5Shrimpton PC, Hart D, Hillier MC, et al. Aspects of examination frequency and assurance. In: Survey of CT practice in the UK, NRPB-R248. Chilton : NRPB, 1991. Part 1.
6Greess H, Nomayr A, Wolf H, et al. Dose reduction in CT examination of children by an attenuation - based on - line modulation of tube current(CASE Dose). Eur Radiol, 2002, 12(6) :1571- 1576.
7Karabulut N, Toru M, Gelebek V, et al. Comparison of low-dose and standard-dose helical CT in the evalution of pulmonary nodules. Eur Radiol, 2002, 12(11) : 2764- 2769.
8Diederich S, Lenzen H, Windmann W, et al. Pulmonary nodules : experimental and clinical studies at low-dose CT. Radiology, 1999, 213(1) :289 - 298.
9Nitta N, Takahashi M, Murata K, et al. Ultra loe-dose helical CT of the chest. AJR, 1998, 171(2) : 383 - 385.
10Rusinek H, Naidich D, McGuinness G, et al. Pulmonary nodule detection: low-dose versus conventional CT. Radiology, 1998,209(1) :243 - 249.