Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior , the degree of pulmonary edema appears worse although this may be accounted for by differences in technique . There is persistent small bilateral pleural effusions . And moderate cardiomegaly .
    OUTPUT:
    
Moderate pulmonary edema , not definitely changed since prior with persistent bilateral effusions and cardiomegaly . Superimposed infection can not be excluded .