Geijer H, Beckman K W, Andersson T, Persliden J
Department of Radiology, Orebro Medical Centre Hospital, 701 85 Orebro, Sweden.
Eur Radiol. 2001;11(9):1704-9. doi: 10.1007/s003300100851.
The aim of this study was to investigate the image quality for a flat-panel amorphous silicon detector at various radiation dose settings and to compare the results with storage phosphor plates and a screen-film system. A CDRAD 2.0 contrast-detail phantom was imaged with a flat-panel detector (Philips Medical Systems, Eindhoven, The Netherlands) at three different dose levels with settings for intravenous urography. The same phantom was imaged with storage phosphor plates at a simulated system speed of 200 and a screen-film system with a system speed of 160. Entrance surface doses were recorded for all images. At each setting, three images were read by four independent observers. The flat-panel detector had equal image quality at less than half the radiation dose compared with storage phosphor plates. The difference was even larger when compared with film with the flat-panel detector having equal image quality at approximately one-fifth the dose. The flat-panel detector has a very favourable combination of image quality vs radiation dose compared with storage phosphor plates and screen film.
本研究的目的是调查平板非晶硅探测器在不同辐射剂量设置下的图像质量，并将结果与存储磷光板和屏-片系统进行比较。使用平板探测器（飞利浦医疗系统公司，荷兰埃因霍温）对CDRAD 2.0对比细节模体进行成像，设置为静脉肾盂造影的三种不同剂量水平。使用存储磷光板以模拟系统速度200对同一模体进行成像，使用屏-片系统以系统速度160进行成像。记录所有图像的入射表面剂量。在每个设置下，由四名独立观察者读取三张图像。与存储磷光板相比，平板探测器在辐射剂量不到一半时具有相同的图像质量。与胶片相比差异更大，平板探测器在大约五分之一的剂量下具有相同的图像质量。与存储磷光板和屏-片相比，平板探测器在图像质量与辐射剂量方面具有非常有利的组合。
