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- W3029121261 abstract "目的 采用三维治疗计划系统比较食管癌常规三野照射和两种三维适形放疗(3DCRT)计划中肿瘤和正常组织的剂量分布.方法 随机选择食管癌患者10例,CT扫描定位.勾画肿瘤体积(GTV)、临床靶体积(CTV)和计划靶体积(PTV).设计常规三野、三野适形、五野适形3种设野.结果 (1)三野适形与常规三野比较:三野适形中GTV均在90%剂量线以内,而在常规三野计划中有50%(5/10)部分GTV在90%等剂量线以外;PTV的最小剂量、平均剂量差异均有统计学意义;脊髓剂量分布差异有统计学意义.(2)五野适形与三野适形比较:PTV最小剂量差异有统计学意义.五野适形中20、30 Gy包绕的百分体积变小,10 Gy包绕的百分体积增大,差异有统计学意义;脊髓最大剂量差异有统计学意义,但在安全范围内.结论 (1)三野适形计划的肿瘤和脊髓剂量分布优于常规三野放疗计划,尤其在病变较长时更有优势;(2)五野适形较三野适形肿瘤剂量分布更趋均匀,双肺和脊髓剂量都在安全范围内。" @default.
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- W3029121261 date "2007-01-28" @default.
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- W3029121261 title "Comparison of the dose distribution in conventional and conformal radiotherapy by 3DRTP for esophageal carcinoma" @default.
- W3029121261 doi "https://doi.org/10.3760/cma.j.issn.1006-9801.2007.01.008" @default.
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