Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear bibasilar opacities are suggestive of atelectasis especially in setting of low lung volumes . The lungs are otherwise clear without effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits . Prominent air - filled loops of colon are noted with multiple air - fluid levels identified . There are no dilated air-filled loops of small bowel or free intraperitoneal air .
    OUTPUT:
    
No free intraperitoneal air . Multiple air - fluid levels seen in the colon for which clinical correlation suggested