Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph demonstrates interval placement of a right chest pigtail catheter , with decreased medial right loculated pleural fluid . Right lung opacities are largely unchanged , although there may be slightly improved aeration of the right upper lobe . There is no pneumothorax . The remainder of the exam is unchanged .
    OUTPUT:
    
Interval placement of a right chest pigtail catheter , with decreased loculated medial right pleural fluid and slightly improved aeration of the right upper lobe . No pneumothorax .