No, concatenate the inverse of it on to the end of each subject’s registration to remove the registration bias without having to do an enormous amount of pairwise computations.
Peace, Matt. From: John Griffiths <j.davidgriffi...@gmail.com<mailto:j.davidgriffi...@gmail.com>> Date: Saturday, April 1, 2017 at 4:31 PM To: Matt Glasser <glass...@wustl.edu<mailto:glass...@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] most typical subject for FA registration? Not sure exactly what you mean there by removing the group average effect. In the design matrix? I am now doing effectively that with a random subject, just wanted to draw / leech on the community to see if anyone was able to make an informed recommendation about which subject to choose for the first registration step. On 1 April 2017 at 15:13, Glasser, Matthew <glass...@wustl.edu<mailto:glass...@wustl.edu>> wrote: That does seem like a lot of computations. Why not pick a random individual, register to that and then remove the group average effect of registration, retaining the improved alignment across subjects while eliminating the bias caused by the initial subject? Peace, Matt. From: <hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org>> on behalf of John Griffiths <j.davidgriffi...@gmail.com<mailto:j.davidgriffi...@gmail.com>> Date: Saturday, April 1, 2017 at 2:09 PM To: "hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>" <hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>> Subject: [HCP-Users] most typical subject for FA registration? Hello. I was wondering if anyone has done the all-to-all TBSS registration step on FA images from the WU-Minn data to find the most typical subject for two-step FNIRT FA registration? If so would it be possible to get the most typical subjects' IDs? This would save me (and I'm sure many others) a very hefty analysis step. Ta, john -- Dr. John Griffiths Post-Doctoral Research Fellow Rotman Research Institute, Baycrest Toronto, Canada and Honorary Associate School of Physics University of Sydney _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org<mailto: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. -- Dr. John Griffiths Post-Doctoral Research Fellow Rotman Research Institute, Baycrest Toronto, Canada and Honorary Associate School of Physics University of Sydney ________________________________ 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
