Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest film ___ at 12 :08 is submitted .
    OUTPUT:
    
Lung volumes remain low with layering bilateral effusions and bibasilar airspace opacities which are not significantly changed and may reflect compressive atelectasis , although pneumonia can not be excluded . Left apical linear opacity likely reflects subsegmental atelectasis . No evidence of pulmonary edema . No pneumothorax . Overall cardiac and mediastinal contours are likely stable .