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Proceedings Paper

Rare-Earth Intensifying Screen Studies At The Bureau Of Radiological Health
Author(s): Robert F. Wagner; Roger H. Schneider
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Paper Abstract

Early in 1972 the Bureau of Radiological Health undertook a program in its Division of Electronic Products to assess the exposure and imaging characteristics of rare-earth intensifying screens. Several internal reports together with publications in the open literature summarize the principal finding of this program to date, namely, that a new technology has emerged which allows medical radiography to be carried out with exposure reductions between roughly 1.6 and 2.5 when the rare-earth systems are compared to calcium tungstate systems with comparable image quality. This exposure reduction is due to the increased quantum efficiency, or stopping power of these screens. We believe that the mixed reviews which the rare-earth systems have received are due to a misapplication of the additional brightness of the rare-earth phosphors which is inappropriate to the particular radiographic task.

Paper Details

Date Published: 25 March 1976
PDF: 1 pages
Proc. SPIE 0070, Application of Optical Instrumentation in Medicine IV, (25 March 1976); doi: 10.1117/12.954595
Show Author Affiliations
Robert F. Wagner, Medical Physics Branch (United States)
Roger H. Schneider, Bureau of Radiological Health (United States)


Published in SPIE Proceedings Vol. 0070:
Application of Optical Instrumentation in Medicine IV
Joel E. Gray; William R. Hendee, Editor(s)

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