西南医科大学学报2019，Vol.42Issue(1)：62-65,4.DOI:10.3969/j.issn.2096-3351.2019.01.013
宫颈癌放疗中股骨头的剂量研究
A dosimetric study of thefemoral head in cervical cancer radiotherapy
刘小龙 1庞皓文 1徐玮1
作者信息
- 1. 西南医科大学附属医院肿瘤科, 四川泸州 64600
- 折叠
摘要
Abstract
Objective: To study the effect of internal and external beam radiotherapy on the dose to the femoral head in cervical cancer radiotherapy. Methods: A retrospective analysis was performed on the external beam radiotherapy and brachytherapy planforten patients with cervical cancer who were randomly selected and received preoperative radiotherapy. The femoral head dose to 5％ of the volume (D5) of each patient at different prescribeddoses was calculated and the corresponding equivalent dose in 2 Gy per fraction (EQD2, the radiation dose given under the unconventionallyfractionated condition, which is equivalent to the dose under the conventionallyfractionated irradiation condition of 2 Gy/F) was calculated, and the calculated EQD2 value of the femoral head D5 afterexternal beam radiotherapywas added tothe EQD2 value corresponding to the internal beam radiotherapy. Results: At a prescribed dose of 5 000 cGy/28 F, the total EQD2 of the femoral head D5 was greater than 5 000 cGy in three of theten patients, accounting for about 30％; at aprescribed dose of 4 800 cGy/26 F, the total EQD2 of the unilateral femoral head D5 was greater than 5 000 cGy in three patients;the total EQD2 of the femoral head D5 in 10 patients did not exceed5000 cGy at a prescribed dose of 4 500 cGy/25 F. Conclusion: For patients with cervical cancer who receive preoperativeradiotherapy, the contribution ofbrachytherapy to the femoral head dose should be fully considered.关键词
后装放疗/股骨头/剂量/EQD2Key words
Brachytherapy/Femoral head/Dose/Equivalent dose in 2Gyper fraction分类
医药卫生引用本文复制引用
刘小龙,庞皓文,徐玮..宫颈癌放疗中股骨头的剂量研究[J].西南医科大学学报,2019,42(1):62-65,4.
