Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . The right internal jugular central venous catheter remains present , the tip projecting over the distal SVC . Bilateral perihilar and lower lung zone patchy airspace opacities . Relatively unchanged left pleural effusion . No pneumothorax identified . The size of the cardiomediastinal silhouette is enlarged but unchanged .
    OUTPUT:
    
Pulmonary edema as well as a relatively unchanged left pleural effusion .