【摘 要】
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目的：比较分析强度调控放射治疗（intensity-modulated radiation therapy,IMRT）与三维适形放射治疗（three-dimensional conformal radiotherapy,3D-CRT）在食管胸中段癌放疗剂量学
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目的：比较分析强度调控放射治疗（intensity-modulated radiation therapy,IMRT）与三维适形放射治疗（three-dimensional conformal radiotherapy,3D-CRT）在食管胸中段癌放疗剂量学的不同,为优化食管中段癌的放射治疗提供理论依据。方法：应用调强放疗治疗计划系统治疗食管胸中段癌16例,分别用IMRT及3D-CRT设计两种放疗计划,应用剂量体积直方图（dose-volume histogram,DVH）比较两种计划的PTV靶区各项参数
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