Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large gastric air - fluid level is seen . No free air is detected . Linear bibasilar opacities reflect atelectasis . The heart size is top normal . The hilar and mediastinal contours are within normal limits . There is no pneumothorax , focal consolidation , or pleural effusion .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Air-fluid level within the stomach , better seen on the CT abdomen examination performed on the same day .