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 . The aorta is moderately tortuous but unchanged and diffusely calcified . There is mild pulmonary vascular congestion . No pleural effusion or pneumothorax . Minimal atelectasis is also seen within the lung bases . There are multilevel moderate degenerative changes seen in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion . Mild bibasilar atelectasis .