In the manufacturer of piezoelectric ceramic sheets, the fabrication cost of a large-aperture curved self-focusing piezoelectric ceramic sheet can be up to 10000 yuan. The manufacturing of a single chip small-area planar piezoelectric ceramic requires only tens of dollars to several hundred yuan. Another,In addition, during the course of HIFU piezo ceramic treatment, sound energy of the patient area of the skin is too high and the angle of incidence is too large.For other reasons, the skin absorbs a lot of sound energy, which eventually causes skin burns in the clinic.It will bring great pain to the patient. Therefore, the purpose of this Hifu piezoelectric ceramic transducer is to design a two-dimensional multi-array spherical crown array probe with a large spherical filling rate and sufficient practicality in consideration of the cost of probe fabrication.
To investigate the research status, analysis and summary of HIFU therapeutic probes, and propose two-dimensional high-intensity focused ultrasound.It is the research program goals and significance of the resonant frequency HIFU piezoelectric.
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The structural design platform of two-dimensional high-intensity focused ultrasound is introduced. In this chapter, we present a new type of spherical crown treatment ultrasound array arrangement. And the corresponding ultrasonic array model is established. In addition, the far-field sound field simulation platform for ultrasonic hifu piezoelectric crystal treatment array is built. Finally, based on the sound field simulation platform, the structural characteristics of the spherical crown are array elements,it is F-number versus sound field. The effects of the characteristics were studied theoretically.Based on the array structure design platform described. we designed a 125-channel therapeutic ultrasound probe. A set of quick and operative probe package designs schemes and a related platform, and a 125-channel therapeutic ultrasonic high-focus piezoelectric ceramics was finally produced. Performance tests were performed on 125-channel therapeutic ultrasound probes, including electrical performance tests and acoustic performance tests. The fifth chapter summarizes the content and deficiencies of the thesis work, and put forward the prospect of this topic.