The Comparison of Entrance Surface Radiation Dose to the Thyroid Gland Region in Different Dental Panoramic Radiography  

作　　者：Siyambalagoda Gamage Manuja Dilan Yasiru Ibashini Nuwan Kumari Herath Bimali Sanjeevani Weerakoon 

机构地区：[1]Department of Radiography/Radiotherapy,Faculty of Allied Health Sciences,University of Peradeniya,Peradeniya 20400,Sri Lanka

出　　处：《Journal of Health Science》2020年第3期83-86,共4页健康科学（英文版）

摘　　要：Introduction:The proven radio sensitivity and the position of the thyroid gland make it a significant organ during the dental radiography exposure.Objectives:This study compared the surface radiation dose to the thyroid gland region during two different techniques of two dimensional(2D)conventional orthopantomography(OPG)and three dimensional(3D)OPG reconstructed from cone beam computed tomography(CBCT).Methods:The entrance surface dose to the thyroid region of the patients was evaluated using a personal dosimeter in a sample of 156 patients who prescribed for an OPG examination.Results:The obtained mean dose values for conventional OPG and reconstructed OPG from CBCT are 7.47μSv and 28.65μSv,respectively.Further a significant difference(p<0.05)was observed between those two doses.Conclusions:A significant amount of dose reduction to the thyroid gland region can be obtained when using conventional OPG compared to the CBCT.

关 键 词：ORTHOPANTOMOGRAPHY cone beam computed tomography thyroid gland region. 

分 类 号：R78[医药卫生—口腔医学]