5Nakata H , Kimoto T , Nakayama T, et al. Diffuse peripheral Lung disease: evaluation by high resolution computed tomography[J]. Radiology, 1985, 157(2):181 - 185.
6Wiggins J , Steickland B, Turner WM . Combined crytogenic fibrosing alveolitis and emphysema : the value of high resolution computed tomography in assessment[J]. Respir Medicine, 1990, 84(5): 365-369.
7Crytal RG, Fulmer JD, Roberts WC , et al . Idiopathic pulmonary fibrosis :clinical, histologic, radiographic, physiologic, scintigraphic, cytologic and biochemicaaspects[J]. Ann Intern Med, 1976, 85: 769-788.
8Hammond EC , Auerbauch O, Kiman D, et al. Effects of cigarette smoking on dogs. Design of experiment, mortality, and findings in lung parenchyma[J]. Arch Environ Health , 1970 ; 21 : 740 - 753.
9Auerbauch O , Garfinkei L, Hammond, EC , Relation of smoking and age to findings lung parachyma : a microscopic study[J ] . chest, 1974, 65:29 - 35.
10Saider GL, Boston MA, Kleinerman J, et al. The definition of emphysema. Report of a national heart,lung and blood institure. Division of lung disease workshop[J]. Am Rev Pespir Dis,1985,132:182-185.