Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right chest tube is unchanged as compared to prior chest CT , with side - port within the right lower thoracic cage . Median sternotomy wires are intact . Tracheostomy tube is unchanged in position , terminating 5 cm above the carina . A small to moderate sized right pleural effusion is again noted . Peribronchial cuffing and diffuse airspace opacities are consistent with persistent pulmonary edema . A calcified right hilar lymph node is again noted . The mediastinal silhouette is stable .
    OUTPUT:
    
Persistent pulmonary edema with patchy airspace opacities , superimposed infection can not be excluded .