Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is normal . No focal consolidation , pleural effusion or pneumothorax is identified . 8 mm nodular opacity projecting over the right lung base may reflect a nipple shadow . Mild degenerative changes are seen in the lower thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . 8 mm nodular opacity projecting over the right lung base may reflect a nipple shadow . Repeat PA view with nipple markers is recommended .