Ultrasonic biopsy needle based on the class IV flextensional configuration

Abstract

Abstract-This study builds on previous research by the authors, where the design of a miniaturized class IV transducer configuration and adaption for including an end-effector for use in biopsy are investigated. Device design has focused on the generation of displacement uniformity across the output surface of the transducer. This has the aim of maximizing device reliability and minimizing nonlinear responses that could adversely affect the performance of devices incorporating endeffectors. The devices investigated in this study, designed using finite element analysis, have been experimentally characterized to identify their impedance and resonant characteristics.

Design of Piezoelectric Acoustic Transducers for Underwater Applications

“…Most class IV transducer designs focus on increasing the displacement of the end cap. However, attempts have been made to generate a uniform displacement rather than general displacement [ 44 ]. Additionally, to overcome the disadvantages of class IV transducers, other modes and resonance modes have been generated.…”

“… Distribution by transducer type: ( a ) transmitting characteristics by year, ( b ) receiving characteristics by year, ( c ) transmitting response by size, ( d ) receiving response by size, ( e ) transmitting by array, ( f ) receiving by array, ( g ) transmitting response affected by piezoelectric material composition, and ( h ) receiving response affected by piezoelectric material composition [ 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 …”