Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Right basilar opacification is concerning for infection or aspiration . Minimal streaky left basilar opacity is nonspecific , but also may reflect an additional site of infection or aspiration . No pneumothorax or pleural effusion is identified . Remote left - sided rib fracture is present .
    OUTPUT:
    
Ill - defined bibasilar airspace opacities , more pronounced in the right lung base , concerning for infection or aspiration .