Thanks for your help! I have solved the problem! And I still have one question to ask:
By using your MRtrix3 software, I have made a whole brain tractography from the dentate nucleus of cerebellum, and I can see the tracking image. I would like to know how to obtain the information of this image, and whether a numerical matrix can be obtained from the information of the image? Because I want to segment the dentate nucleus according to the fiber bundle from the dentate nucleus, I want to extract the favorable data information from a file with the suffix .tck, thank you!
Thanks for your help again and I am looking forward to receive your reply!