Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior , there has been no significant interval change . Bibasilar opacities could be atelectasis noting that infection is not excluded . Lungs are otherwise clear . Right hilar fullness is again noted . Cardiac silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Bibasilar opacities likely atelectasis , infection not excluded . Overall , findings are similar compared to prior . Right hilar fullness as previously noted and CT is suggested on a nonurgent basis if no prior available to document stability .