Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe enlargement of the cardiac silhouette is relatively unchanged compared to the prior exam . There is calcification and tortuosity of the thoracic aorta which is stable . Perihilar haziness with vascular indistinctness is compatible with mild pulmonary edema , slightly improved compared to the prior exam . More focal opacities within the lung bases likely reflect atelectasis . Previously noted small bilateral pleural effusions appear to have improved . No pneumothorax is detected . Remote left - sided rib fracture is present .
    OUTPUT:
    
Mild pulmonary edema , slightly improved from the prior exam . Interval decrease in size of previously noted small bilateral pleural effusions . Bibasilar atelectasis .