Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are hyperexpanded with mild flattening of the bilateral hemidiaphragms . There is no focal consolidation , effusion , or pneumothorax . Area of heterogeneous opacification at the medial right lung base is most consistent with a fat pad . Mediastinal and hilar contours are normal . Heart size is normal . Old right posterior rib fractures are seen .
    OUTPUT:
    
Hyperexpanded lungs without evidence of pneumonia .