Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low . Pulmonary edema has improved since the prior study , now mild . The amount of mediastinal engorgement has also decreased . The cardiac silhouette is top normal . There is no pleural effusion or pneumothorax . Calcifications of the aortic arch are unchanged . Chronic right pleural thickening is again noted .
    OUTPUT:
    
Interval improvement in pulmonary edema , now mild .