Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly . The mediastinal and hilar contours are within normal limits . The lungs are hyperinflated and there are diffuse interstitial opacities which appear unchanged from prior examination and are likely related to chronic lung disease . Note is made of scarring in the right middle lobe . No confluent opacity is identified to suggest pneumonia or aspiration . No definite rib fracture . Incompletely imaged right shoulder demonstrates a portion of surgical hardware .
    OUTPUT:
    
No definite rib fracture . No pneumothorax .