1Naidich D, Marshall C, Gribbin C, et al. Low - dose CT of the lungs: preliminary observations. Radiology, 1990; 175 (3): 729～731.
2Prasad SR, Wittram C, Shepard JA, et al. Standard - dose and 50 % - reduced - dose chest CT: comparing the effect on image quality. AJR, 2002; 179(2) :461～465.
3Brener DJ, Elliston CD, Hall EJ, et al. Estimated risks of radiation- induced fatal cancer from pediatric CT. AJR, 2001;176: 289～ 296.
4Rusinek H, Naidich D, Mc Guinness G, et al. Pulmonary nodule detection: low dose versus conventional CT. Radiology,1998;209(1) :243～249.
5Ambrosino MM, Genieser NB, Roche KJ, et al. Feasibility of high-resolution, low-dose chest CT in evaluation the pediatric chest. Pediatr Radiol, 1994; 24: 6～10.
6Jayier L, Joaquim P, Pilar G, et al. Low- dose high- resolution CT of the chest in children and young adults: dose cooperation, artifact incidence, and image quality. AJR, 2000; 175:985～ 992.
7Rogolla P, Stover B, Scheer I, et al. Low- dose spiral CT:applicability to paediatric chest imaging. Pediatr Radiol,1999;29(8) :565～569.
8Polacin A, Kalender WA, Marchal G. Evaluation of section sensitivity profiles and image noise in spiral CT. Radiology,1992; 185(1) :29～35.
9Inskip PD,Ekbon A,Galanti MR,et al.Medical diangnostic X-ray and thyroid cancer.J Natl Cancer Inst,1995,87:1613-1621.
10Nitta N, Takahashi M, Murata K, et al . Ultra low-dose helical CT of the chest .AJR, 1998, 171: 383-385.
