Hi all, I've attempted to collect diffusion data with the CMRR sequence at our Prisma, and got aliasing in the image (very apparent at higher b value). Snapshot here: https://dl.dropboxusercontent.com/u/3889124/b2500-MB3.tiff
Any suggestions on what the issue(s) could be? I see the same when I lower MB from 3 to 2. Here are my protocol parameters: 64-channel head/neck coil 90 interleaved transverse slices in-plane resolution = 1.5mm slice thickness = 1.5mm with no inter-slice gap field of view (FOV) = 210mm base resolution = 140 repetition time (TR) = 4200ms echo time (TE) = 87ms flip angle (FA) = 78 deg refocus FA = 160 deg phase partial fourier (PPF) = 6/8 gradient reversed fat suppression phase encode (PE) direction = anterior/posterior bandwidth = 1880Hz/Px echo spacing (ES) = 0.71ms multiband acceleration factor = 3 SENSE (R=1) image reconstruction bmax = 2500 s/mm^2 thanks! Mark _______________________________________________ HCP-Users mailing list [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
