Hillen W, Schiebel U, Zaengel T
Philips GmbH, Research Laboratory Aachen, West Germany.
Med Phys. 1987 Sep-Oct;14(5):744-51. doi: 10.1118/1.596127.
The imaging performance of a storage phosphor system (SPS) for digital projection radiography is studied in which the x-ray image is temporarily stored in a light-stimulable phosphor plate which is subsequently read out by a scanning laser beam. The imaging performance of this system has been analyzed for two types of imaging plates. The spatial resolution is described by the modulation transfer function and the signal-to-noise (S/N) ratios of the recorded image data are measured in terms of noise-equivalent quanta and detective quantum efficiency. Their dependence on detector entrance dose and spatial frequency is discussed. A detailed analysis of the different sources of image noise is given to outline the intrinsic features and limits of the system. Finally, the S/N behavior of the SPS is compared with published data of screen-film systems.
研究了用于数字投影放射成像的存储磷光体系统（SPS）的成像性能，其中X射线图像被临时存储在可光激发磷光板中，随后由扫描激光束读出。针对两种类型的成像板分析了该系统的成像性能。通过调制传递函数描述空间分辨率，并根据噪声等效量子和探测量子效率测量记录图像数据的信噪比。讨论了它们对探测器入口剂量和空间频率的依赖性。对图像噪声的不同来源进行了详细分析，以概述该系统的固有特性和局限性。最后，将SPS的信噪比特性与已发表的屏-片系统数据进行了比较。
