Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are within normal limits . No CHF , focal infiltrate , effusion , or pneumothorax is detected . Bony structures are grossly unremarkable .
    OUTPUT:
    
No acute pulmonary process identified . No widening or displacement of the thoracic aorta is detected .