Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval placement of a right pigtail catheter with significant decrease in the size of the right pleural effusion . There is a persisting small right pleural effusion with overlying atelectasis . No pneumothorax identified . Minimal atelectasis at the left lung base . The size of the cardiac silhouette is enlarged but unchanged . A left chest wall power injectable Port - A - Cath is present .
    OUTPUT:
    
Interval placement of a right pigtail catheter with a significant decrease in size of the right pleural effusion . No pneumothorax identified .