[1]曹婷婷,全红,刘晖,等.联影直线加速器新型全碳素纤维治疗床对放疗剂量的影响[J].中国医学物理学杂志,2018,35(1):14-18.[doi:DOI:10.3969/j.issn.1005-202X.2018.01.004]
 CAO Tingting,QUAN Hong,LIU Hui,et al. Effects of a new carbon fiber couch of linear accelerator on radiotherapy dose[J].Chinese Journal of Medical Physics,2018,35(1):14-18.[doi:DOI:10.3969/j.issn.1005-202X.2018.01.004]
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联影直线加速器新型全碳素纤维治疗床对放疗剂量的影响
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
35卷
期数:
2018年第1期
页码:
14-18
栏目:
医学放射物理
出版日期:
2018-02-07

文章信息/Info

Title:
 Effects of a new carbon fiber couch of linear accelerator on radiotherapy dose
文章编号:
1005-202X(2018)01-0014-05
作者:
 曹婷婷1全红1刘晖2张俊2蒋大振2苏欢繁1
 1.武汉大学物理科学与技术学院, 湖北 武汉 430072; 2.武汉大学中南医院放疗科, 湖北 武汉 430071
Author(s):
 CAO Tingting1 QUAN Hong1 LIU Hui2 ZHANG Jun2 JIANG Dazhen2 SU Huanfan1
 1. School of Physics and Technology, Wuhan University, Wuhan 430072, China; 2. Department of Radiation Oncology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China
关键词:
 直线加速器碳纤维治疗床衰减因子放疗剂量
Keywords:
 Keywords: linear accelerator carbon fiber treatment couch attenuation factor radiotherapy dose
分类号:
R815.6; TH774
DOI:
DOI:10.3969/j.issn.1005-202X.2018.01.004
文献标志码:
A
摘要:
 目的:研究联影直线加速器新型全碳素纤维床床板对放疗剂量的影响。 方法:将固体水分别置于治疗床中间(offset=0 cm)、右侧(offset=+10 cm)以及左侧(offset=-10 cm),改变机臂角度,让高能X射线从不同角度穿透治疗床,计算出相对应的衰减因子。 结果:对于6 MV的X射线,治疗床板中间处的衰减因子范围是0.043 8~0.085 0,在115°时衰减因子最大;右侧位置的衰减因子范围是0.044 1~0.127 2,在110°时衰减因子最大;左侧位置的衰减因子范围是0.043 2~0.093 1,在110°时衰减因子最大。在180°~130°区间时,治疗床中间、右侧和左侧位置的衰减因子之间的差异较小,且右侧衰减因子高于中间和左侧处。 结论:不同的机架角度,在联影直线加速器新型全碳素纤维治疗床床板上不同的位置,对X射线的衰减程度不同。治疗床右侧位置在130°~110°区间对剂量的衰减高于中间和左侧,且在110°时衰减最大,在设计患者后斜野计划时应该尽量避开对剂量衰减程度大的角度。
Abstract:
 Abstract: Objective To investigate the effects of a new carbon fiber couch of linear accelerator from Shanghai United Imaging Healthcare Co., Ltd on the radiotherapy dose. Methods The solid water phantom were placed in the middle (offset=0 cm), the right (offset=+10 cm) and the left (offset=-10 cm) of the treatment couch. The angle of gantry was changed to make the high-energy X-ray penetrate the treatment couch from different angles, and the corresponding attenuation factors of X-ray were calculated. Results The attenuation factors for 6 MV X-ray were 0.043 8-0.085 0 at the middle of the treatment couch, with a maximum attenuation factor at 115°; 0.044 1-0.127 2 at the right side of the treatment couch, with a maximum attenuation factor at 110°; 0.043 2-0.093 1 at the left side of the treatment couch, with a maximum attenuation factor at 110°. When the gantry angle was 180°-130°, the differences among the attenuation factors at the middle, the right and the left of the treatment couch were trivial, but the attenuation factor was higher at the right than at the middle and the left. Conclusion The attenuation of the new carbon fiber treatment couch of linear accelerator from Shanghai United Imaging Healthcare Co., Ltd varies at different positions with different angles of gantry. When the gantry angle was 130°-110°, the dose attenuation is higher at the right side of the treatment couch that at the middle and the left, and the maximum is at 110°. Those angles causing larger dose attenuations should be avoided in oblique field plan.

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备注/Memo

备注/Memo:
 【收稿日期】2017-08-07
【基金项目】医科达-武汉大学医学物理教学科研基金
【作者简介】曹婷婷,在读硕士,研究方向:医用放射治疗技术,E-mail: 741539965@qq.com
【通信作者】全红,副教授,博士生导师,研究方向:放射治疗、医学影像,E-mail: cps6606@sina.com
更新日期/Last Update: 2018-01-25