Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . There is a persistent moderate - sized loculated pleural effusion on the left with mid to lower lung opacities suggestive of associated atelectasis . There has been no significant change in this appearance . The right lung remains clear . There is no pleural effusion on the right .
    OUTPUT:
    
Stable chest findings .