论文部分内容阅读
目的 分析体部恶性肿瘤在放射治疗中 ,真空袋体位固定技术的临床应用价值及存在的问题。方法 随机抽取实施体部放疗患者 714例 (野 ) ,其中使用真空袋固定体位的 5 82例 (野 ) ,使用非真空袋固定体位 (指用沙袋、胶带等简易固定体位 ,网膜固定体位除外 )的 132例 (野 ) ,在放疗摆位投照实施前、后用直尺测量灯光野与照射野各点的移动情况进行比较。另抽取 5 6例 (野 )使用二次抽真空的复形真空袋固定体位的患者 ,同样用上述方法进行比较。结果 用真空袋体位固定者灯光野与照射野的偏差率为 6 .7% ,而用非真空袋体位固定者的为 2 6 .5 % ,用复形真空袋体位固定者的为32 .1%。结论 真空袋固定体位技术的偏差率明显少于用非真空袋体位固定和二次抽真空复形袋固定的患者 ,对于半软状态的真空袋须重新制作及到模拟定位机下透视复位方可供临床使用。
Objective To analyze the clinical value and existing problems of vacuum bag position fixation in radiotherapy of malignant tumors of the body. Methods A total of 714 patients undergoing radiotherapy in the body were randomly selected, of whom 5 82 cases (field) were fixed using a vacuum bag and were fixed with a non-vacuum bag (refer to simple fixed position with punching bag, adhesive tape, etc.) ) 132 cases (wild), radiotherapy placement in the implementation of before and after the use of ruler to measure the light field and the radiation field movement at various points were compared. In addition, 56 patients (wild) with vacuum evacuated vacuum bag were also used to compare the above methods. Results The deviation of the lamp field and the radiation field of the vacuum bag holder was 6.7%, compared with 26.5% for the non-vacuum bag holder and 32.1 for the fixed bag holder %. Conclusion The deviation rate of vacuum bag fixed position technique is obviously less than that of patients fixed with non-vacuum bag position and double vacuum bag. For the vacuum bag with semi-soft state, For clinical use.