Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the prior radiograph performed yesterday morning , there has been slight interval improvement in extent of interstitial pulmonary edema . There are no large pleural effusions . There is no pneumothorax . Persistent moderate cardiomegaly . Median sternotomy wires are intact . Left pectoral pacemaker is unchanged in visualized .
    OUTPUT:
    
Slight interval improvement in interstitial pulmonary edema .