不同体位固定方式对头颈部肿瘤摆位误差的影响

Influence of postural immobilization option on positioning error of head and neck tumors

探讨不同的体位固定方式对头颈部肿瘤摆位误差的影响及三种固定方式下头颈部肿瘤的外扩边界。研究发现三组患者在腹背方向(AP)、头脚方向(SI)、左右方向(LR)的摆位误差的差异无统计学意义。在临床放射治疗中,头部以及上颈部靶区,三种固定方式均可。存在肩部靶区患者采用头颈肩真空垫加头颈肩热塑膜的固定方式。

The purpose of this study was to investigate the influence of postural immobilization options on positioning error of head and neck tumors,as well as the outer boundary of head and neck tumors with three postural immobilization options.The study did not found statistically significant difference in the positioning errors in anterior-posterior(AP),superior-inferior(SI)and left-right(LR)dimensions among the three groups of patients.In the setting of clinical radiotherapy,the three postural immobilization options are equivalent for target areas at the head and upper neck.For additional target areas located at the shoulder,patients are immobilized with a head-neck-shoulder vacuum pad plus a head-neck-shoulder thermoplastic mask.