三维适形放疗照射野在模拟机下的摄片验证实践  

The verification and follow on with simulator for radiography of radiation field for three dimensional conformal radiotherapy

作　　者：胡中友[1] 卢宏[1] 郎琦志[1] 汪德明[1] 盛泽平[1] 李同文[1] 

机构地区：[1]安徽省铜陵市人民医院放疗科,244009

出　　处：《蚌埠医学院学报》2010年第3期290-292,共3页Journal of Bengbu Medical College

摘　　要：目的:提供一种实用且简易的验证三维适形放疗(three dimensional conformal radiotherapy,3DCRT)计划照射野精度的方法。方法:应用模拟定位机对204例3DCRT计划的适形野进行摄片,将适形野扫描到LANTIS系统,与计划系统给出的照射野验证比较,评估其与计划适形野的吻合性及误差原因。结果:头颈部肿瘤的适形野吻合性较好,XY两方向误差都在5 mm以内,胸腹部肿瘤适形野与计划野的偏差最大达12 mm。结论:该方法操作简便,投资少,实用性强,特别适合地市级医院应用3DCRT治疗技术的放疗部门。模拟机验证同时能观察病灶和周围危及器官的受照情况。Objective： To provide a simple and useful method of verifying the accuracy position of the radiation fields for three dimensional conformal radiotherapy plan. Methods： A simulator was used to take the radiography of 204 cases of conformal fields planned by 3DCRT;the conformal field radiography was transported to LANTIS system and compared with the planning-buih fields; their coincidence and causes of error were observed and analyzed. Results： For the tumors on head and neck, the conformal field coincided well with the planning-built fields,and the errors in XY position was within 5 ram,but for tumors in chest and abdomen,the biggest error of field position was 12 mm. Conclusious：The method has the advantages of easy operation, low cost and practicability, adapting to the sections in middle-class hospitals using 3DCRT plan. The simulator verification can observe the tumor target and its nearby organs in risk at the same time.

关 键 词：放射疗法 三维适形放疗 模拟机 照射野 验证 

分 类 号：R815[医药卫生—放射医学]