Dear experts,

1.       From the FreeSufer wiki we all knows all of the processing and the generated files are in the Talairach (MNI305) coordinate. The FreeSurfer operates in a conformed space, which is different from the original structural image space that it has received as an input. If I want to use the generated surfaces or labels as masks (which is in Talairach space) for DTI probtrackx (which is need in diffusion space). How should I do?

2.        In your wiki I see the information as following:

  “Average Surface Construction

The average surface is constructed by computing the Talairach (MNI305) coordinate at each vertex for each subject (based on the talairach.xfm matrix for that subject). These coordinates are then mapped into the common surface space and averaged together so that the coordinate of a vertex in the common surface space is the average of the Talairach coordinates from the corresponding surface locations of the individuals. This results in the average surface overlaying nicely on the average (MNI305) volume. ”

Is the MNI305 in the MNI space? Can you tell me the meaning of the MNI305 in “Talairach (MNI305) coordinate”?

After the average surface overlaying nicely on the average (MNI305) volume. Is the average surface in the MNI space or in the Talairach space / common surface space?

Best wishes

Ling Zhao

Center for the Study of Applied Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, School of Psychology, South China Normal University, Guangzhou 510631, P. R. China