Ultrasonic nondiffracting transducer

Details Ultrasonic nondiffracting transducer Ultrasonic nondiffracting transducer

1990-01-29

1992-01-21

Jaworski, Francis

Surgery

Truss

Pad

310369, A61B 800

Patent

active

050819950

ABSTRACT:
An ultrasonic transducer for use in medical imaging systems includes a piezoelectric element having an active electrode formed as a series of concentric annular segments. Each segment is separately driven by a transmitter in which the amplitude and phase of the drive signals produce an ultrasonic wave having a pressure profile that approxinmates a zeroth order Bessel function. A nondiffracting beam of ultrasonic waves is produced.

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patent: 4677981 (1987-07-01), Coursant
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