the annular-sector piezoelectric ceramic wafers are bonded on the concave spherical surface of the crown-shaped spherical shell to be spliced into a ring shape, the plurality of the annular-sector piezoelectric ceramic wafers can form a group of concentric rings, the central lines of the concentric rings coincide with the central line of the crown-shaped spherical shell, and each annular-sector piezoelectric ceramic wafer is connected with an independent control end. Therefore, independent control on each annular-sector piezoelectric ceramic wafer is ensured; furthermore, the annular self-focusing ultrasonic phasedarray energy converter has the advantages of changeable focal length, single-point focusing mode, multi-point focusing mode and the like. In medical treatment, the phased array energy converter can effectively avoid bones on an ultrasound channel, prevents the bones from absorbing ultrasonic energy and tissues from being damaged and reduces patient pain.

Description

technical field [0001] The invention relates to the field of medical high-intensity ultrasonic treatment systems, in particular to an annular self-focusing ultrasonic phased array transducer. Background technique [0002] High Intensity Focused Ultrasound (HIFU for short) technology is a non-invasive surgical technique that has flourished 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. At present, the single-array-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 focus scanning needs to be completed by mechanical movement. When treating some tumors, ultrasonic energy will be absorbed by the b...

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a ring-shaped self-focusing ultrasonic phased array transducer, which can solve the problem that in the prior art, due to the single focusing form of the transducer, during treatment, ribs on the acoustic channel are removed for treatment, or During direct treatment, the bones located on the sound propagation path will absorb a large amount of ultrasonic energy, causing bone damage, and causing huge physical and psychological pain to the patient.

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