Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . The lung volumes are extremely low , with mild asymmetric elevation of the right hemidiaphragm . Opacity in the right lung base , likely represents atelectasis . No pneumothorax is seen . A small right pleural effusion is likely present . If there is concern for rib fracture , dedicated rib series can be performed with a marker placed at the site of maximum tenderness .
    OUTPUT:
    
Right basilar opacity is likely a combination of atelectasis / consolidation and effusion , but PA and lateral CXR may be helpful for more complete assessment when the patient 's condition permits .