鼻咽癌调强适形放疗与常规放疗摆位误差的比较  

Comparison of Set-up Error Between Intensity Modulated Radiation Therapy and Conventional Radiotherapy in Nasopharyngeal Carcinoma

作　　者：周桂娥[1] 韦汉荣[1] 陆锋[1] 李文庄[1] 

机构地区：[1]广西壮族自治区肿瘤医院放疗科,广西南宁530021

出　　处：《实用预防医学》2008年第4期1205-1207,共3页Practical Preventive Medicine

摘　　要：目的比较鼻咽癌调强适形放疗与常规放疗的摆位误差。方法139例鼻咽癌患者分别接受常规外照射放疗(n=56)和调强适形放射治疗(IMRT)(n=83)。分别测量常规组和IMRT组的摆位误差并进行统计学处理。结果常规组O点误差(3.01±1.78mm)、X轴误差(3.85±2.03mm)、Y轴误差(3.69±2.08mm)和Z轴误差(3.12±2.12mm)明显大于IMRT组的误差(1.76±0.74mm,1.45±0.86mm,1.27±0.93mm和1.87±1.04mm),差异有统计学意义(P<0.05)。结论IMRT技术的摆位误差较常规放疗的小,而且在体位固定、靶区定位、射野控制等方面具有明显优势。Objective To compare the set- up error between the intensity modulated radiation therapy （IMRT） and the conventional radiotherapy in nasopharyngeal carcinoma （NPC）. Methods Totally 139 patients with NPC were divided into conventional radiotherapy group （n= 56） and IMRT group （n= 83）. The set-up errors of the all patients were measured and statistically analyzed. Results The set - up errors of the conventional radiotherapy group were significantly larger than those of the IMRT group in O position, X axis direction, Y axis direction and Z axis direction （3.01 ± 1.78 mm, 3.85 ± 2.03 mm, 3.69±2.08 mm, and 3.12±2.12 mm vs 1.76±0.74 mm, 1.45±0.86 mm, 1.27±0.93 mm and 1.87± 1.04 mm）; there were statistical differences between the two groups （ P〈 0.05）. Conclusions The set - up error of the IMRT is smaller than that of the conventional radiotherapy, and there are significant benefits in body position fixing, target area fixing and portal image control.

关 键 词：鼻咽癌 调强适形放疗 常规放疗 摆位误差 

分 类 号：R739.63[医药卫生—肿瘤]