Marked X ray film with modified cassette for identifying the exp

Details Marked X ray film with modified cassette for identifying the exp Marked X ray film with modified cassette for identifying the exp

1990-08-27

1992-06-16

Westin, Edward P.

X-ray or gamma ray systems or devices

Photographic detector support

Sheet film cassette

378165, 378166, 378162, G03B 4204

Patent

active

051230402

ABSTRACT:
A radiographic film cassette exposes a sheet of film to X-rays projected along an X-ray path by an X-ray tube. The cassette has an inner surface defining a recess for receiving the film sheet. A base having an inner surface is adapted to close upon the cover for securing the film sheet. A key is permanently mounted to the cover and disposed within the recess to provide the recess with chiral asymmetry. The sheet of film has a cutout adapted to engage the key. A marker is permanently fixed along at least one edge of the film. The key is so mounted that its disposition within the recess permits engagement with the cutout in only one orientation of the film sheet therein. The marker has chiral asymmetry and cooperates with the key and the cutout to identify the side of the film sheet facing the X-ray tube during exposure.

REFERENCES:
patent: 2103961, Wilmanns
patent: 3846635, Shaffer
patent: 4331236, Bauer
patent: 4739480, Oono et al.
patent: 4764948, Hurwitz
patent: 4860330, Strommer et al.
patent: 4953193, Robinson

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