Extended focus transducer system

Surgery – Truss – Pad

Patent

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Details

73626, A61B 1000

Patent

active

043985394

ABSTRACT:
An ultrasound multi-electrode transducer together with electrical control means in which a central circular section and at least one annular peripheral section are successively electrically connected during transmit and receive functions so as to provide an increased focal zone.

REFERENCES:
patent: 4012952 (1977-03-01), Dory
patent: 4137777 (1979-02-01), Hoverl et al.
patent: 4155259 (1979-05-01), Engeler
patent: 4161121 (1979-07-01), Zitelli et al.
patent: 4168628 (1979-09-01), Vilkomeison
patent: 4241610 (1980-12-01), Anderson
patent: 4241611 (1980-12-01), Specht et al.
patent: 4276491 (1981-06-01), Daniel
patent: 4276779 (1981-07-01), Davis, Jr.
Ueda, M. et al., "Dynamic Focusing UTS Transducers Using Analog-Switch Phase Shifters", Electronics & Comm. in Japan, vol. 58, #12, 1975, p. 1.

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