Podgorsak E B, Evans M D
Department of Radiation Oncology, Sir Mortimer B. Davis Jewish General Hospital, Montréal, Québec, Canada.
Int J Radiat Oncol Biol Phys. 1987 Dec;13(12):1937-41. doi: 10.1016/0360-3016(87)90363-4.
An alternative to standard short target-skin distance (TSD) rectal irradiation techniques is presented. The proctoscopic rectal cone is linked outside of the patient to a superficial X ray tube operated at 50 kVp and 25 mA. The cone is rigidly held in place by a hydraulic clamp and linked to the X ray tube with an electromagnetic lock. The X ray beam is filtered by 0.3 mm of aluminum, giving a half-value-layer of 0.27 mm of aluminum and an exposure rate of 720 R/min. (0.186 C/kg-min.) at the treatment TSD of 22 cm. The physical aspects of the technique are described in detail.
本文介绍了一种标准短靶皮距（TSD）直肠照射技术的替代方法。直肠镜直肠锥形准直器在患者体外与一台运行于50 kVp和25 mA的浅表X射线管相连。锥形准直器通过液压夹具牢固固定在适当位置，并通过电磁锁与X射线管相连。X射线束由0.3毫米铝过滤，在22厘米的治疗靶皮距下，铝的半价层为0.27毫米，照射率为720 R/min（0.186 C/kg - min）。详细描述了该技术的物理特性。
