Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ , right - sided pigtail catheter has been removed . Bilateral small to moderate pleural effusions have not significant changed . Bibasal atelectasis has not significantly changed . Mild cardiomegaly . The upper lungs are clear . No pneumothorax .
    OUTPUT:
    
No significant change in right moderate pleural effusion post pigtail catheter removal . No pneumothorax .