It doesn't matter what order you concatenate the data in, but I would not recommend only analyzing the data of one phase encoding direction.
Peace, Matt. From: <hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org>> on behalf of Joelle Zimmermann <joelle.t.zimmerm...@gmail.com<mailto:joelle.t.zimmerm...@gmail.com>> Date: Monday, November 23, 2015 at 12:48 PM To: "Elam, Jennifer" <e...@wustl.edu<mailto:e...@wustl.edu>> Cc: "hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>" <hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>> Subject: Re: [HCP-Users] Phase Encoding left-to-right and right-to-left Hi Jennifer and Matt, Thanks for your help. I have a few clarification questions below: Does it matter in which order I concatenate the LR and the RL .nii's? My ultimate goal is to create a functional connectivity matrix from the time series. #3 in the link you sent describes that there are 4 runs per subject. Is this the REST 1, and REST 2, each with LR and RL phase encoding directions? Would using only one phase encoding direction (i.e. do analysis on LR) expect to effect the results? Thanks, Joelle On Mon, Nov 23, 2015 at 1:17 PM, Jennifer Elam <el...@pcg.wustl.edu<mailto:el...@pcg.wustl.edu>> wrote: #3 on https://wiki.humanconnectome.org/display/PublicData/HCP+Users+FAQ may be of help. Best, Jenn Jennifer Elam, Ph.D. Outreach Coordinator, Human Connectome Project Washington University School of Medicine Department of Anatomy and Neurobiology, Box 8108 660 South Euclid Avenue St. Louis, MO 63110 314-362-9387<tel:314-362-9387> el...@pcg.wustl.edu<mailto:el...@pcg.wustl.edu> www.humanconnectome.org<http://www.humanconnectome.org> From:hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org> [mailto:hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org>] On Behalf Of Glasser, Matthew Sent: Monday, November 23, 2015 12:16 PM To: Joelle Zimmermann; hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org> Subject: Re: [HCP-Users] Phase Encoding left-to-right and right-to-left Usually you concatenate them temporally after demeaning (and perhaps variance normalizing). Peace, Matt. ________________________________ From:hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org> <hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org>> on behalf of Joelle Zimmermann <joelle.t.zimmerm...@gmail.com<mailto:joelle.t.zimmerm...@gmail.com>> Sent: Monday, November 23, 2015 11:33 AM To: hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org> Subject: [HCP-Users] Phase Encoding left-to-right and right-to-left Hi all, Would anyone be able to explain a bit more about the phase-encoding directions LR and RL for the (preprocessed) REST1 session data from 500 subjects +MEG2? I understand that LR is left to right and RL is right to left. I'm wondering, are these meant to be somehow combined, or is only one of these typically chosen? Thanks, Joelle http://www.humanconnectome.org/documentation/Q1/data-in-this-release.html Q1 Data Release: About the Dataset | Human Connectome Project 76 healthy adult subjects in the age range 22 - 35 participated in the first quarter of data collection. These include 68 subjects with data from all or nearly all ... Read more...<http://www.humanconnectome.org/documentation/Q1/data-in-this-release.html> _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org<mailto:HCP-Users@humanconnectome.org> http://lists.humanconnectome.org/mailman/listinfo/hcp-users _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org<mailto:HCP-Users@humanconnectome.org> http://lists.humanconnectome.org/mailman/listinfo/hcp-users _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org<mailto:HCP-Users@humanconnectome.org> http://lists.humanconnectome.org/mailman/listinfo/hcp-users _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
