Hi, “AP” (short for anterior-to-posterior) and “PA” (short for posterior-to-anterior) refer to the phase encoding direction. In general, as Jenn said, we recommend using both the AP and PA data, so that your results aren’t “biased” toward a particular phase-encoding direction.
Is there a particular reason that you only want to use a single “AP” run? Cheers, -MH -- Michael Harms, Ph.D. ----------------------------------------------------------- Associate Professor of Psychiatry Washington University School of Medicine Department of Psychiatry, Box 8134 660 South Euclid Ave. Tel: 314-747-6173 St. Louis, MO 63110 Email: mha...@wustl.edu From: <hcp-users-boun...@humanconnectome.org> on behalf of Laserboy 1122233 <fmri2...@gmail.com> Date: Monday, March 26, 2018 at 10:57 AM To: "Elam, Jennifer" <e...@wustl.edu> Cc: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org> Subject: Re: [HCP-Users] Fwd: analysing the 7T rsfMRI Dear Jenn and all, Many thanks for your email and replay. Is the AP the fold direction? or what is it exactly? May I ask if I analyze the data with AP flold direction is this acceptable? I have used and downloaded other free data (e.g. the fcon 1000) but all what I analysed before where one nifit file and never seen such rsfMRI. So how much will this be going to affect the data analysis? and whether it is a big problem? Many thanks Aser On Mon, Mar 26, 2018 at 4:25 PM, Elam, Jennifer <e...@wustl.edu<mailto:e...@wustl.edu>> wrote: Hi Aser, First off, if you have 7T preprocessed rfMRI data that we previously released, do not use it. There was a processing error that we have now fixed and are preparing to rerelease the corrected preprocessed data in the next couple of weeks. If you are processing the unprocessed 7T data yourself, we recommend analyzing the runs in AP/PA pairs, or using all 4 runs. Advice on demeaning and normalizing the timeseries and then concatenating the runs is on the HCP-Users FAQ wikipage<https://wiki.humanconnectome.org/display/PublicData/HCP+Users+FAQ#HCPUsersFAQ-3.IseethatHCPdistributesgroupaveragedenseconnectomefiles.Doyoualsoprovideconnectivitymatricesforindividualsubjects?>. Best, Jenn Jennifer Elam, Ph.D. Scientific Outreach, Human Connectome Project Washington University School of Medicine Department of Neuroscience, Box 8108 660 South Euclid Avenue St. Louis, MO 63110 314-362-9387<tel:314-362-9387> e...@wustl.edu<mailto:e...@wustl.edu> www.humanconnectome.org<http://www.humanconnectome.org/> ________________________________ 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 Laserboy 1122233 <fmri2...@gmail.com<mailto:fmri2...@gmail.com>> Sent: Monday, March 26, 2018 10:15:39 AM To: hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org> Subject: [HCP-Users] Fwd: analysing the 7T rsfMRI Hello I am new to the data and apologies if this is a naive question. All of the data contain or acquired with AP and or PA. If I would like to use for example conn to analyse the data can I just analyse rest 1 (PA) or it has to be both? If both how can I combine them or proceed ? Many thanks Aser _______________________________________________ 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 ________________________________ The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail. _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
