Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of cardiac silhouette is present . The aorta is mildly tortuous with atherosclerotic calcifications at the knob . Pulmonary vasculature is not engorged . Lungs are hyperinflated with upper lobe predominant emphysematous changes noted . Elevation of the right hemidiaphragm is of unknown chronicity with right basilar opacity likely reflective of atelectasis . Infection can not be excluded . Patchy left basilar opacity may reflect atelectasis . No pneumothorax is detected . A trace right pleural effusion is likely present . No acute osseous abnormalities seen .
    OUTPUT:
    
Mild emphysema . Elevation of the right hemidiaphragm of unknown chronicity . Trace right pleural effusion with right basilar atelectasis , though infection is not excluded . Patchy left basilar atelectasis .