Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size remains top normal . The aorta is moderately tortuous but unchanged . The pulmonary arteries remain enlarged , suggestive of pulmonary arterial hypertension . There is minimal atelectasis in the lung bases . Blunting of the costophrenic angles posteriorly on the lateral view may be due to chronic pleural thickening . The lungs are hyperinflated compatible with COPD . No pneumothorax or large pleural effusion is otherwise demonstrated . There are mild multilevel degenerative changes in the thoracic spine with slight loss of height of several mid and lower vertebral bodies .
    OUTPUT:
    
Bibasilar atelectasis . COPD . No pneumothorax .