体位真空袋在胸部肿瘤放疗中的应用探讨  

Application of Vacuum Pump in Radiation Therapy of Thoracic tumor

作　　者：潘启勇[1] 唐彩华[1] 丁秋娥[1] 姜仁伟[1] 王思阳[1] 程志斌[1] 

机构地区：[1]中山大学附属第五医院放疗科,珠海519000

出　　处：《中国临床实用医学》2010年第10期114-115,共2页China Clinical Practical Medicine

摘　　要：目的探讨体位真空袋在胸部肿瘤放疗中的应用。方法随机抽取实施胸部放疗的患者60例，分成A、B、C三组。每组20例，A组行常规固定技术放疗；B组行体位真空袋固定技术放疗；C组在真空袋固定技术基础上，在患者胸部两侧标记水平参考线。各组均拍摄正、侧位验证片，并每周拍摄验证片与初始验证片相比较。结果各组在X、Y、Z轴方向的摆位误差结果：A组X=（5．3±2．8）mm，Y=（3．8±2．3）mm，Z=（6．7±3．3）mm；B组X=（3．6±1．7）mm，Y=（3．2±1．8）mm，Z=（6．2±2．6）mm；C组Z=（3．1±1．6）mm。其中A和B组的X轴数据比较有统计学意义，Y、Z轴则无统计学意义；B和C组的Z轴比较有显著的统计学意义。结论胸部放疗中，应用体位真空袋固定放疗技术能使X轴误差减少，Y、Z轴无改善。在应用真空袋基础上，在患者胸部皮肤上标记水平参考线能提高精确度，减少摆位误差。Objective To investigate the setup errors about application of vacuum pump in radiation therapy for the thoracic tumor. Methods Sixty patients of the thoracic tumor were divided three groups randomly. A group was without vacuum pump. B group was with reference level line on the thoracic skin. The verification films were taken per week from the first week to the end. A and B group in X-axis, Y-axis, Z-axis could be measured and C group were measured in Z-axis only. Results A group set up errors of X-axis, Y-axis, Z-axis wereS. 3 ± 2. 8 mm,3. 8 ＋ 2. 3 mm,6. 7 ± 3.3 mm. B groups set up errors were 3.6 ±1.7 mm,3.2 ± 1.8 mm,6. 2 ± 2. 6 mm. C group set up errors of Z-axis were 3.1 ±1.6 mm. Conclusion Analysis of setup error in three groups. B group can help to reduce X-axis matched of A group by using vacuum pump. C group by using reference level line can help to reduce Z-axis errors matched with B group.

关 键 词：胸部放疗 摆位误差 真空袋 

分 类 号：R730.55[医药卫生—肿瘤]