Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size is mild to moderately enlarged but unchanged . The mediastinal and hilar contours are stable , with the thoracic aorta appearing mildly tortuous . Mild pulmonary edema appears relatively similar compared to the prior study . Subsegmental atelectasis is noted in both lung bases . Possible trace bilateral pleural effusions are present . There is no pneumothorax . Right PICC has been removed . Degenerative changes of the imaged thoracic spine and right acromioclavicular joint are noted .
    OUTPUT:
    
Mild pulmonary edema with trace bilateral pleural effusions . Bibasilar atelectasis .