Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal contours are within normal limits . Lung volumes are slightly low , and note is made of development of linear foci of atelectasis in the left perihilar and both basilar regions . Small pleural effusions are present bilaterally , and extensive free intraperitoneal air is present below the diaphragms , in keeping with history of recent abdominal surgery . Epidural catheter is also demonstrated .
    OUTPUT:
    
1 . Multifocal linear atelectasis and small pleural effusions . 2 . Free intraperitoneal air , in keeping with recent abdominal surgery .