Dear Freesurfer's experts,
I'm trying to follow fMRI Volume pipeline from "The minimal preprocessing pipelines for the Human Connectome Project" (NeuroImage, 2013) on HCP data.
The first step has to be the correction of gradient-nonlinearity-induced distortion. The correction is then done with a customized version of the gradient_nonlin_unwarp package available in FreeSurfer (Jovicich et al., 2006).
I couldn't manage to find this package on internet, the only things I've found is the freesurfer grad_unwarp command and a webpage ( https://surfer.nmr.mgh.harvard.edu/fswiki/GradientUnwarping) with no download link...
Where can I find this package and how to use it ?
Many thanks !
Best,
------------------------------------- Matthieu Vanhoutte, MSc Research Engineer - Department of Neuroradiology Regional University Hospital, Lille, France