Sensitometric responses of selected medical radiographic films

Autor:	J E Gray, James M. Kofler
Rok vydání:	1991
Předmět:	business.industry Sensitometry X-Ray Film Radiographic Films media_common.quotation_subject Film density Optics Spectral sensitivity Medicine Contrast (vision) Radiology Nuclear Medicine and imaging business Technology Radiologic media_common
Zdroj:	Radiology. 181:879-883
ISSN:	1527-1315 0033-8419
Popis:	Radiographic films produce different densities and contrast when processor changes occur, and the magnitude and rate of change vary with film type. The ability to detect and interpret the clinical importance of film density changes may depend on the method of sensitometry used. The characteristics of several medical radiographic films and various sensitometers were examined under three sensitometric variations and five processing variations. Of all variations used, only exposure with a single-versus a double-sided sensitometer caused a film type to have a marked different response. The results indicate that mismatching the sensitometer spectral output with the spectral sensitivity of the film in most cases does not affect the density changes of the film. The fact that a few films may be sensitive to differences in spectral content of the exposing light and dual- versus single-sided exposure and that only a limited number of film types were tested, however, leads to the prudent conclusion that the exposure conditions for quality control purposes should match clinical exposure conditions as closely as possible.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58da5f42fd1142a87879420e10c4f78b https://doi.org/10.1148/radiology.181.3.1947114 Zobrazit plný text záznamu