Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The cardiac silhouette size appears unchanged , mildly enlarged . The mediastinal and hilar contours are stable . The pulmonary vascularity is normal . Small bilateral pleural effusions have decreased in size compared to the prior exam . Minimal streaky opacity in the left lung base is compatible with atelectasis . There is no focal consolidation . No pneumothorax is identified . There are multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Small bilateral pleural effusions , decreased from the prior study , with minimal left basilar atelectasis .