Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left port -a-cath terminates in the superior cavoatrial junction , near the upper right atrium . Since the prior study performed 1 day earlier , there has been substantial improvement in underlying pulmonary edema . No new consolidation in the aerated portions of the lungs . Right pleural effusion has also decreased , with a slightly loculated appearance . Left pleural effusion is small . No pneumothorax . There may be minimal bi-apical scarring . Heart remains enlarged .
    OUTPUT:
    
Improving pulmonary edema and right pleural effusion since 1 day earlier .