Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . There is minimal hazy opacity within the right lung base , without focal consolidation . No pleural effusion or pneumothorax is present . Pulmonary vascularity is normal . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Minimal hazy opacity in the right lung base , which likely reflects atelectasis .