Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are again noted . Bibasilar opacities which are more conspicuous on the frontal view which demonstrates the lower lung volumes . These are likely atelectasis . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Bibasilar opacities which are most likely due to atelectasis in the setting of low lung volumes . No definite evidence of infarction .