Screen film cassette

Details Screen film cassette Screen film cassette

1995-09-08

1996-11-12

Wong, Don

X-ray or gamma ray systems or devices

Photographic detector support

Sheet film cassette

378186, 378182, 2504871, G03B 4202

Patent

active

055747680

ABSTRACT:
A screen film cassette for radiographic use. The cassette includes front and rear screen-film combinations housed in container, and each screen-film combination includes a pair of intensifying screens which sandwich a film. A dividing filter is located between the two screen-film combinations to improve X-ray beam intensity incident on the back screen-film combination. The filter also reduces the transfer of visible light energy or K-characteristic photon energy, generated in one screen-film combination during the imaging process, to the adjacent screen-film combination. The invention provides for improved radiographic film contrast and image resolution.

REFERENCES:
patent: 2247451 (1941-07-01), Rawls
patent: 4983021 (1990-01-01), Bollen et al.
patent: 5070248 (1991-12-01), Pesce
patent: 5461660 (1995-10-01), Dooms et al.
McLean, I. D. et al., "Twin Screen-Film Chest Radiography: Cost-effective Lung and Mediastinal Imaging," Radiology, vol. 190, No. 2, pp. 621-622, (Australia, Feb. 1994).

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