Tim Coalson can explain how to dedrift MNI space (which as Mike says is no longer true MNI space).
Peace, Matt. On 7/2/18, 10:10 AM, "[email protected] on behalf of Harms, Michael" <[email protected] on behalf of [email protected]> wrote: > >Hi, >Re (1): >If you want to work with streamlines in MNI space then you have to accept >the "drift" (volume expansion) that is part of MNI space itself. > >Re (2): >Maps may be resampled to surfaces in MNI space. But all the FreeSurfer >structural quantities that we provide in the database/spreadsheet in >ConnectomeDB are measured in the subject's real (native) space. > >Cheers, >-MH > >-- >Michael Harms, Ph.D. > >----------------------------------------------------------- > >Associate Professor of Psychiatry > >Washington University School of Medicine > >Department of Psychiatry, Box 8134 > >660 South Euclid Ave. Tel: 314-747-6173 > >St. Louis, MO 63110 Email: [email protected] >On 7/2/18, 7:14 AM, "[email protected] on behalf of >Claude Bajada" <[email protected] on behalf of >[email protected]> wrote: > >Dear experts, > >I have a few questions: > >1) I am currently working on a project using tractography and the HCP >data. I have used the HCP provided FNIRT based MNI registration in order >to register individual streamlines from "native" or diffusion space (as >per post HCP minimal processing pipeline) to MNI space. However, in >Glasser 2016 supplementary text, it states that the MNI space is drifted >relative to the mean brain size of individual brains (greatest along the >x and z axes). I've been told that it is possible to "dedrift" these >data and I wonder if anyone has experience in doing this and is able to >point me in the right direction. > >2) from what I understand, structural qualities such as cortical >thickness etc are measured in the individual's real space. However then, >what I do not understand is the file structure of the HCP data. The >structural measures such as cortical thickness, curvature and myelin >maps etc live in the MNINonLinear/fsaverage_LR32k rather than in the >'native space' directory. Can anyone shed light on this? > >Regards, > >Claude > > > >-------------------------------------------------------------------------- >---------------------- >-------------------------------------------------------------------------- >---------------------- >Forschungszentrum Juelich GmbH >52425 Juelich >Sitz der Gesellschaft: Juelich >Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 >Vorsitzender des Aufsichtsrats: MinDir Dr. Karl Eugen Huthmacher >Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender), >Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt, >Prof. Dr. Sebastian M. Schmidt >-------------------------------------------------------------------------- >---------------------- >-------------------------------------------------------------------------- >---------------------- > > >_______________________________________________ >HCP-Users mailing list >[email protected] >http://lists.humanconnectome.org/mailman/listinfo/hcp-users > > >________________________________ >The materials in this message are private and may contain Protected >Healthcare Information or other information of a sensitive nature. If you >are not the intended recipient, be advised that any unauthorized use, >disclosure, copying or the taking of any action in reliance on the >contents of this information is strictly prohibited. If you have received >this email in error, please immediately notify the sender via telephone >or return mail. > >_______________________________________________ >HCP-Users mailing list >[email protected] >http://lists.humanconnectome.org/mailman/listinfo/hcp-users _______________________________________________ HCP-Users mailing list [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
