Ultrasonic transducer and preparation method thereof

Abstract

The invention relates to the technical field of medical ultrasonics, and discloses an ultrasonic transducer and a preparation method thereof. The ultrasonic transducer comprises a housing; a piezoelectric layer is arranged in the housing, and comprises at least two piezoelectric array elements; the frequency space between the two piezoelectric array elements is 50 kHz to 1.2 MHz; and an acoustic lens is arranged at the front end of the piezoelectric layer, and is used for ensuring that the piezoelectric array elements at different frequencies are confocal. The ultrasonic transducer can receiveexcitation signals of two or more frequency components, on the premise of not increasing the power loss, the ultrasonic cavitation effect is enhanced, and the ultrasonic transducer adopting the structure is convenient to prepare and low in cost. The treatment effect can be enhanced, the feasibility is high, and a good treatment effect can be obtained when the ultrasonic transducer is applied to blood brain barrier opening, ultrasonic thrombolysis, ablation treatment, nerve regulation and the like.

Description

technical field [0001] The invention relates to the technical field of medical ultrasound, in particular to an ultrasonic transducer and a preparation method thereof. Background technique [0002] Medical ultrasound technology has been widely used in clinical diagnosis and treatment. Ultrasound diagnosis mainly uses ultrasound echoes to obtain imaging information of tissues, and provides necessary diagnostic references for clinicians. Ultrasound therapy uses the mechanical effect, thermal effect and cavitation effect of ultrasound to treat diseases. Specifically, it can be divided into high-dose ultrasonic thermal ablation technology and low-dose ultrasonic regulation technology. High Intensity Focused Ultrasound (HIFU) is a typical ultrasonic thermal ablation technology. HIFU can penetrate tissues and reach the set target area to destroy tumors in the body, and finally absorb the destroyed tumors through the body's own immune system , to achieve the effect of non-invasiv...

AI Technical Summary

Problems solved by technology

The high-frequency piezoelectric wafers are on the same spherical surface and are confocal. However, because the frequency difference is large and the wafer thicknesses are different, it is difficult to ensure two The wafers are on the same spherical surface, so it is difficult to ensure that the focal points of the two are at the same position

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