I don't know what PFA is and am otherwise having some trouble following your question. There is grand mean intensity normalization to 10000, meaning that the entire 4D image inside the brain mask has a mean of 10000.
Peace, Matt. From: <hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org>> on behalf of mali s <s.malisun...@gmail.com<mailto:s.malisun...@gmail.com>> Date: Monday, November 21, 2016 at 8:08 PM To: "hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>" <hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>> Subject: [HCP-Users] 4D Intensity normalization in the fMRIVolume pipeline Dear HCP team, We are using minimally preprocessed volume files from HCP database (100206/MNINonLinear/Results/tfMRI_MOTOR_LR/tfMRI_MOTOR_LR.nii). The release notes for this subject say these files were processed using v3+ of the pipeline. I believe 4d intensity normalization to mean of 10^4 is being done here. However, PFA the mean brain activation (after applying mask) during the course of the scan . They are all close to 10^4, more like a global signal normalization for every 3d volume. I am having trouble reconciling both. Thanks in advance for the help. Regards, Mali _______________________________________________ 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. _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
