Effective dose determination using an anthropomorphic phantom and metal oxide semiconductor field effect transistor technology for clinical adult body multidetector array computed tomography protocols
Effective dose determination using an anthropomorphic phantom and metal oxide semiconductor field effect transistor technology for clinical adult body multidetector array computed tomography protocols
复制标题
DOI：
10.1097/rct.0b013e31802d3dd2
复制
发表时间：
2007-07-01
影响因子：
1.3
通讯作者：
Lowry, Carolyn
中科院分区：
文献类型：
--
作者：
Hurwitz, Lynne M.;Yoshizumi, Terry T.;Lowry, Carolyn
目的：确定使用标准临床成人身体成像协议时通过多探测器阵列计算机断层扫描（MDCT）传递到拟人体模的器官剂量和全身有效剂量（艾德）。材料和方法：金属氧化物半导体场效应晶体管（MOSFET）技术应用于女性拟人化体模扫描，以确定临床身体计算机断层扫描（CT）期间提供的20个器官剂量成像方案。使用16排MDCT扫描仪（LightSpeed，General Electric Healthcare，密尔沃基，威斯康星州）。有效剂量计算为器官剂量之和乘以国际辐射防护委员会出版物60中的加权因子行列式。结果：体部MDCT成像方案的有效剂量（mSv）分别为：标准胸部CT，6.80 ± 0.6，肺栓塞CT，13.7 ± 0.4，门控冠状动脉CT，20.6 ± 0.4，门控冠状动脉CT，20.6 ± 0.4，门控冠状动脉CT，20.6 ± 0.4。标准腹盆腔CT为13.3 ± 1.0，肾结石CT为4.51 ± 0.45。在体模中的直接器官测量计算的有效剂量是14%至37%大于由DLP methods.Conclusions确定的：有效剂量由DLP方法计算低估艾德相比，直接器官测量相同的CT检查。器官剂量和全身艾德比先前报道的MDCT临床身体成像方案更高。
Purpose: To determine the organ doses and total body effective dose (ED) delivered to an anthropomorphic phantom by multidetector array computed tomography (MDCT) when using standard clinical adult body imaging protocols.Materials and Methods: Metal oxide semiconductor field effect transistor (MOSFET) technology was applied during the scanning of a female anthropomorphic phantom to determine 20 organ doses delivered during clinical body computed tomography (CT) imaging protocols. A 16-row MDCT scanner (LightSpeed, General Electric Healthcare, Milwaukee, Wis) was used. Effective dose was calculated as the sum of organ doses multiplied by a weighting factor determinant found in the International Commission on Radiological Protection Publication 60. Volume CT dose index and dose length product (DLP) values were recorded at the same time for the same scan.Results: Effective dose (mSv) for body MDCT imaging protocols were as follows: standard chest CT, 6.80 +/- 0.6; pulmonary embolus CT, 13.7 +/- 0.4; gated coronary CT angiography, 20.6 +/- 0.4; standard abdomen and pelvic CT, 13.3 + 1.0; renal stone CT, 4.51 + 0.45. Effective dose calculated by direct organ measurements in the phantom was 14% to 37% greater than those determined by the DLP method.Conclusions: Effective dose calculated by the DLP method underestimates ED as compared with direct organ measurements for the same CT examination. Organ doses and total body ED are higher than previously reported for MDCT clinical body imaging protocols.