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目的探讨鼻咽癌患者放射治疗中应用面罩固定技术制作二维适形挡块治疗方法的临床应用价值。方法随机抽取300例接受放射治疗同时需要制作二维适形挡块进行保护正常组织的鼻咽癌患者,其中实验组使用面罩固定体位技术的158例,对照组使用非面罩固定体位技术的142例,在放射治疗摆位照射前、后用游标卡尺测量照射野中心的移动情况进行比较。结果使用面罩固定体位技术制作二维适形挡块组的患者照射野中心偏移范围为(1.07±0.41)mm,非面罩固定技术制作二维适形挡块组的患者偏移范围为(2.98±0.57)mm,两组比较差异有统计学意义(P<0.01)。结论使用面罩固定体位技术制作二维适形挡块偏移范围明显小于非面罩固定组。
Objective To investigate the clinical value of two-dimensional conformal block therapy in nasopharyngeal carcinoma patients treated with mask fixation. Methods A total of 300 patients with nasopharyngeal carcinoma undergoing radiotherapy and two-dimensional conformal occlusion for protecting normal tissues were enrolled. Among them, 158 patients in the experimental group were treated with mask fixation and 142 in the control group with non-mask fixation , In the radiation therapy position before and after irradiation, with a vernier caliper measurement of the movement of the center of the field for comparison. Results The range of deviation of center of irradiation field was (1.07 ± 0.41) mm for two-dimensional conformable stopper group and two-dimensional conformable stopper group for non-mask fixation technique was (2.98 ± 0.57) mm, the difference between the two groups was statistically significant (P <0.01). Conclusion The two-dimensional conformable stopper with mask fixed position technology has a much smaller deflection range than the non-mask fixed group.