Peters V G, Herer A S
Int J Radiat Oncol Biol Phys. 1984 Jun;10(6):927-32. doi: 10.1016/0360-3016(84)90397-3.
A cobalt-60 teletherapy unit has been modified to permit total body irradiation (TBI) with a vertical beam in a conventional treatment room. This technique has been implemented at low cost using a few easily made accessories. Removal of the adjustable collimator assembly provides a field 2.3 meters in diameter at 150 cm SSD. A copper flattening filter has been constructed to improve beam uniformity and remove electron contamination. Machine set up time for TBI requires less than 15 minutes and does not affect the routine clinical use of the unit. A dose rate of 32 cGy per minute (midplane) is attainable in a 20 cm thick patient. The dosimetry and technical aspects are presented in this paper.
一台钴-60远距离治疗机已被改造，以便在常规治疗室中使用垂直光束进行全身照射（TBI）。这项技术通过使用一些易于制作的配件以低成本实现。拆除可调准直器组件后，在150 cm源皮距处可提供直径为2.3米的射野。已制作了一个铜均整滤过器以改善射束均匀性并去除电子污染。TBI的机器设置时间不到15分钟，且不影响该设备的常规临床使用。在20 cm厚的患者中，每分钟（中平面）可达到32 cGy的剂量率。本文介绍了剂量学和技术方面的内容。
