Intro information:
### Gradient direction table for Human Connectome Project (HCP) dMRI (WU-Minn ### consortium). Each table acquired once with right-to-left and left-to-right ### phase encoding polarities, using the CMRR multiband diffusion sequence, ### with bmax = 3000 s/mm^2. Shells at 1000, 2000, and 3000 s/mm^2 are ### obtained through appropriate weighting of the vector norm. ### ### The diffusion directions were obtained using a toolbox available from ### INRIA that returns uniformly distributed directions in multiple q-space ### shells. The directions are optimized so that every subset of the first M ### directions is also isotropic. References and the INRIA toolbox can be ### found at: ### http://www-sop.inria.fr/members/Emmanuel.Caruyer/q-space-sampling.php ### ### NOTE: These gradient directions were tested for use on the HCP customized ### Skyra scanner with 100 mT/m gradients and may not be optimal for use with ### other scanner systems. ### ### Further questions can be directed to the HCP Data Users mailing list ### (hcp-user@humanconnectome.org) by signing up at ### http://www.humanconnectome.org/contact
File with vectors: HCP_Diffusion_Vectors.txt