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 normal . The aorta is mildly tortuous and demonstrates diffuse mild mural calcifications . The pulmonary vascularity is not engorged . Hilar contours are unchanged . There are minimal linear streaky opacities in the lung bases likely reflective of atelectasis . No pleural effusion or pneumothorax is seen . Evaluation of the lung apices is somewhat limited due to obscuration from the patient 's chin . There are no acute osseous abnormalities .
    OUTPUT:
    
Minimal bibasilar atelectasis .