Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of cardiac silhouette persists . Mediastinal contours are unchanged , and enlargement of the hila bilaterally is compatible with lymphadenopathy as seen on the prior CT . Mild perihilar haziness suggests mild pulmonary edema , slightly improved from prior . No focal consolidation , pleural effusion or pneumothorax is seen . There are multilevel degenerative changes in the thoracic spine with bridging anterior osteophytes .
    OUTPUT:
    
Mild pulmonary edema , slightly improved compared to the previous exam .