Premium
Theoretical considerations of effects of x‐ray film–screen characteristics on threshold detectability of small low‐contrast objects
Author(s) -
Lassen Margit,
Bloch Peter
Publication year - 1978
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594408
Subject(s) - contrast (vision) , optics , radiation , materials science , nuclear medicine , physics , medicine
An expression is derived for visual contrast of a radiographed small object that takes into account the proportion of scattered radiation as well as the shape of the sensitometric curve of the film–screen combination. Based on this expression for visual contrast applied to two different film–screen systems, predictions are made for threshold perceptability of low‐contrast objects radiographed with the two imaging systems in the presence of scattered radiation and at different points on the sensitometric curves.