Excite pulse duration: 2560 us Refocus pulse duration: 5120 us Single band images: off MB LeakBlock Kernel: off MB RF phase scramble: off Time-shifted MB RF: off SENSE1 coil combine: ON Log physiology to file: off Invert RO/PE polarity: off Online multi-band recon: Online FFT scale factor: 1.00
On Mon, Nov 23, 2015 at 6:29 PM, Harms, Michael <[email protected]> wrote: > > What are your settings on all the parameters on the Sequence:Special tab? > > -- > Michael Harms, Ph.D. > ----------------------------------------------------------- > Conte Center for the Neuroscience of Mental Disorders > Washington University School of Medicine > Department of Psychiatry, Box 8134 > 660 South Euclid Ave. Tel: 314-747-6173 > St. Louis, MO 63110 Email: [email protected] > > From: "Mark A. Pinsk" <[email protected]> > Date: Monday, November 23, 2015 10:39 AM > To: "[email protected]" <[email protected]> > Subject: [HCP-Users] aliasing in diffusion images > > 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 > > > ------------------------------ > > 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
