DIGITAL CHEST RADIOGRAPHY - COMPARING 2 TYPES OF CRT MONITORS IN A ROC EXPERIMENT WITH A CHEST PHANTOM

Two principally different 1000-line CRT (cathode ray tube) monitors co nnected to a digital image intensifier system for chest radiography we re compared in terms of image quality and viewing comfort. Image quali ty was assessed by means of ROC analysis. Five observers tried to find simulated pathology positioned over the lungs and the mediastinum of an anthropomorphic phantom. The observers also graded the viewing comf ort of the two CRTs in terms of flicker, light levels, and general com fort. No significant difference in the detection of simulated patholog y was demonstrated between the two monitors. A slight preference for t he newer CRT (Imlogix) was seen as compared to the older standard CRT (Siemens) regarding flicker and general comfort.