Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the study from the prior evening , there continues to be a large right effusion ; however , the aeration in the right lung is slightly improved . There continues to be a moderate left effusion with pulmonary vascular redistribution and some patchy areas of alveolar infiltrate but this is also slightly improved . There continues to be marked cardiomegaly . The position of the lines and tubes are unchanged .
    OUTPUT:
    
CHF . Slightly improved .