Comparison between Two Digital Imaging Detector System:Image Qulity and Radiation Dose

Objective To assess and compare the difference in image qulity and exposure dose between the flat panel digital radiography(DR) system and computed radiography(CR). Methods A contrast-detail phantom CDRAD2. 0 was exposed by DR and CR with different mAs sets. The en-trance surface doses were recorded for all images. Images was analyzed by assessing software of CDRAD2.0,The image quality figure inverse number(IQFinv) was measured for each image. Statistical analysis was performed using Spearman's correlation test and Wilcoxon signed-rank test to compare the difference in image quality and exposure dose between DR and CR.Results With different mAs value of tube current dosage,The IQFinv difference between DR and CR showed statistical significance (P0.05). Conclusion Image quality of FPD has been proved to be far superior to that of IP,in par-ticular for low contrast detail. The clinical application of DR will reduce the exposure dose to the patient greatly.