Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar and mediastinal contours are within normal limits . There is no pneumothorax or pleural effusion . Linear bibasilar densities , worst at the left base , likely denote moderate atelectasis , although an underlying small consolidation can not be excluded . Multiple right sided rib fractures are unchanged .
    OUTPUT:
    
Linear bibasilar opacities likely reflecting moderate atelectasis . Small underlying consolidation can not be excluded .