A prospective study of supine versus prone positioning and whole-body thermoplastic mask fixation for craniospinal radiotherapy in adult patients
A prospective study of supine versus prone positioning and whole-body thermoplastic mask fixation for craniospinal radiotherapy in adult patients
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DOI：
10.1016/j.radonc.2011.07.003
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发表时间：
2012-02-01
影响因子：
5.7
通讯作者：
Thurzo, Laszlo
中科院分区：
文献类型：
--
作者：
Hideghety, Katalin;Cserhati, Adrienn;Thurzo, Laszlo
目的：从剂量分布、患者舒适度和设置准确性等方面评价头体热塑性口罩固定在成人仰卧位下照射神经轴的效果。方法与材料：12例成人患者中有9例采用俯卧位和仰卧位进行颅脊髓轴照射。在两种体位的口罩固定和ct计划后，完成一份关于舒适度的问卷。比较了仰卧位和俯卧位三维适形平面图对靶区和危及器官的剂量。评估所有12例患者仰卧位照射时的门静脉图像，使用van Herk公式计算系统误差和随机误差。结果：俯卧位与仰卧位的靶覆盖率、剂量均匀性及对危及器官的剂量均无显著差异。患者认为仰卧位更舒适（2.8比4.29分），向量随机误差为3.27 mm，系统误差为0.32 mm。侧卧位随机设置误差最大，为4.83 mm。结论：成人患者推荐采用更舒适的仰卧位进行颅脊髓照射。全身热塑性口罩固定提供了极好的重新定位精度。2011爱思唯尔爱尔兰有限公司版权所有。放射治疗与肿瘤杂志（2012）：214-218
Purpose: To evaluate neuroaxis irradiation for adults in the supine position using head body thermoplastic mask fixation, from the aspects of dose distribution, patient comfort and set-up accuracy.Methods and materials: Nine of the 12 adult patients were positioned for craniospinal axis irradiation in both prone and supine positions. After mask fixation and planning CTs in both positions, a questionnaire relating to the comfort was completed. The doses to the target and to the organs at risk of the 3D conformal plans in the supine and prone positions were compared. Portal images of all 12 patients irradiated in the supine position were evaluated, the van Herk formulas being used to calculate the systemic and random errors.Results: No significant difference was found between the prone and supine positions target coverage, the dose homogeneity and the dose to the organs at risk. The supine position was considered more comfortable by the patients (scores of 2.8 versus 4.29), with a vector random error of 3.27 mm, and a systematic error of 0.32 mm. The largest random set-up error was observed in the lateral direction: 4.83 mm.Conclusions: The more comfortable supine position is recommended for craniospinal irradiation in adult patients. Whole-body thermoplastic mask immobilization provides excellent repositioning accuracy. (C) 2011 Elsevier Ireland Ltd. All rights reserved. Radiotherapy and Oncology 102 (2012) 214-218