Sibata C H, Mota H C, Higgins P D, Gaisser D, Saxton J P, Shin K H
Cleveland Clinic Foundation, OH 44195.
Int J Radiat Oncol Biol Phys. 1990 Feb;18(2):455-61. doi: 10.1016/0360-3016(90)90115-z.
Radiotherapy treatment of patients having a hip prosthesis is a common problem facing dosimetrists and physicists when the treatment plan requires irradiation of the pelvic area. To quantify the perturbation of these devices, attenuation studies were done with 6 and 18 MV photon beams using various hip prostheses models with varying size and composition. These studies have shown that an attenuation of as much as 50% can be found in a single beam profile under the prosthesis. We have studied the capability of a dose planning system to predict the transmission of these devices as compared with measurements.
当治疗计划需要对骨盆区域进行照射时，对佩戴髋关节假体的患者进行放射治疗是剂量师和物理学家面临的一个常见问题。为了量化这些装置的扰动，使用各种尺寸和成分不同的髋关节假体模型，对6和18 MV光子束进行了衰减研究。这些研究表明，在假体下方的单个射束剖面中，衰减可达50%。我们研究了剂量规划系统与测量结果相比预测这些装置透射率的能力。
