Finally when I moved or copied to another segmentation, it worked out well. But I wonder whether it is the same as RTst which relates to the original image? And could you tell me how to extract the coordinate information of the contour? Thank you. 
Finally when I moved or copied to another segmentation, it worked out well. But I wonder whether it is the same as RTst which relates to the original image? And could you tell me how to extract the coordinate information of the contour? Thank you.