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| Formulation and Analysis of Reference Dose from CT Head Scanning in Shandong Province |
| YANG Ke, LIU Yi, ZHANG Wei, YU Xi-rong, LI Lian-bo, ZHANG Xian-peng, LI Wei, XIA Chun-dong |
| Shandong Center for Disease Control and Prevention, Jinan 250014 China |
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Abstract Objective To formulate the level of reference dose from CT head scanning in Shandong Province for promoting its rationalization. Methods The results of doses are divided into 30 groups through measuring the CT dose index,the mean value for each group is chosen,and then the doses are ranked from low to high order,its value of 75% percentile is the reference dose level. Results Dose values of 75% percentile in two surveys,are 38.37mGy and 51.77mGy respectively. the absolute difference is 13.4mGy,and its value of the second survey has exceeded the value of 50mGy from protection standard, but less than the value of 60mGy given by ICRP. Conclusion With a large number of CT application,it is necessary to amend for new reference dose level,and it has obvious social benefits for establishing the reference dose level from CT Scanning.
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Received: 26 March 2015
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