1UNSCEAR.Sources and effects of ionizing radiation,Vol.I:Sources[R].New York:UN,2000.
2Hart D,Wall B F.Radiation Exposure of the UK Populationfrom Medical and Dental X-ray Examinations:NRPB-W4[R].Chilton,Didcot,UK:NRPB,2002.
3Sonawane AU,Shirva VK,Pradhan AS.Estimation of skinentrance doses(SEDs)for common medical X-ray diagnos-tic examinations in India and proposed diagnostic referencelevels(DRLs)[J].Radiat Prot Dosim,2010.138(2):129-36.
8Aminah M, Ng KH, Abdullah BJ. Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography [ J ]. Australas Phys Eng Sci Med, 2010, 33: 329-334.
9Yakabe M, Sakai S, Yabuuchi H, et al. Effect of dose reduction on the ability of digital mammography to detect simulated microcalcifications [ J ]. J Digit Imaging, 2010, 23 ( 5 ) : 520-526.
