Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky bibasilar opacities are likely secondary to atelectasis . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . Median sternotomy is a mediastinal clips are again noted . No acute osseous abnormalities .
    OUTPUT:
    
Probable bibasilar atelectasis without definite evidence of infection .