Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The cardiac , mediastinal , and hilar contours are normal . The pulmonary vascularity is normal . There are streaky opacities in the lung bases , most likely reflective of atelectasis . No focal consolidation , pleural effusion , or pneumothorax is visualized . There are no acute osseous abnormalities .
    OUTPUT:
    
Normal contour of the mediastinum without evidence of widening . Streaky opacities in the lung bases likely reflect atelectasis .