Topics: SOLITARY PULMONARY NODULE, MULTIPLE PULMONARY NODULES, LUNG MASSES, CAVITARY LESIONS, HYPERLUCENT LUNG, CYSTS, CYSTIC-APPEARING LESIONS, DIFFUSE INTERSTITIAL DISEASE, DIFFUSE AIRSPACE DISEASE, FOCAL AIRSPACE HOMOGENEOUS OPACITIES, FOCAL AIRSPACE NONHOMOGENEOUS OPACITIES, PLEURAL DISEASE, PULMONARY VASCULAR DISEASE, MEDIASTINAL COMPARTMENTS, cardiac disease, PERICARDIAL DISEASE, SKELETAL DEFORMITIES, chest wall deformities, DIAPHRAGMATIC LESIONS, LUNG TRANSPLANT PATIENTS