Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . There is minimal bibasilar atelectasis . Heart size is normal . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . The aorta and brachiocephalic vessels are tortuous . There are surgical clips in the right upper quadrant .
    OUTPUT:
    
Mild bibasilar atelectasis . No evidence of pneumonia .