Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is mild left basilar atelectasis . There is no definite sign of pneumonia or CHF . No pleural effusion or pneumothorax is seen . The heart is upper limits of normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Mild left basilar atelectasis . Normal heart size . Otherwise normal .