期刊
RADIOTHERAPY AND ONCOLOGY
卷 87, 期 2, 页码 274-280出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.radonc.2007.12.014
关键词
intensity-modulated radiotherapy; head and neck cancer; radiation technique; esophageal dose
Purpose: This study compares the radiation dose-volume of the cervical esophagus during head and neck radiotherapy using three different techniques. Methods: Treatment plans of 58 patients from 3/04 to 1/06 treated with bilateral head and neck radiotherapy were analyzed retrospectively. A comparison of the cervical esophagus dose with three-field 3D conformal RT (3DRT, n = 34), whole-field IMRT (WF-IMRT, n = 12), and half-beam IMRT (HB-IMRT, n = 12) was performed. The volumes of esophagus receiving >= 50 Gy (V50), >= 54 Gy (V54) and >= 60 Gy (V60) and lengths receiving circumferential dose >= 50 Gy (L50) and >= 54 Gy (L54) were evaluated. Results: Maximum dose, V54 and L54 were greater for the first 2 cm and entire cervical esophagus with WF-IMRT than HB-IMRT or 3DRT. In patients requiring a high match, WF-IMRT was associated with a greater maximum dose, V54 and L54 than HB-IMRT and 3DRT (p < 0.05). In the low match group, WF-IMRT was associated with a greater V54 and L54 (p < 0.05). Low neck disease, low primary site, and definitive radiotherapy were associated with increased irradiation of the esophagus. Conclusion: Treatment of the lower neck with IMRT is associated with increased irradiation to the cervical esophagus, and dose constraints should be included to reduce toxicity. (C) 2007 Elsevier Ireland Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据