Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is top - normal in size . Mediastinal contour is normal . There is no pneumothorax or pleural effusion . There is no focal lung consolidation . Linear opacity at the right lung base , most compatible with atelectasis . Partially imaged aortic stent present in the upper abdomen .
    OUTPUT:
    
No evidence of pneumonia .