Indicator for ultrasound transducer

Details Indicator for ultrasound transducer Indicator for ultrasound transducer

1988-09-30

1992-08-18

Jaworski, Francis

Surgery

Truss

Perineal

G01N 2900

Patent

active

051390132

ABSTRACT:
A direct indicator which serves to verify before each use that the transducer used in ultrasound therapy is actually operational and is transmitting ultrasound radiation to the patient. The indicator includes a liquid crystal layer which changes color in the presence of ultrasound radiation when an active ultrasound transducer is held against the surface of the indicator. A transparent vinyl layer is positioned on top of the liquid crystal layer, the vinyl layer not only serving to protect the liquid crystal layer from surface heat, but also enabling the liquid crystal to store the color pattern produced by the transducer for a predetermined time duration, for example, while the transducer is in use, to remind the operator that the transducer has been verified.

REFERENCES:
patent: 4323077 (1982-04-01), Smith
patent: 4327743 (1982-05-01), Katz
patent: 4333477 (1982-06-01), Chervitz
patent: 4390026 (1983-06-01), Christman
patent: 4433637 (1984-02-01), Buirley et al.
patent: 4437471 (1984-03-01), Nelson

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