Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , interval placement of a right - sided pigtail catheter , with significant improvement in the degree of pulmonary edema , as well as in the size of the right pleural effusion . There is persistent retrocardiac volume loss and pleural fluid . Re mediastinal silhouette is otherwise unchanged .
    OUTPUT:
    
Interval right - sided pigtail catheter placement with significant decrease in the right pleural effusion and degree of pulmonary edema .