Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is within normal limits . Mediastinal and hilar contours are unremarkable . The pulmonary vascularity is not engorged . No focal consolidation , pleural effusion or pneumothorax is seen . Mild atelectasis within the right lung base is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild right basilar atelectasis .