6Kim MJ, Park CH, Choi SJ, et al. Muhidetector computed tomography chest examinations with low-kilovohage protocols in adults: effect on image quality and radiation dose. J Comput Assist Tomogr,2009 ,33 :416-421.
7Nitta N, Takahashi H, Murata K, et al. Ultra low dose helical CT of the chest: evaluation in clinical cases. Radiat Med, 1999, 17: 1-7.
8Lopes Pegna A, Picozzi G. Lung cancer screening update. Curr Opin Pulm Med,2009, 15:327-333.
9Plurad D, Green D, Demetriades D, et al. The increasing use of chest computed tomography for trauma: is it being overutilized? J Trauma,2007,62:631-635.
10Hatayama O, Kobayashi T, Fujimoto K, et al. Utility of single- slice high-resolution CT in upper lung field combined with low- dose spiral CT for lung-cancer screening in the detection of emphysema. Intern Ned ,2007,46 : 1519-1525.