Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy . Mild cardiomegaly is unchanged . The thoracic aorta is densely calcified . Mediastinal contour is unchanged . There is mild pulmonary vascular congestion with patchy opacities in the lung bases which may reflect atelectasis . Tiny bilateral pleural effusion are likely present . No pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild pulmonary vascular congestion with mild bibasilar atelectasis and small bilateral pleural effusions .