Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly , improved compared with ___ . There is upper zone redistribution and mild vascular blurring , also improved . There is atelectasis at the left lung base , but no definite infiltrate and no frank consolidation . Minimal blunting of left costophrenic angle , without gross effusion . The aorta is calcified mildly unfolded as before .
    OUTPUT:
    
Mild cardiomegaly and evidence of mild CHF . Both findings are improved compared with ___ .