Re: [HCP-Users] DWI in CCF Prisma protocol

7 at 3:38 PM To: Jeffrey Spielberg <jspielb...@psych.udel.edu> Cc: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org> Subject: Re: [HCP-Users] DWI in CCF Prisma protocol That's right. -Keith On Fri, Sep 29, 2017 at 4:33 PM, Jeffrey Spielberg <jspielb...@psych.udel

Re: [HCP-Users] DWI in CCF Prisma protocol

That's right. -Keith On Fri, Sep 29, 2017 at 4:33 PM, Jeffrey Spielberg < jspielb...@psych.udel.edu> wrote: > One further question: it looks like there no separate AP/PA fieldmaps for > dMRI in the CCF protocol, whereas there are SE fieldmaps for resting - is > that correct? If so, is this

Re: [HCP-Users] DWI in CCF Prisma protocol

One further question: it looks like there no separate AP/PA fieldmaps for dMRI in the CCF protocol, whereas there are SE fieldmaps for resting - is that correct? If so, is this because the b0 images from the dMRI can be used for this purpose (e.g., in topup)? Best, Jeff -- Jeffrey M.

Re: [HCP-Users] DWI in CCF Prisma protocol

We essentially split the ~197 direction in half, and the two halves can't have the exact same number of directions due to how they are stored on the scanner, so "part 1" is 98 directions and "part 2 is 99. each is then collected both AP and PA. FYI, each scan is actually 92 diffusion volumes

Re: [HCP-Users] DWI in CCF Prisma protocol

In general one wants to get as many gradient directions as possible. Perhaps Mike knows the answer to your other question. Matt. On 9/28/17, 2:59 AM, "hcp-users-boun...@humanconnectome.org on behalf of Jeffrey Spielberg"

[HCP-Users] DWI in CCF Prisma protocol

Hi all, I’m interested in setting up a diffusion protocol similar to the CCF protocol and have two questions. First, what’s the difference between the dir98 and dir99 acquisitions (beyond having different vectors)? It looks like both sample on 2 shells, use the same b-values, and have about