What are your settings on all the parameters on the Sequence:Special tab?
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Michael Harms, Ph.D.
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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: mha...@wustl.edu
From: "Mark A. Pinsk" <mpi...@gmail.com>
Date: Monday, November 23, 2015 10:39 AM To: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org> 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:
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
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- [HCP-Users] aliasing in diffusion images Mark A. Pinsk
- Re: [HCP-Users] aliasing in diffusion images Harms, Michael
- Re: [HCP-Users] aliasing in diffusion images Mark A. Pinsk
- Re: [HCP-Users] aliasing in diffusion images Mark A. Pinsk
- Re: [HCP-Users] aliasing in diffusion imag... Harms, Michael