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1资料与方法1.1资料2010年湖北省内14家综合性医院14台CT防护性能。1.2方法利用NERO TM8000剂量仪和Catphan 500检测模体按照GB/T17589-1998标准进行检测〔2〕,检测仪器经过检测校验合格。检测条件均为120KV,分≤300mAs(100-300mAs)、>300mAs(301-700 mAs)两组分别与加权剂量指数、高对比分辨力和低对比分辨力做T检验。
1 Materials and Methods 1.1 Materials 2010 14 hospitals in Hubei Province 14 CT protection performance. 1.2 Methods The use of NERO TM8000 dosimeter and Catphan 500 detection module in accordance with GB / T17589-1998 standard test [2], testing equipment after testing and verification. Test conditions were 120KV, points ≤ 300mAs (100-300mAs),> 300mAs (301-700mAs), respectively, the two groups were compared with the weighted dose index, high contrast and low contrast resolution to do T test.