Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is normal . Minimal patchy opacity is seen in the left lower lobe , likely atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormalities seen .
    OUTPUT:
    
Minimal patchy left lower lobe opacity , likely atelectasis .