Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs remain relatively hyperinflated . There is persistent blunting of the right costophrenic angle worrisome for trace pleural effusion . No new focal consolidation is seen . The patient is status post median sternotomy and CABG . Cardiac and mediastinal silhouettes are stable . No pulmonary edema is seen .
    OUTPUT:
    
Persistent slight blunting of the right costophrenic angle could be due to trace pleural effusion . No pulmonary edema .