Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky bibasilar opacities , left greater than right are likely atelectasis . Superiorly , lungs are clear . Cardiomediastinal silhouette is within normal limits . Moderate amount of free intraperitoneal air is noted below the diaphragm .
    OUTPUT:
    
Free intraperitoneal air .