Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been some interval minor improvement in the amount of pulmonary edema . There small effusions bilaterally left greater than right but both are smaller than on the prior exam . There is some mild pulmonary vascular redistribution . The heart size continues to be large . Sternal wires are unchanged . There is no focal infiltrate . There is some streaky volume loss at the bases .
    OUTPUT:
    
Slight improvement in pulmonary edema .