Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Following pigtail catheter placement in the right lower chest , moderate right pleural effusion has near completely resolved . Moderate - to - large left pleural effusion associated with left lower lung atelectasis and mediastinal shift to the right side is unchanged . There is no pneumothorax . Obscured left mediastinal and the heart borders by pleural effusion limited assessment of the cardiomediastinal silhouette .
    OUTPUT:
    
Folowing right pigtail catheter placement , moderate right pleural effusion has near completely resolved , whereas large left pleural effusion associated with passive collapse of adjacent lung and mediastinal shift to the right side is persisting . No pneumothorax .