> On Oct 4, 2016, at 9:03 PM, Ely, Benjamin <benjamin....@mssm.edu> wrote: > > Thanks Steve, that's good to keep in mind. Our acquisition is a single > "HCP-like" 15 minute run at MB6, 2.1mm isotropic resolution, TR=1s, AP phase > encoding, 32-channel head coil on a 3T Skyra; hopefully that gives us a > similar temporal profile.
It’s not much about the acquisition protocol (though in the multiband era, MB is now related to scanner transmitter stability), but rather the scanner stability itself. > Sounds like I should compare our temporal stability against the HCP's - is > there a measure you recommend? HCP Connectom Skyra scanner has quite small temporal drift and a very linear trend (specific to the gradient and body coil hardware characteristics), which a typical Skyra can’t match. To determine what detrending cutoff you should use for your site-specific data, you could run a 5-10min fBIRN phantom scan with your fMRI protocol and look at the scanner stability. _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
