Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Pulmonary vasculature is normal . No focal consolidation , pleural effusion or pneumothorax is seen . There is minimal patchy opacity in the lung bases . No acute osseous abnormalities detected .
    OUTPUT:
    
Minimal atelectasis in the lung bases .