Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Patchy left basilar opacity may reflect atelectasis . No focal consolidation , pleural effusion or pneumothorax is detected . There are no acute osseous abnormality is visualized .
    OUTPUT:
    
Minimal left basilar patchy opacity , potentially atelectasis .