Since most of HCP has each diffusion scan run twice (once each) with different phase encode directions, you could analyze each of those separately (only using the B0s from the opposite phase encode direction). Then perform whatever test-retest tests you are interested in. Note, that you will end up with slightly different masks using this technique in eddy (I haven't been able to track down why). You should try to come up with a way to control for this.
hth d On Thu, Jan 28, 2016 at 4:05 PM, Joelle Zimmermann <[email protected]> wrote: > Hi HCPers. > > I'm curious about the test-retest reliability and the inter subject versus > intra subject variability of the HCP resting functional and diffusion data, > particularly whether anyone has looked at this in SC and FC connectomes? > > To check this out in the rsFC data is simple, using the two scans (pre and > post), or alternatively splitting the time series in half to look at > reproducibility. But what about SC derived from diffusion data, since > diffusion was measured only once the intra subject variability/ test retest. > Does anyone know of a systematic check of variability in the SC data? > > Thanks, > Joelle > > _______________________________________________ > 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
