【摘要】 目的 分析锥形束CT扫描引导下不同固定方式在宫颈癌放疗中摆位误差大小。方法 选取2019年6月—2020年9月在江西省人民医院放疗室VARIAN Trilogy直线加速器上接受放疗的60例宫颈癌患者，随机分为观察组和对照组，每组30例。观察组：使用盆腔真空垫加热塑体罩固定法。对照组：采用B型固定枕加M型泡沫脚垫固定双踝关节法。对两种固定方式治疗时摆位误差数据进行对比，统计放疗并发症发生率。结果 2组在左右方位（LAT）摆位误差比较，差异无统计学意义（P>0.05）；观察组在背腹方位（VRT）和头脚方位（LNG）摆位误差低于对照组，差异有统计学意义（P<0.05）。观察组白细胞下降，消化系统损伤、放射性肠炎发生率明显低于对照组（P<0.05）。结论 宫颈癌患者放疗采用不同体位固定方式摆位误差有差异，垫+罩法与B+M法相比，在LNG和VRT上的摆位误差显著降低，垫+罩法比B+M法重复性好、精准度高。更多还原

【Abstract】 Objective To analyze the magnitude of positional errors in radiotherapy for cervical cancer under cone-beam CT scan guidance with different fixation methods. Methods Sixty patients with cervical cancer who received radiotherapy on the VARIAN Trilogy linear gas pedal in the radiotherapy unit of Jiangxi Provincial People’s Hospital from June2019 to September 2020 were selected and randomly divided into an observation group and a control group, with 30 cases in each group. Observation group:The pelvic vacuum pad heated plastic hood fixation method was used. Control group:using B-type fixation pillow plus M-type foam foot pad fixation method for both ankles. The positional error data were analyzed for both fixation methods during treatment. Results There was no statistically significant difference between the two groups in the analysis of positional error in left-right orientation(LAT)(P > 0.05);the observation group had lower positional error in dorso-ventral orientation(VRT)and head-foot orientation(LNG)than the control group, and the difference was statistically significant(P< 0.05). Conclusion There were differences in the positional errors of radiotherapy for cervical cancer patients using different body fixation methods, and the positional errors on LNG and VRT were significantly lower in the pad+mask method compared with the B+M method, and the pad+mask method was more reproducible and accurate than the B+M method.更多还原