Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased pulmonary vascularity , mildly improved since prior exam . There is small right pleural effusion and / or thickening , improved since prior . Improved right basilar opacity . Mild infrahilar interstitial prominence , may represent edema , improved . Borderline heart size , improved since prior . No pneumothorax .
    OUTPUT:
    
Mild improvement since prior .