Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest are provided . The lungs appear clear aside from mild left basal atelectasis . Heart size is upper limits of normal . No evidence of pneumonia or CHF . No large effusion or pneumothorax is seen . The bony structures are intact . The mediastinal contour is normal . No free air below the right hemidiaphragm .
    OUTPUT:
    
Top normal heart size , left basal atelectasis . Otherwise unremarkable .