Computer Assisted Exposure In Scanned Film Radiography

D. B. Plewes

doi:10.1117/12.934498

1 November 1982 Computer Assisted Exposure In Scanned Film Radiography

D. B. Plewes

Proceedings Volume 0372, Physics and Engineering in Medical Imaging; (1982) https://doi.org/10.1117/12.934498
Event: International Workshop on Physics and Engineering in Medical Imaging, 1982, Pacific Grove, United States

Abstract

A scanning beam system with feedback equalization is described. This offers the reduction in scattered radiation with a pair of moving slits and the regional manipulation of incident x-ray exposure to compress large variations in trans-mitted film exposure to fit within the useful exposure range of radiographic film. When applied to chest radiography, this allows maximum soft tissue contrast in the retrodiaphragmatic, retro-cardiac, mediastinal and lung field regions. The scan time to expose a 14" x 17" chest film is 5 seconds with either a one-dimensional slit scan or a two-dimensional raster scan. By manipulation of the feedback scheme, considerable variation in low frequency contrast can be obtained.

Citation Download Citation

D. B. Plewes "Computer Assisted Exposure In Scanned Film Radiography", Proc. SPIE 0372, Physics and Engineering in Medical Imaging, (1 November 1982); https://doi.org/10.1117/12.934498

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