Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly with alveolar infiltrate in both lower lobes . However , this is decrease compared to the prior study which had more florid pulmonary edema at that point in time . There is mild pulmonary vascular redistribution . Sternal wires are seen . The PICC line is unchanged . There is a small left effusion .
    OUTPUT:
    
Persistent bilateral lower lobe infiltrates , slightly improved compared to prior