[1] Mok H,Crane CH,Palmer MB,et al. Intensity modulated radiation therapy(IMRT):differences in target volumes and improvement in clinically relevant doses to small bowel in rectal carcinoma[J/OL][2013-8-20]. Radiat Oncol,2011,6:63. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3121606/. [2] Samuelian JM,Callister MD,Ashman JB,et al. Reduced acute bowel toxicity in patients treated with intensity-modulated radiotherapy for rectal cancer[J]. Int J Radiat Oncol Biol Phys,2012,82:1981-1987. [3] Li JL,Ji JF,Cai Y,et al. Preoperative concomitant boost intensity-modulated radiotherapy with oral capecitabine in locally advanced mid-low rectal cancer: a phase Ⅱ trial[J]. Radiother Oncol,2012,102:4-9. [4] Otto K. Volumetric modulated arc therapy: IMRT in a single gantry arc[J]. Med Phys,2008,35:310-317. [5] 杨波,庞廷田,孙显松,等.宫颈癌术后盆腔容积调强弧形治疗与固定野调强放疗计划的剂量学研究[J].中华放射肿瘤学杂志,2012,21:543-546. [6] Lu SH,Cheng JC,Kuo SH,et al. Volumetric modulated arc therapy for nasopharyngeal carcinoma: a dosimetric comparison with TomoTherapy and step-and-shoot IMRT[J]. Radiother Oncol,2012,104:324-330. [7] Cilla S,Caravatta L,Picardi V,et al. Volumetric modulated arc therapy with simultaneous integrated boost for locally advanced rectal cancer[J]. Clin Oncol,2012,24:261-268. [8] Baglan KL,Frazier RC,Yan D,et al. The dose-volume relationship of acute small bowel toxicity from concurrent 5-FU-based chemotherapy and radiation therapy for rectal cancer[J]. Int J Radiat Oncol Biol Phys,2002,52:176-183.