Kuhn H
Rontgenblatter. 1985 Jul;38(7):224-30.
Four methods of reducing the patient dose are reviewed. Without doubt, the patient dose can be considerably reduced by relatively simple means: With rare-earth screens by a factor of 2-4 compared with a CaWO4 universal screen (1 mR) and in some cases by a factor of 1.5-2 with prefiltration. A more complicated and expensive method is the 100 mm spotfilm technique. This permits a dose rate reduction by a factor of 10 compared with a CaWO4 universal screen or by a factor of 5 compared with a universal system with rare-earth screens. In the wide-ranging field of digital radiography, the possibilities of dose reductions by means of digital processing of conventional film screen exposures are investigated.
本文回顾了四种降低患者剂量的方法。毫无疑问，通过相对简单的方法可以大幅降低患者剂量：使用稀土增感屏时，与钨酸钙通用增感屏（1毫伦琴）相比，剂量可降低2至4倍，在某些情况下，通过预过滤剂量可降低1.5至2倍。一种更复杂且昂贵的方法是100毫米点片技术。与钨酸钙通用增感屏相比，这种技术可使剂量率降低10倍，与配备稀土增感屏的通用系统相比，可降低5倍。在广泛的数字射线摄影领域，人们研究了通过对传统胶片-增感屏曝光进行数字处理来降低剂量的可能性。
