Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The degree of the right pneumothorax has decreased since the ___ at 16 : 14 . The right chest tube is not seen . The lungs are otherwise clear , and the cardiomediastinal contours are stable .
    OUTPUT:
    
Interval decrease in size of right pneumothorax as compared to 414 pm and ___ . Continued nonvisualization of right chest tube .