Hi Anders, Here's the deal on getting the gradient unwrapping coefficients and code (from p. 17 of the S500 Ref Manual): In the HCP processed datasets for all scan modalities (structural, fMRI, and dMRI), these distortions have been corrected for by spatially warping the images using gradient field information specific to the Connectome Skyra. The gradient unwarping code is available at https://github.com/ksubramz/gradunwarp/blob/master/Readme.md <https://github.com/ksubramz/gradunwarp/blob/master/Readme.md> (Jovicich et al., 2006). The gradient field nonlinearity coefficients for the Connectome Skyra are considered by Siemens to be proprietary information. To request access to these coefficients, please contact your Siemens collaboration manager or email Dingxin Wang at [email protected] <mailto:[email protected]>.
Sorry it’s not easier, but this is a Siemens decision, not ours. David > On Dec 17, 2016, at 3:08 AM, Anders Eklund <[email protected]> wrote: > > Hello, > > I'm trying to run the GenericfMRIVolumeProcessingPipeline.sh for one subject. > To include gradient distortion correction (for HCP data) it seems like the > file 'coeff_SC72C_Skyra.grad' is needed, where can I find this file? Does it > require a research agreement with Siemens? > > - Anders > > _______________________________________________ > HCP-Users mailing list > [email protected] <mailto:[email protected]> > http://lists.humanconnectome.org/mailman/listinfo/hcp-users > <http://lists.humanconnectome.org/mailman/listinfo/hcp-users> _______________________________________________ HCP-Users mailing list [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
