5[5]Kelcz F,Zink F E,Walter W,et al.Conventional chest radiogroph vsd ualenergy.Computed radiography in the detection and characterization of pulmonary nodule[J].A JR,1994,162 (2):271-278.
6Sagel SS,Jost RG,Glazer HS,et al.Digital mobile radiograph.Thorac Imaging,1990,5(12):36-48.