摘要
目的:探讨2种不同固定底板对头颈部肿瘤放疗摆位误差的影响。方法:将30例患者随机分为A、B 2组,每组15例,A组用civco头颈肩延伸板(Type-STM Extension)固定摆位;B组用civco头颈肩一体板(Type-S Overlay Board)固定摆位。2组均用热塑头膜固定。用Varian23IX图像引导直线加速器对患者每周行一次锥形束CT(cone beam CT,CBCT)图像引导(共6周)治疗,结合骨配准及人工校对获得患者左右、头脚、前后方向摆位误差。结果:A组摆位绝对误差在前后方向大于B组,分别为(2.31±1.35)、(1.88±1.79)mm,差异有统计学意义(P=0.032);A组摆位相对误差与B组相比较,差异无统计学意义(P均>0.05)。2组每周绝对摆位误差均相近,差异无统计学意义(P均>0.05)。结论:2种头颈肩固定板对头颈部肿瘤放疗的摆位误差无明显差异,可根据临床实际需要选择合适的固定底板。
Objective To compare the effects of two head holders on the setup errors during head and neck neoplasms radiotherapy.Methods Totally 30 patients were divided into groups A and B randomly and equally.Group A applied TypeSTM Extension for setup,and group B used Type-S Overlay Board,with thermoplastic film applied to fixation.Varian23IX image guided linear accelerator was involved in the therapy,and the patients underwent CBCT-guided therapy once a week in6 weeks.The setup errors at left-right,head-foot and anterior-posterior directions were obtained by bone registration and manual checking.Results The absolute setup error at anterior-posterior direction of group A,was（2.31±1.35）mm,which was significantly higher than（1.88±1.79）mm of group B（P=0.032）.There were no obvious differences between the setup errors of group A and those of group B（P〉0.05）,and the weekly absolute errors of group A were not statistically different from those of group B（P〉0.05）.Conclusion There are no significant differences between the effects of the two head holders on the setup errors during head and neck neoplasms radiotherapy,and proper head holder can be selected according to clinical requirements.
出处
《医疗卫生装备》
CAS
2017年第3期80-82,93,共4页
Chinese Medical Equipment Journal
