Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a diffuse lung process go within alveolar component and Most of this is likely due to pulmonary edema superimposed on emphysema , however diffuse infection can not be excluded . There is more dense infiltrate / volume loss in the left lower lobe as described on the recent CT . The positions of the lines and tubes are unchanged
    OUTPUT:
    
Increased pulmonary edema . A superimposed diffuse infection ca n't be totally excluded .