Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which is borderline enlarged . The mediastinal and hilar contours are unremarkable . There is crowding of the bronchovascular structures , but no overt pulmonary edema is demonstrated . Minimal streaky opacities are seen in the lung bases likely reflective of atelectasis . No large pleural effusion , focal consolidation or pneumothorax is present . Mild to moderate multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .