Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tracheostomy tube is in place . There is mild improvement in diffuse moderate - to - severe pulmonary edema and vascular congestion from the most recent prior study . A moderate right pleural effusion is unchanged . Retrocardiac opacification and opacification at the right lung base is most likely reflective of underlying atelectasis . No pneumothorax is detected . The cardiomediastinal silhouette is prominent but unchanged .
    OUTPUT:
    
Mildly improved but persistent moderate - to - severe pulmonary edema and moderate right pleural effusion .