Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Cardiac silhouette size remains mildly enlarged . Small to moderate sized hiatal hernia is redemonstrated . The aorta is calcified and tortuous . Elevation the right hemidiaphragm is chronic . Bilateral calcified pleural plaques are again demonstrated . Linear opacities at both lung bases likely reflect atelectasis . Pulmonary vascularity is not engorged . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Bibasilar atelectasis . Calcified pleural plaques bilaterally compatible with prior asbestos exposure . Chronic elevation of the right hemidiaphragm . Small to moderate sized hiatal hernia .