Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is mild cardiomegaly . The hilar and mediastinal contour is unremarkable . Again noted are left perihilar and bibasilar opacities , overall unchanged compared to the prior exam . There are small bilateral pleural effusions . There is no pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Stable left perihilar and bibasilar alveolar opacities concerning for moderate bilateral pulmonary edema .