Title :
Development of small aperture polymer transducers for high frequency imaging
Author :
Lockwood, G.R. ; Hazzard, C.R.
Author_Institution :
Dept. of Bioeng., Cleveland Clinic Found., OH, USA
Abstract :
Poor receiver sensitivity has hampered the development of small aperture (⩽2 mm diameter) polymer transducers for high frequency (30-80 MHz) medical imaging. The authors have developed a miniature spherically shaped polymer transducer incorporating an integrated circuit pre-amplifier. The pre-amplifier reduces the problem of poor receiver sensitivity by providing a high input impedance buffer. Using this approach, the amplitude of the pulse-echo response for a 1 mm diameter transducer is increased ten times compared with an identical transducer using an external 50 Ω pre-amplifier
Keywords :
biomedical electronics; biomedical transducers; biomedical ultrasonics; polymers; preamplifiers; ultrasonic transducers; 1 mm; 2 mm; 30 to 80 MHz; 50 ohm; high frequency imaging; high input impedance buffer; integrated circuit preamplifier; medical diagnostic imaging; medical instrumentation; miniature spherically shaped polymer transducer; poor receiver sensitivity; small aperture polymer transducers; Apertures; Biomedical imaging; Biomedical transducers; Frequency; Impedance; Integrated circuit modeling; Polymers; Transfer functions; Ultrasonic transducers; Voltage;
Conference_Titel :
Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-4153-8
DOI :
10.1109/ULTSYM.1997.663342
