Electromagnetic acoustic pressure pulse source

Details Electromagnetic acoustic pressure pulse source Electromagnetic acoustic pressure pulse source

1992-07-06

1993-07-27

Apley, Richard J.

Surgery

Truss

Perineal

12866003, A61B 1722

Patent

active

052303284

ABSTRACT:
An electromagnetic acoustic pressure pulse source has a membrane with at least one electrically conductive region, the membrane being disposed for interacting on one side with an acoustic propagation medium, and having an opposite side facing a flat, spiral coil arrangement. The coil arrangement is driven with high-voltage pulses which cause the membrane to be rapidly repelled from the coil arrangement, thereby generating a pressure pulse in the acoustic propagation medium. The potential difference between the turns of the coil arrangement and the electrically conductive region of the membrane varies across the membrane, and the membrane is provided with a depression on the side thereof facing the coil arrangement in a region of high potential difference between the turns of the coil and the electrically conductive region of the membrane.

REFERENCES:
patent: 4697588 (1987-10-01), Reichenberger
patent: 4782821 (1988-11-01), Reitter
patent: 4807627 (1989-02-01), Eisenmenger
patent: 4901709 (1990-02-01), Rattner
patent: 4924858 (1990-05-01), Katona

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