Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are linear bibasilar opacities with blunting of the costophrenic angles . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormality is identified .
    OUTPUT:
    
Bibasilar opacities likely due to atelectasis with possible component of small effusions .