Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior study , there has been interval overall improvement in bilateral pulmonary edema . There may also be a tiny left pleural effusion . The previously demonstrated massive cardiomegaly , emphysematous changes , and splenic pseudocysts are all unchanged since the prior study . Position of pacemaker and defibrillator leads are unchanged since the prior study . Median sternotomy wires and prosthetic mitral and tricuspid valves are also stable in position since the prior study .
    OUTPUT:
    
Interval overall improvement in pulmonary edema . Otherwise , no change since the prior study .