Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate moderate bilateral pleural effusions , right greater than left , with associated atelectasis . Markedly improved but persistent mild pulmonary edema . Mild cardiomegaly , stable . The mediastinum is widened but unchanged since ___ . A right - sided central line is seen terminating in the low superior vena cava . No pneumothorax .
    OUTPUT:
    
Markedly improved but persistent mild pulmonary edema . Stable cardiomediastinal silhouette .