Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest film ___ at 16 26 is submitted .
    OUTPUT:
    
There has been interval appearance of diffuse bilateral airspace process with associated peribronchial cuffing . These findings would favor moderate to severe pulmonary edema , although diffuse infectious process could also have this appearance . Clinical correlation is advised . The patient is status post median sternotomy with overall stable cardiac mediastinal contours given portable technique and lower lung volumes on the current examination . No pneumothorax is seen . No large effusions can be appreciated .