Ultrasonic medical imaging apparatus having a polyvinylidene flu

Details Ultrasonic medical imaging apparatus having a polyvinylidene flu Ultrasonic medical imaging apparatus having a polyvinylidene flu

1987-10-15

1990-01-16

Jaworski, Francis

Surgery

Truss

Pad

A61B 800

Patent

active

048936294

ABSTRACT:
An ultrasonic medical imaging apparatus provides an ultransonic transducer constructed with polyvinylidene fluoride. Circuitry is included for generating an energizing pulse for the transducer, the pulse having a predetermined period and an instantaneous frequency which is varied from a first frequency to a second frequency during the period. Circuitry is provided for digitizing electrical signals from the transducer which electrical signals represent ultrasonic reflections received by the transducer in response to the energizing pulse, and a signal processor cross-correlates the digitized electrical signals with the energizing pulse.

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patent: 4519396 (1985-05-01), Epstein et al.
patent: 4583545 (1986-04-01), Towe

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