Film cassette having marker for identifying the exposure side of

Details Film cassette having marker for identifying the exposure side of Film cassette having marker for identifying the exposure side of

1991-11-04

1993-02-23

Howell, Janice A.

X-ray or gamma ray systems or devices

Auxiliary data acquisition or recording

378165, 378166, 378181, 378182, H05G 128

Patent

active

051896893

ABSTRACT:
The present invention provides an X ray film cassette with a permanent marking means for identifying the side of the radiographic film that faced the X ray tube during exposure. Such identification is achieved irrespective of whether the film is exposed through the cover or base of the cassette and does not require any separate action by the X ray technologist, eliminating the element of human error. In a preferred embodiment, the working means is comprised of chirally asymmetric X ray opaque and/or light-opaque letters or markings permanently mounted in the film cassette. A user friendly apparatus is described, for installing the light-opaque markers on the intensifying screens of the X ray film cassette.

REFERENCES:
patent: 5077778 (1991-12-01), Fabian
patent: 5086445 (1992-02-01), Fisher et al.

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