Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slow but improved . Moderate - to - severe cardiomegaly persists . Blunting of the costophrenic angles , worse on the right , suggests persistent layering small pleural effusions . Pulmonary vascular congestion but no pulmonary edema .
    OUTPUT:
    
Slightly improved lung volumes ; otherwise no significant interval change . No pulmonary edema .