Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to multiple prior exams dating back to ___ with most recent from ___ . There are bibasilar opacities suggestive of atelectasis vs scar given persistence over time . There are trace bilateral effusions , slightly smaller when compared to previous exam . There is no new confluent consolidation . There is no evidence of overt failure . Cardiac silhouette is enlarged but stable in configuration . Osseous structures are unchanged .
    OUTPUT:
    
Bibasilar opacities most suggestive of atelectasis versus scarring given persistence over time . Trace bilateral pleural effusions , no evidence of acute cardiopulmonary process .