I believe there is another variable in the sequence that causes the flip. Peace,
Matt. From: <[email protected]<mailto:[email protected]>> on behalf of Thomas DeRamus <[email protected]<mailto:[email protected]>> Date: Wednesday, November 9, 2016 at 5:57 PM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: [HCP-Users] Question about UMinn 3T PRISMA dMRI_98_AP & PA Sequence Hi HCP Users, Our center recently began using the UMinn 3T PRISMA protocols and I noticed some minor distortion in the vmPFC region. I was planning on applying FSL's topup to try and correct for this but when I was making the phase encoding text file I noticed in the protocol that both the DWI_dir98_AP and DWI_dir98_PA seem to use A >> P phase encoding. http://lifespan.humanconnectome.org/data/LSCMRR_3T_printout_2014.08.15.pdf Does that mean that both are AP? I remember seeing the same when we first started the AP sequence on the scanner and that doesn't seem correct. I also noticed the only differences in the the b-tables were for the vector values for b0's in AP vs PA, with the rest the same. May I ask why this is or if it has anything to do with the phase encoding? -- Thomas DeRamus UAB Department of Psychology, Behavioral Neuroscience Graduate Research Trainee Civitan International Research Center 1719 6th Ave S, Suite 235J, Birmingham, AL 35233 Phone: 205-934-0971 Email: [email protected]<mailto:[email protected]>, [email protected]<mailto:[email protected]> _______________________________________________ HCP-Users mailing list [email protected]<mailto:[email protected]> 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 [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
