Title :
Intracardiac ultrasound catheter using a micromachine (MEMS) actuator
Author :
Zara, J.M. ; Bobbio, S. ; Goodwin-Johansson, S. ; Smith, S.W.
Author_Institution :
Dept. of Biomed. Eng., Duke Univ., Durham, NC, USA
Abstract :
Catheter based intracardiac ultrasound offers the potential for improved guidance of interventional cardiac procedures. The objective of this work is the development of catheter based, forward-looking mechanical sector scanners incorporating high frequency ultrasound transducers operating at frequencies up to 20 MHz. The current transducer assembly consists of a single 20 MHz PZT piston mounted on a polyimide table that pivots on gold plated polyimide hinges. This table-mounted transducer is tilted using a linear MEMS actuator to produce a sector scan. The prototype transducer/actuator assembly was fabricated and interfaced with a personal computer to create a single channel ultrasound scanner. This paper discusses the development of and results obtained by this real time scanning system
Keywords :
biomedical transducers; biomedical ultrasonics; cardiology; microactuators; ultrasonic transducers; 20 MHz; high frequency ultrasound transducers; interventional cardiac procedures; intracardiac ultrasound catheter; medical diagnostic imaging; micromachine actuator; personal computer; polyimide table; real time scanning system; sector scan; single 20 MHz PZT piston; table-mounted transducer; transducer assembly; Assembly; Catheters; Fasteners; Frequency; Gold; Micromechanical devices; Pistons; Polyimides; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE
Conference_Location :
Caesars Tahoe, NV
Print_ISBN :
0-7803-5722-1
DOI :
10.1109/ULTSYM.1999.849206
