Research progress of flexible ultrasonic transducer in biomedicine
Traditional ultrasonic transducer has the disadvantages of large size and rigid surface,which can not be used in the design of complex skin surface and wearable devices.In order to make the transducer flexible,small size,to meet the characteristics of wearable,the piezoelectric components,electrodes and packaging and other components of the flexible transducer.Compared with the traditional transducer,it has two advantages:Firstly,do not need professional operation,and can achieve continuous ultrasonic monitoring or treatment.Secondly,the sound field is expanded through more comprehensive skin surface coverage.In terms of ultrasonic diagnosis,improve acoustic signal acquisition to obtain more comprehensive information;In terms of ultrasonic therapy,increasing the sound energy deposition can improve the curative effect.Flexible transducers will diversify ultrasound medical applications,allowing patients to diagnose or treat continuously.In this paper,firstly the latest advances in design and processing are reviewed,then its application in diagnosis and treat-ment is emphasized,and finally,the challenges in this field are discussed and the development prospects are prospected.
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