放射治疗真空袋体位固定两种不同标记法的效果比较

Comparison of Two Different Labeling Methods during Fixing Posture with Vacuum Bags in Radiation Therapy

目的探讨真空袋体位固定两种不同标记法运用在胸腹部肿瘤放射治疗的临床应用价值。方法将40例采用真空袋实施胸腹部放射治疗患者随机分成两组,实验组在模拟定位机下定位于真空袋上标志激光定位标志点同时在病人皮肤上标志定位参考点,对照组没有在皮肤上标志定位参考点。通过拍摄定位片与放射治疗前、后射野验证片上的相关点的偏移情况与对照组测量比较,探讨采用真空袋体位固定两种不同标记法完成放射治疗过程的摆位误差及临床应用价值。结果增加病人皮肤标志定位参考点组与对照组的阳性率分别是91.3%和75%,两组数据差异有统计学意义(P<0.01)。结论增加病人皮肤标志定位参考点有利于摆位重复性的提高,可减少摆位误差。

Objective To discuss the clinical value of two different labeling methods during fixing posture with vacuum bags in radiation therapy of tumors in abdomen and chest.Methods Randomly divide 40 patients treated with radiation therapy in abdomen and chest by adopting vacuum bags into two groups.In the experimental group,label laser positioning mark points under simulation positioner and mark positioning reference points in patients＇ skin at the same time.In the control group,there were not marking positioning reference points in patients＇ skin.By taking simulation positioning photos and comparing the drift condition of related points on portal imaging verification photos before and after radiation therapy with the control group,discuss the posture error and clinical application value of adopting two different labeling methods during fixing posture with vacuum bags to complete radiation therapy.Results The positive rate of the group of increasing the marking positioning reference points in patients＇ skin was 91.3% and 75% in control group,respectively,there were significant differences between two sets of data（P 〈0.01）.Conclusion Increasing the marking positioning reference points in patients＇ skin is good for the improvement of positioning repeatability and decrease of posture g error.