Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are now clear besides relatively streaky right basilar opacity . There is no edema or effusion . Right basilar opacity is Moderate cardiac enlargement is slightly improved from prior . No acute osseous abnormalities . Old healed mid left clavicular fracture is again noted .
    OUTPUT:
    
Bibasilar opacity is most likely atelectasis noting that infection is not entirely excluded .