Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left PICC line terminates in the upper SVC . Diffuse bilateral parenchymal opacities have decreased , but are still moderate to severe . The left heart border is better delineated , and there is decreased hilar haze . Cardiomegaly is slightly improved . There is no evidence of pneumothorax .
    OUTPUT:
    
Interval improvement in pulmonary edema , however the pulmonary edema is still moderate to severe .