Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest film ___ at 17 : 29 is submitted .
    OUTPUT:
    
Interval appearance of layering bilateral effusions with bibasilar airspace opacities most likely representing compressive atelectasis , although aspiration or pneumonia can not be excluded . Interval appearance of mild pulmonary edema . Heart remains stably enlarged which may reflect cardiomegaly , although pericardial effusion should also be considered . Clips in the right superior mediastinum are likely related to prior thyroid surgery . Surgical clips are also again seen in the left upper quadrant .