食管癌三维适形放疗和常规放疗比较

Comparison of Three Dimensional Conformal Radiation Therapy and Conventional Radiation Therapy for Esophageal Carcinoma

目的对比研究三维适形放疗(3DCRT)和常规模拟机定位放疗两种不同方法在食管癌放射治疗中的优缺点。方法 20例食管癌患者采用3DCRT方法进行治疗,应用同一治疗计划系统,制定适形放疗和常规模拟机定位放疗方案。结果与常规模拟定位机定位放疗相比,食管癌照射中3DCRT有最好的剂量分布,既可明显提高靶区的剂量,同时能较好地保护正常组织。结论食管癌的适形放疗技术能降低正常组织的放射损伤和并发症,提高放疗治疗的适形度,改善靶区的剂量分布。

Objective To assess and compare the advantages and disadvantages of three dimensional conformal radiation therapy（3DCRT）,3DCRT and the simulator-guided radiation therapy for patients with esophageal carcinoma.Methods Twenty patients with esophageal carcinoma were treated by three dimensional conformal radiation therapy,at the same TPS,three Dimensional conformal radiation therapy target and normal tissue of three radiotherapies were simulated.Results Compared with simulator-guided radiation therapy,3DCRT planning has better dose distribution and protection of normal tissue.Conclusion Esophageal cancer conformal radiotherapy can reduce the radiation injury of the normal tissue and complications,and improve treatment of conformal radiotherapy and the target dose distribution.