7Nickoloff EL,Alderson PO.Radiation exposures to patients form CT:reality,public perception and policy[J].AJR,2001,177:285-287.
8Kaira MK,Maher MM,Toth TL,et al.Strategies for CT radiation dose optimization[J].Radiology,2004,230:619-628.
9Goddard CC,al-Farsi A.Radiation doses from CT in the sultanate of oman[J].Bir J Radiol,1999,72:1073-1077.
10Diederich S,Lenzen H.Radiation exposure associated with imaging of the chest comparison of different radiographic and computed tomography techniques[J].Cancer,2000,89:2457-2460.
