Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacer device is noted with leads terminating in unchanged positions in the right atrium and right ventricle . Cardiac silhouette size remains mildly enlarged . The aorta is tortuous . Mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is not engorged . Minimal patchy opacities seen in the right lower lobe , likely atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
Minimal atelectasis in the right lower lobe .