PMID: 753799Sep 1, 1978Paper

Physical characteristics of modern radiographic screen-film systems

Investigative Radiology
G U RaoA E James

Abstract

The most important characteristics that determine the performance of a screen-film system are system sensitivity (speed), slope or the average gradient of the characteristic curve, latitude of the film, system resolution (MTF) and system noise. In addition to these, one has to consider secondary characteristics such as the base plus fog level, the base tint, safelight sensitivity, reciprocity law failure and film granularity while evaluating performance. A comprehensive study of many of these characteristics has been made for a number of film-screen systems on the market. The data has been tabulated in the form of what are called "characteristic tables of radiographic film-screen systems." In these tables, characteristics such as average gradient, base plus fog level, etc. which depend on film alone, appear along the horizontal axis and MTF values which essentially depend on screens only appear along the vertical axis. The body of the table contains the absolute speeds in units of mR-1 at 80 KVP (heavy filtration) and a quantum mottle index of the various film-screen combinations tested, since these depend both on the film as well as on the screens.

Citations

Dec 1, 1982·The British Journal of Radiology·H ManninenM Wiljasalo
Jun 11, 1999·IEEE Transactions on Medical Imaging·T WangC C Li
Oct 1, 1984·Oral Surgery, Oral Medicine, and Oral Pathology·B M GrattA R Petersson
Nov 1, 1982·Oral Surgery, Oral Medicine, and Oral Pathology·R G StephensJ A Reid
Dec 1, 1989·Oral Surgery, Oral Medicine, and Oral Pathology·L J SkoczylasR G Waggener
Nov 1, 1986·The Journal of the American Dental Association·L T KircosL Lorton
Jan 1, 1986·Dento Maxillo Facial Radiology·L T KircosL Lorton
Jan 1, 1984·Physics in Medicine and Biology·R G Putney, D M Raymond

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