Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are small unchanged bilateral pleural effusions and associated mild - to - moderate bibasilar atelectasis , slightly improved . A left - sided pleural catheter is unchanged in position , ending along the lateral aspect of the lower pleural space . There is no definite pneumothorax . The cardiac and mediastinal contours are unchanged , allowing for differences in lung volumes .
    OUTPUT:
    
1 . Unchanged positioning of the left - sided pleural catheter . 2 . Small bilateral pleural effusions and decreased bibasilar atelectasis .