体表定位线对鼻咽癌放射治疗的影响  

Effect of Body Surface Positioning Line on Radiotherapy for Nasopharyngeal Carcinoma

作　　者：牛颢清 齐斌 曾杰 陈锦辉 邹力 雷耀良 NIU Haoqing;QI Bin;ZENG Jie;CHEN Jinhui;ZOU Li;LEI Yaoliang(Department of Radiotherapy,Affiliated Cancer Hospital and Institute of Guangzhou Medical University,Guangzhou Guangdong 510091,China)

机构地区：[1]广州医科大学附属肿瘤医院放射治疗科,广东广州510091

出　　处：《中国医疗设备》2024年第6期49-54,共6页China Medical Devices

摘　　要：目的探讨体表定位线对鼻咽癌放射治疗的影响。方法选取两种不同固定方式的184例鼻咽癌放疗患者为研究对象,A组采用U型定位膜+聚氨酯头枕固定,B组采用S型定位膜+发泡胶定位垫固定;每周行一次锥形束CT扫描校正体位,记录摆位误差;根据患者体表定位线的有/无,分别记作A1/A0组和B1/B0组;各组间行两两配对t检验,并按不同年龄段进行对比。结果各组摆位误差从小到大依次为B1组、B0组、A1组、A0组。其中,A0组与B1组线性摆位误差分别为(0.24±0.08)、(0.33±0.15)、(0.33±0.07)cm和(0.13±0.06)、(0.16±0.07)、(0.15±0.08)cm;旋转摆位误差分别为(1.60±0.60)°、(1.30±0.60)°、(1.50±0.70)°和(0.90±0.40)°、(0.80±0.40)°、(0.80±0.30)°。整体摆位误差在B1组和A0组之间差异有统计学意义(P<0.05),各年龄段之间摆位误差差异无统计学意义(P>0.05)。结论体表定位线结合S型定位膜+发泡胶定位垫可提高鼻咽癌放疗靶区摆位精度,具有临床实际意义。Objective To investigate the effect of body surface positioning line on radiotherapy of nasopharyngeal carcinoma.Methods A total of 184 cases of nasopharyngeal carcinoma radiotherapy patients with two different fixation methods were selected as the study objects.Group A was fixed with U-shaped positioning membrane+polyurethane headrest,and group B was fixed with S-shaped positioning membrane+polyurethane foam positioning pad.CBCT scan was performed once a week to correct the position and record the positioning error.According to the presence or absence of the patient’s body surface positioning line,they were recorded as A1/A0 group and B1/B0 group,respectively.Pairwise paired t-test was performed among the groups and compared according to different age groups.Results The setup errors of each group from small to large were B1 group,B0 group,A1 group and A0 group.The linear setup errors of A0 group and B1 group were(0.24±0.08),(0.33±0.15),(0.33±0.07)cm and(0.13±0.06),(0.16±0.07),(0.15±0.08)cm,respectively.The rotational setup errors were(1.60±0.60)°,(1.30±0.60)°,(1.50±0.70)°and(0.90±0.40)°,(0.80±0.40)°,(0.80±0.30)°,respectively.The overall setup error was statistically significant between B1 group and A0 group(P<0.05).There was no significant difference in setup error between different age groups(P>0.05).Conclusion The body surface positioning line combined with S-type positioning film+polyurethane foam positioning pad can improve the positioning accuracy of nasopharyngeal carcinoma radiotherapy target area,and has clinical practical significance.

关 键 词：鼻咽癌 体表定位线 发泡胶 体位固定 摆位误差 

分 类 号：R730.55[医药卫生—肿瘤] R197.39[医药卫生—临床医学]