Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post right upper lobectomy with evidence of volume loss in the right lung and mild rightward shift of mediastinal structures . Heart size is normal with a coronary artery stent again noted . Dense atherosclerotic calcifications of the thoracic aorta are re - demonstrated . Lungs are hyperinflated with severe emphysema again noted . Small right pleural effusion is new in the interval with associated right basilar opacity , potentially atelectasis . No definite left pleural effusion or pneumothorax is seen . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
Interval development of small right pleural effusion with right basilar opacity , likely atelectasis . Severe emphysema .