Noise Measurements On Rare-Earth Intensifying Screen Systems

Robert F. Wagner; Kenneth E. Weaver

doi:10.1117/12.954290

1 May 1974 Noise Measurements On Rare-Earth Intensifying Screen Systems

Robert F. Wagner, Kenneth E. Weaver

Proceedings Volume 0056, Medical X-Ray Photo-Optical Systems Evaluation; (1974) https://doi.org/10.1117/12.954290
Event: Medical X-Ray Photo-Optical Systems Evaluation, 1974, Columbia, United States

Abstract

Many popular examples exist for demonstrating how the statistics begin to show (and picture quality deteriorates) when atempts are made to form images with smaller and smaller numbers of photons (Ref. 1, 2). That this state of affairs reigns even in general purpose screen-film radiography has been shown over a dozen years ago by Cleare et al. (Ref. 3) and by Rossmann (Ref. 4, 5). The expression "quantum mottle" was invented to describe the blotchiness or clustering of film grains through which this effect is manifested. Quantum mottle, together with two additional but lower level sources of noise, namely screen structure mottle and film graininess, have been quantitatively analyzed in a series of experiments by Doi (Ref. 6). A few more examples of quantification of such radiographic screen-film noise can be cited (Ref. 7-10), but the samples studied are few and generally unidentified.

Citation Download Citation

Robert F. Wagner and Kenneth E. Weaver "Noise Measurements On Rare-Earth Intensifying Screen Systems", Proc. SPIE 0056, Medical X-Ray Photo-Optical Systems Evaluation, (1 May 1974); https://doi.org/10.1117/12.954290

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