Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , there has been some interval partial clearing of the alveolar infiltrate ; however , there continues to be moderate cardiomegaly , pulmonary vascular redistribution , perihilar haze , and dense retrocardiac opacity . The ET tube , pacemaker , right IJ line , and NG tube are unchanged .
    OUTPUT:
    
Slight improvement in pulmonary edema .