Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ , 05 :26 , the pre-existing parenchymal and interstitial opacities have further decreased . Borderline size of the cardiac silhouette persists . Small bilateral pleural effusions . Unchanged postoperative left apical changes . The right and left central venous access lines are in constant position .
    OUTPUT:
    
Findings suggestive of improving pulmonary edema , superimposed upon multifocal pneumonia .