Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The hilar and mediastinal contours are unremarkable . The lungs are well expanded and clear . There is no evidence of pneumothorax or pleural effusion . The visualized osseous structures are unremarkable .
    OUTPUT:
    
No acute abnormalities identified to explain the patient 's persistent cough . No rib fractures identified .