Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size remains moderately enlarged . The aorta is tortuous , with the mediastinal contours appearing unchanged . There is no pulmonary vascular congestion . Small bilateral pleural effusions are visualized , possibly slightly increased on the left compared to the prior exam . Bibasilar atelectasis is also re - demonstrated . There is no pneumothorax . No acute osseous abnormalities are visualized though there are multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Small bilateral pleural effusions with bibasilar atelectasis . The size of the pleural effusion on the left may be slightly increased compared to the prior exam .