Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Bibasilar opacities are more conspicuous on the current exam . Superiorly , the lungs are clear . Probable small bilateral effusions , noting that the posterior costophrenic angles are not clearly delineated . The cardiomediastinal silhouette is within normal limits . Degenerative changes seen at the shoulders bilaterally .
    OUTPUT:
    
Bibasilar opacities , potentially due to any combination of atelectasis , aspiration or potentially scarring given persistence . Probable small bilateral effusions .