Organ and effective dose evaluation in diagnostic radiology based on in-phantom dose measurements with novel photodiode-dosemeters
Organ and effective dose evaluation in diagnostic radiology based on in-phantom dose measurements with novel photodiode-dosemeters
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DOI：
10.1093/rpd/nci372
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发表时间：
2006-01-01
影响因子：
1
通讯作者：
Mori, Masaki
中科院分区：
文献类型：
--
作者：
Kawaura, Chiyo;Aoyama, Takahiko;Mori, Masaki
采用拟人幻影仪和新型剂量测定系统，对临床胸腹X线检查患者的器官和有效剂量进行了评估。该系统由34个针脚光电二极管剂量计组成，放置在拟人化幻影的特定组织或器官上，其中的组织和器官由国际放射防护委员会（ICRP）定义，以估计有效剂量。剂量计信号直接在个人计算机上获取，并转换成吸收剂量，由吸收剂量在计算机上评估器官和有效剂量。我们的研究表明，在常规胸部和腹部x线摄影中，器官剂量范围为< 0.01至0.72 mGy，在常规计算机断层扫描（CT）检查中，使用当前的多层CT扫描仪，器官剂量范围为0.07至55.91 mGy。胸部CT检查的有效剂量约为胸片检查的300倍。
Organ and the effective doses of patients undergoing clinical X ray examinations of chest and abdomen were evaluated with an anthropomorphic phantom and a new dosimetry system. The system was comprised of 34 pin photodiode dosemeters placed in/on particular tissues or organs of the anthropomorphic phantom, where the tissues and organs are defined by the International Commission on Radiological Protection (ICRP) to estimate the effective doses. Dosemeter signals were acquired on a personal computer directly, and converted into absorbed doses, from which the organ and the effective doses were evaluated on the computer. Our study showed that organ doses ranged from < 0.01 to 0.72 mGy in routine X-ray radiography of chest and of abdomen and from 0.07 to 55.91 mGy in routine computed tomography (CT) examinations with current multi-slice CT scanners. The effective dose observed in the chest CT examination was approximately 300 times higher than that in chest radiography.