成年受检者数字断层融合扫描有效剂量估算  

Estimation of effective dose to examined adult patients during digital tomosynthesis

作　　者：张琳[1] 朱建国[1] 刘长才[1] 宋钢[1] 刘伟[1] 李玉升 刘芳[1] 陈跃[1] 卞华慧[3] 刘玉龙[3] Zhang Lin;Zhu Jianguo;Liu Changcai;Song Gang;Liu Wei;Li Yusheng;Liu Fang;Chen Yue;Bian Huahui;Liu Yulong(Institute of Radiation Medicine, Shandong Academy of Medical Science, Jinan 250062, Chin;Clinic Department of Women and Children＇s Health Care Hospital of Linyi, Linyi 276000, China;Department of Nuclear Emergency Center, Second Affiliated Hospital of Soochow University, Suzhou 215004, Chin)

机构地区：[1]山东省医学科学院放射医学研究所,济南250062 [2]山东省临沂市妇女儿童医院门诊部,临沂276000 [3]苏州大学附属第二医院应急中心,215004

出　　处：《中华放射医学与防护杂志》2018年第6期451-455,共5页Chinese Journal of Radiological Medicine and Protection

基　　金：山东省医药卫生科技发展计划项目（2013WS0361）

摘　　要：目的 估算数字断层融合扫描时组织、器官吸收剂量和受检者有效剂量，为辐射剂量学提供数据参考。方法 按照受检者检查部位（主射束扫描部位）将体模实验分组，以放射科现场收集的数字断层融合扫描人体不同部位时实时显示的数据作为体模实验的条件，对体模进行扫描，计算组织、器官的吸收剂量，并估算成年受检者的有效剂量。结果 成年受检者采用数字断层融合扫描时有效剂量分别为头部组0.524 mSv、颈椎组0.736 mSv、胸椎组2.719 mSv、胸部组1.810 mSv、腰椎组1.240 mSv、腹部组2.317 mSv、骨盆组2.316 mSv。结论 数字断层融合扫描时，成年受检者有效剂量的估算结果为胸椎组最高，其次为腹部组，头部组最小，有效剂量主要相关因素为管电压、总mAs、照射野大小、主射束照射范围、扫描范围内组织或器官的数量。Objective To estimate the absorbed dose and effective dose to the examined adult patients during digital tomosynthesis and to provide reference data for radiation dosimetry. Methods The phantom experiments were grouped according to the examined site （main beam scanned site）, and the data displayed in real time during digital tomosynthesis are used as conditions for the phantom experiments. The effective doses to the examined patients were estimated on the basis of phantom scanning and tissue-absorbed dose calculation. Results During digital tomosynthesis, the effective doses to the examined patients of various groups were 0.524 mSv for head, 0.736 mSv for cervical spine, 2.719 mSv for thoracic vertebra, 1.810 mSv for chest, 1.240 mSv for lumbar spine, 2.317 mSv for abdomen and 2.316 mSv for pelvis, respectively. Conclusions During digital tomography, the highest value of effective doses was estimated to be 2.719 mSv in thoracic vertebra group, followed by abdominal group 2.317 mSv and pelvic group 2.316 mS, with the lowest 0.524 mSv in head group. The main factors influencing the effective dose include tube voltage, total mAs, irradiation field size, main beam irradiation range, and the number of tissues or organs in scanned range.

关 键 词：数字断层融合 体模 组织权重因子 有效剂量 

分 类 号：R814.2[医药卫生—影像医学与核医学]