Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior , there has been no significant interval change . Streaky bibasilar opacities persist . Superiorly , the lungs are clear . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Persistent bibasilar opacities which could represent atelectasis although superimposed infection or aspiration are entirely possible .