Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . The cardiac and mediastinal silhouettes are stable . Left base opacity is similar , likely representing combination of pleural effusion and atelectasis underlying consolidation difficult to exclude . Again seen slight interstitial prominence in the mid to lower lung fields bilaterally , left greater than right , may be chronic or due to mild edema or aspiration or infection .
    OUTPUT:
    
Similar appearance of the chest . Similar left base opacity with left pleural effusion and overlying atelectasis , underlying consolidation difficult to exclude .