Radiation exposure of patients who undergo CT of the trunk.
Radiation exposure of patients who undergo CT of the trunk.
复制标题
接受躯干 CT 治疗的患者的辐射暴露。
DOI：
10.1148/radiology.195.2.7724783
复制
发表时间：
1995
期刊：
影响因子：
19.7
通讯作者：
P. Schneeberger
中科院分区：
文献类型：
--
作者：
R L Mini;P. Vock;R. Mury;P. Schneeberger
目的
PURPOSE
To determine the radiation dose delivered to organs during standard computed tomographic (CT) examination of the trunk.
MATERIALS AND METHODS
In vivo locations and sizes of specific body organs were determined from CT images of patients who underwent examinations. The corresponding CT investigations were then simulated on an anthropomorphic phantom. The resulting doses were measured at 70 different sites inside the phantom by using thermoluminescent dosimeters. On the basis of measurements of free-in-air air kerma at the rotation axis of the CT gantry, conversion factors were calculated so that measurements could be used with different models of CT equipment.
RESULTS
Starting from the dose values recorded, the mean organ doses were determined for 21 organs. The skin received 22-36 mGy; the lungs, less than 1-18 mGy; the kidneys, 7-24 mGy; and the ovaries, less than 1-19 mGy, depending on the type of CT examination performed.
CONCLUSION
These values are high compared with other x-ray examinations and should be minimized as much as possible. The number of tomographic sections obtained should be kept as low as possible according to diagnostic need.