Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overall , there has been interval improvement in the moderate pulmonary edema compared to the prior exam . There has also been interval improvement in the mild cardiomegaly . Small left pleural effusion is overall unchanged compared to the prior exam . Alignment of the sternal wires is stable . There is no evidence of a pneumothorax .
    OUTPUT:
    
Interval improvement in the moderate pulmonary edema compared to the prior exam .