Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are very low which causes crowding of the bronchovascular structures . Bibasilar opacities could represent aspiration or infection . There is no pleural effusion or pneumothorax . The cardiac and mediastinal contours are normal .
    OUTPUT:
    
Bibasilar opacities could represent aspiration or infection .