Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: the patient is status post right - sided pigtail drain placement . The right pleural effusion has significantly decreased in size . No pneumothorax is present . Cardiac size is again top normal . Aorta is tortuous . Left lung is essentially clear .
    OUTPUT:
    
Significant decrease in the size of the right - sided pleural effusion status post pleural catheter placement without evidence of pneumothorax .