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

1992-07-20

1994-04-26

Porta, David P.

X-ray or gamma ray systems or devices

Auxiliary data acquisition or recording

378165, 378166, H05G 128

Patent

active

053073975

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 does not require any action by the X ray technologist, eliminating the element of human error. The marking means is comprised of chirally asymmetric X ray opaque and/or light-opaque letters or markings permanently mounted in the film cassette to intersect overlapping portions of an X ray path projected during exposure.

REFERENCES:
patent: 4698836 (1987-10-01), Minasian
patent: 5070248 (1991-12-01), Pesce
patent: 5086445 (1992-02-01), Fisher et al.
patent: 5189689 (1993-02-01), Fabian

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