I try to use DSI model to do tractography. However, it seems that MRtrix3 does provide this method, so I turn to use DSI studio software to get the fiber track. And the output of DSI studio is in .trk format. Then I use the code provided by Marc Côté on Github to convert .trk to .tck. But the position of the fiber is wrong which is shown in figure below. Could you please give me any advice?