Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest film ___ at 05 :36 is submitted .
    OUTPUT:
    
Endotracheal tube has its tip approximately 5 cm above the carina . A nasogastric tube is seen coursing below the diaphragm with the tip projecting over the stomach . There has been interval appearance of bibasilar patchy airspace disease as well as a layering left effusion . Findings most likely reflect atelectasis given the relatively rapid interval change , although pneumonia should also be considered . No pneumothorax . No pulmonary edema . Overall cardiac and mediastinal contours are stable given differences in patient positioning .