Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart is mildly enlarged and there is a suggestion of mitral annular calcifications . The aorta is tortuous and diffusely calcified . The pulmonary vascularity and hilar contours are normal . No focal consolidation , pleural effusion or pneumothorax is present . There is minimal patchy opacities in the lung bases likely reflective of atelectasis . No acute osseous abnormality is identified .
    OUTPUT:
    
Minimal bibasilar atelectasis .