Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low accentuating the cardiomediastinal silhouette and bronchovascular structures . Opacities at both lung bases are likely related to atelectasis . Lungs are otherwise clear . No new focal consolidation identified . In the setting of extremely low lung volumes , however , it is difficult to assess the cardiovascular status . There is no pneumothorax . There is a slightly displaced fracture of the anterior left second rib , with a slightly sclerotic border suggesting subacute etiology .
    OUTPUT:
    
Bibasilar atelectasis . No new focal consolidation .