Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post aortic valve replacement . The right IJ catheter is unchanged in positioning . There has been interval placement of a right chest tube , however it is unclear from this radiograph if this tube is actually in the pleural space . A continues to be a large loculated right pleural effusion , which has decreased in size compared to the prior radiograph . The left lung continues to be essentially clear . The cardiomediastinal silhouette is stable . There is no definite pneumothorax . Surgical fixation hardware is unchanged .
    OUTPUT:
    
Interval placement of a right chest tube , which appears more inferior than typically expected . There has been interval decrease of the large right pleural effusion , however based on this radiograph , it is not certain if this catheter is actually within the pleural space .