自制口腔电子线限光筒的设计及其剂量学分析  

Self-design and dosimetric analysis of intraoral electron Cone

作　　者：姚二华[1] 梁平[1] 刘光贤[2] 段继梅[2] 杨永林[2] 刘建民[1] 王志伟[2] 梁健宁 

机构地区：[1]广西中医药大学附属瑞康医院放疗科,广西南宁530011 [2]昆明医科大学第一附属医院放疗科,云南昆明650032

出　　处：《中国医学物理学杂志》2015年第3期387-390,共4页Chinese Journal of Medical Physics

基　　金：昆明医学院研究生创新基金(KM2007L04)

摘　　要：目的:自制一套口腔电子线限光筒,并对其剂量学参数进行测定分析。方法:自行设计并采用低熔点铅制作一批简易的用于口腔癌治疗的电子线限光筒,利用三维水箱、射束分析系统软件等进行测试分析,得出在一定的源皮距条件下,各型号限光筒的百分深度剂量、离轴比等,分析其特点及规律。结果:采用9 Me V电子束时测量的斜口口腔筒有效治疗深度(R85)为2.32 cm,射野为3.24 cm,采用12 Me V电子束时测量的有效治疗深度为2.88 cm,射野为3.14 cm;采用9Me V电子束时测量的平口口腔筒有效治疗深度为2.34 cm,射野为3.06 cm,采用12 Me V电子束时有效治疗深度为2.91cm,射野为3.05 cm。结论:该限光筒操作简便,制作成本低,适用于表浅、小的口腔癌治疗。Objective To measure and analyze dosimetric parameters of a set of self-design intraoral electron cone. Methods The low melting point lead was adopted to design simple electron intraoral cones for mouth neoplasms radiotherapy. Three dimensional water tank and beam analysis system software were applied for test analysis. The percentage depth dose and off axis ratio of different cones in determined source skin distance were obtained and their characteristics and rules were analyzed. Results For 9 Mev electron beam, the effective treating depth （P~） of oblique intraoral cone was 2.32 cm, and the field size was 3.24 cm, while that of fiat intraoral cone was 2.34 com and the field size was 3.06 cm. For 12 Mev electron beam, the effective treating depth of oblique intraoral cone was 2,88 cm, and the field size was 3.14 cm, while that of fiat intraoral cone was 2.91 cm and the field size was 3.05 cm. Conclusion The self-design intraoral cone was suitable to treat superficial and small mouth neoplasms for its simple operation and low manufacture cost.

关 键 词：口腔癌/放射疗法 电子线口腔限光筒 剂量学 

分 类 号：R730.55[医药卫生—肿瘤]