Kim Sangroh, Sopko David, Toncheva Greta, Enterline David, Keijzers Bruno, Yoshizumi Terry T
Medical Physics Graduate Program, Duke University, Durham, NC 27705, USA.
Radiat Prot Dosimetry. 2012 Jun;150(1):50-4. doi: 10.1093/rpd/ncr369. Epub 2011 Sep 16.
The purpose of this study was to measure organ doses and the effective dose (ED) using a three-dimensional rotational X-ray (3D-RX) system and to determine the ED conversion factor from the dose area product (DAP) for skull, spine and biliary protocols. A commercial 3D-RX imaging system was used to simulate the protocols with the adult female anthropomorphic phantom. Twenty MOSFET detectors were used to measure the absorbed doses at various organ locations. The ED was calculated for each protocol and the corresponding DAP was obtained. The skin dose was the highest for all the protocols. The second highest organ doses were those of the brain for the skull, the intestine for the spine and the kidney for the biliary protocol. The ED was 0.4-0.9, 4.2-8.4 and 3.2-4.6 mSv, and the ED conversion factor was 0.06-0.09, 0.18-0.31 and 0.13-0.23 mSv Gy(-1) cm(-2) for each protocol, respectively. This data may be used to estimate the patient ED for those protocols in the 3D-RX.
本研究的目的是使用三维旋转X射线（3D-RX）系统测量器官剂量和有效剂量（ED），并确定颅骨、脊柱和胆道检查方案中从剂量面积乘积（DAP）到ED的转换系数。使用商用3D-RX成像系统对成年女性人体模型模拟这些检查方案。使用20个金属氧化物半导体场效应晶体管（MOSFET）探测器测量不同器官位置的吸收剂量。计算每个检查方案的ED并获得相应的DAP。所有检查方案中皮肤剂量最高。颅骨检查方案中第二高的器官剂量是脑部，脊柱检查方案中是肠道，胆道检查方案中是肾脏。每个检查方案的ED分别为0.4 - 0.9、4.2 - 8.4和3.2 - 4.6 mSv，ED转换系数分别为0.06 - 0.09、0.18 - 0.31和0.13 - 0.23 mSv Gy(-1) cm(-2)。这些数据可用于估计3D-RX中那些检查方案的患者ED。
