Chest radiography provides ana of the graat challenges to digital diagnostic imaging becau$e of (1) the relatively larga size of the chest field, (2) the contrast range required to resolve subtle pathological changes in soft tissue density, and (3) the high degree of spatial resolution required to discriminate pathological detail. The field size problem was resalvad by using a 57-cm image intensifier whose video output of the chast could be digitizad. The issue of contrast resolution was addressed in a recently completed receiver-operating characteristic study of the detectability of Iow-contra$t densities in a humanoid chest phantom. The latter indicated that, despite the smaller size of the digital image, they were adequate lar resolving clinically significant soft-tissue densities. The question of spatial resolution in digital diagnostic images is addressed in the study presanted. A set of 41 clinical casas were selected to provide the typical range of diagnostir type axperienced in routine diagnostic radiology. The images were each presented as conventional film, digital lasar-printer, and digital video images. The results of an ROC analysis of five readers' performance in each of the viewing modas is presented. 9 1990 by W.B. Saunders Company,
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.