Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . No focal consolidation , effusion , edema , or pneumothorax . The heart is normal in size . The mediastinum is not widened . The descending thoracic aorta is slightly tortuous . The hilar grossly unremarkable . A 4 - mm right lower lobe opacity is a calcified granuloma or vessel - on - end . No obvious pulmonary mass . Multilevel degenerative changes , particularly in the lower thoracic spine , are moderate . Bowel gas pattern the partially visualized upper abdomen is nonspecific . No subdiaphragmatic free air .
    OUTPUT:
    
No pulmonary effusion . No obvious focal pulmonary mass .