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Use of an acoustic transponder for US visualization of biopsy needles
F Winsberg1, H A Mitty, R S Shapiro
1Department of Radiology, Mount Sinai Medical Center, City University of New York, NY 10029-6574.
Radiology
|September 1, 1991
Abstract:
A 20-gauge Chiba needle with a stylet embedded with polyvinyldifluoride (PVDF), a polymer that acts as an acoustic-electric transducer, facilitated a variety of diagnostic and therapeutic ultrasound (US)-guided interventions in nine patients. PVDF receives acoustic energy from the US scanner and transmits an electrical signal through the stylet and a shielded cable to the scanner, which results in appearance of a bright echo on the monitor at the location of the needle tip.