[1] Rao M,Yang W,Chen F,et al Comparison of elekta VMAT with helical tomotherapy and fixed field IMRT: plan quality,delivery efficiency and accuracy[J]. Med Phys,2010,37:1350-1359. [2] Yin L,Wu H,Gong J,et al. Volumetric-modulated arc therapy vs c-IMRT in esophageal cancer: a treatment planning comparison[J]. World J Gastroenterol,2012,18:5266-5275. [3] 陈进琥,尹勇,刘同海,等.颈段食管癌固定野调强与旋转调强放疗计划比较研究[J].中华放射肿瘤学杂志,2010,19:429-433. [4] 刘同海,尹勇,陈进琥,等.鼻咽癌旋转调强与固定野调强同步加量计划比较研究[J].中华放射肿瘤学杂志,2010,19:486-490.