Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low . There are diffuse bilateral airspace opacities consistent with pulmonary edema , this is similar in appearance when compared to the prior study . Difficult to exclude superimposed infection . The cardiomediastinal contour is unchanged appearance . No pneumothorax seen . The visualized bony structures are unremarkable .
    OUTPUT:
    
Pulmonary edema , similar in appearance when compared to the prior study .