Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest demonstrates clear lungs . Mild left basilar atelectasis with no pleural effusion or pneumothorax . The cardiac , hilar , and mediastinal contours are normal . Tracheal air column is uninterrupted .
    OUTPUT:
    
Mild left basilar atelectasis with otherwise clear lungs .