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三维适形放射治疗计划系统对胸部食管癌常规放疗计划肿瘤剂量的评估 被引量:2

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摘要 目的用三维适形放射治疗(3DCRT)计划系统评估胸部食管癌传统三野放疗计划的肿瘤剂量分布。方法25例确诊为食管癌的患者均予胸部CT扫描,在CT上勾画大体肿瘤体积(GTV)、临床靶体积(CTV)、计划靶体积(PTV),在3DCRT计划系统上制定2套治疗计划:常规治疗计划和3DCRT计划。结果食管造影所示病变平均长度6.45 cm,CT扫描平均长度9.42 cm,全组中位处方剂量66 Gy,常规放疗计划、3DCRT计划的GTV 100%体积剂量分别为36.066、63.795 Gy,GTV 95%体积剂量分别为47.552、65.865 Gy,CTV 95%体积剂量分别为34.051、63.752 Gy,可见3DCRT计划的GTV、CTV 100%、95%体积剂量均高于常规计划。结论传统的食管癌设野定位方法不能满足放射治疗的临床剂量学要求,应采用CT定位通过3DCRT计划系统的方法来确定食管癌的照射方法。
出处 《肿瘤研究与临床》 CAS 2007年第4期275-276,共2页 Cancer Research and Clinic
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