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| Protection Level from CT Examination and Influential Factors in Shandong Province |
| YANG Ke, LIU Yi, ZHANG Wei, YU Xi-rong, LI Lian-bo, ZHANG Xian-peng, XIA Chun-dong |
| Shandong Center for Disease Control and Prevention, Jinan 250014 China |
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Abstract Objective To understand the radiation level outside CT room, distribution of protection measurements and influential factors in Shandong Province, and put forward the suggestions to the existing problems for promoting its rationalization. Methods According to Radiological protection requirements for X-ray computed tomography (GBZ 165-2012) and Requirements for radiological protection in medical X-ray diagnosis(GBZ 130-2013), the radiation level outside CT room was tested and protection measurements of CT was inspected in Shandong Province. Results In general, compared with the first survey, the mean absolute difference is 0.95 μSv/h, decreased by 76.6%,particularly, decreased by 82.3% for Pb window in CT room; in addition, the two surveys show that the lowest radiation level outside of CT examination room are from operating position of staff and wall. Conclusion The radiation level outside CT room is significantly improved in Shandong Province, especially, and mean dose value from the partial position of CT room has reached the level of natural background radiation in the second survey. Meanwhile, there is still some space to decline for mean dose from the other partial position of CT room and allocation of protection measurements.
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Received: 25 January 2016
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