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Design of a miniature in-vivo shock wave hydrophone
Conference proceeding

Design of a miniature in-vivo shock wave hydrophone

M.E Schafer, T.L Kraynak and P.A Lewin
IEEE Symposium on Ultrasonics, v 3, pp 1623-1626
1990

Abstract

Acoustic sensors Bandwidth Biopsy Catheters Lithotripsy Needles Prototypes Safety devices Shock waves Sonar equipment
The authors discuss the development of a miniature precision acoustic sensor (hydrophone) which would survive in an in-vivo shock-wave field. The immediate application of the device is in improving the safety and efficacy of extracorporeal shock-wave lithotripsy (ESWL) treatment of kidney and gallbladder stones. The hydrophone is designed for insertion into the body using a catheter or biopsy needle, to provide reliable in-vivo acoustic pressure measurements of the ESWL. The research efforts include, (1) theoretical modeling to examine design trade-offs associated with material choice and sensor configuration; (2) prototype construction; and (3) acoustical performance characterization. The results of prototype testing are shown and compared to existing hydrophone designs. Performance differences involve bandwidth, directivity, and survivability under shock-wave exposure. The fundamental difficulty is improving survivability without sacrificing bandwidth or signal fidelity.< >

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Web of Science research areas
Engineering, Electrical & Electronic
Microscopy
Physics, Applied
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