Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The mediastinal and hilar contours unchanged , with similar prominence of the hila bilaterally . Lungs are hyperinflated with emphysematous changes again noted . No pulmonary vascular engorgement is present . Patchy opacities in the right lung base may reflect atelectasis . No pleural effusion or pneumothorax is seen . No acute osseous abnormalities detected .
    OUTPUT:
    
Emphysema . Patchy right basilar opacity may reflect atelectasis .