Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Mediastinal hilar contours are unremarkable . Pulmonary vasculature is not engorged . Minimal retrocardiac patchy opacity is felt to reflect atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Mild to moderate multilevel degenerative changes are noted in the thoracic spine . Chronic deformity of the right scapula and acromioclavicular joint is again noted .
    OUTPUT:
    
Minimal retrocardiac patchy opacity , likely atelectasis .