Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is persistent perihilar opacities consistent with heart failure . This appears to be mildly improved from ___ . There may be a small left pleural effusion , best appreciated on the lateral view . There is no pneumothorax . Cardiac silhouette is difficult to assess given the parenchymal abnormalities . Compression fracture of the lower thoracic spine is unchanged .
    OUTPUT:
    
Mild to moderate pulmonary edema .