Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Cardiac silhouette size is top normal , unchanged . Mediastinal contours are similar . There is mild pulmonary edema , with a trace left pleural effusion . Elevation of the right hemidiaphragm is chronic . There is no focal consolidation or pneumothorax . Mild levoscoliosis of the thoracolumbar spine is again seen .
    OUTPUT:
    
Mild pulmonary edema and trace left pleural effusion .