Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright frontal chest radiograph demonstrates a marked interval increase in bibasilar air space opacities and probable small pleural effusions . The pulmonary vasculature remains normal . The cardiac silhouette is normal in size , and is unchanged . The mediastinal contours are notable only for calcification of the aortic knob . A left chest two - lead cardiac pacemaker is in stable and standard configuration . There is marked gaseous distention of the stomach .
    OUTPUT:
    
1 . Interval increase in bibasilar opacities . Considerations include developing pulmonary edema , although the pulmonary vasculature appears normal and the heart size is unchanged , making this an atypical appearance for edema . Alternatively , developing infection may give this appearance although this does n't fit with the clinical presentation as it would be expected that the patient would be very ill if pneumonia were this widespread . 2 . Gaseous distention of the stomach can put the patient at risk for aspiration , and decompression of this is recommended . These findings were discussed with Dr . ___ at 10 : 15 a .m . by phone .