Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . Mediastinal and hilar contours are unchanged . The pulmonary vasculature is not engorged . Low lung volumes are present with patchy opacities in the lung bases most likely reflective of atelectasis . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities identified . No displaced rib fractures are present .
    OUTPUT:
    
Patchy bibasilar airspace opacities most likely reflective of atelectasis in this setting of low lung volumes . No displaced fractures identified . If there is continued concern for a rib fracture , consider a dedicated rib series .