Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky bibasilar opacities are noted , not significantly changed since prior . Superiorly , the lungs are clear . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Probable bibasilar atelectasis , similar to prior . No definite acute cardiopulmonary process .