Anterior-posterior treatment localization in pelvic radiotherapy: tattoos or fixed couch-to-isocentre distance.
Anterior-posterior treatment localization in pelvic radiotherapy: tattoos or fixed couch-to-isocentre distance.
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DOI：
10.1016/s0958-3947(96)00156-2
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发表时间：
1997-01-01
期刊：
影响因子：
--
通讯作者：
Mortensen, T M
中科院分区：
文献类型：
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作者：
Greer, P B;Mortensen, T M
骨盆放射治疗中前后等心位置的确定方法是通过将侧位激光对准皮肤上的纹身标记，或通过设置每日恒定的沙发至等心距离。在使用前一种方法时，记录每天的躺椅垂直运动，并结合使用电子门静脉成像装置测量患者每天的前后运动，以确定躺椅垂直运动是否会导致前后设置变化。研究了7例不固定的患者，4例仰卧位前列腺和3例俯卧位直肠。这两种运动被发现是高度相关的（相关系数= 0.82），支持恒定的沙发到等心距离方法。当日常沙发垂直运动从前后运动结果中减去时，7名患者中有6名的设置变化减少了。
The methods of determining the anterior-posterior isocentre location in pelvic radiotherapy are either by aligning lateral localization lasers to tattoo marks on skin, or by setting a constant daily couch-to-isocentre distance. While using the former method the day-to-day vertical couch movement was recorded and combined with measurements of day-to-day anterior-posterior patient movement made with an electronic portal imaging device to determine whether couch vertical movement contributes to anterior-posterior setup variation. Seven unimmobilized patients were studied, four supine prostate and three prone rectum patients. The two motions were found to be highly correlated (correlation coefficient = 0.82) which supports the constant couch-to-isocentre distance approach. When the day-to-day couch vertical movement was subtracted from the anterior-posterior movement results the setup variation was reduced in six of the seven patients.