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A vitamin E capsule taped to the temple will show up in the MPRAGE, and you
can compare  sulcal patterns in the EPI & MPRAGE images to determine L/R
in the EPIs. Collecting a set of lower resolution T1 images co-planar to
the EPIs can be helpful in this regard; they will also show the capsule.

Cheers,
Charlotte

Xiaoxu Liu wrote:
[log in to unmask]" type="cite"> 
Hi all, 

To make sure the L/R orientation is not flipped in the conversion and
processing, I want to attach a marker on the patient's forehead. The ideal
marker is the one that could show up in both MPRAGE and EPI sequence. I
tried to use a Gadolinium filled syringe as a marker but it can be barely
seen in MPRAGE and cannot be seen in EPI. Do you have any suggestions and
tricks? Thanks a lot.

-Xiaoxu


  

-- 
Charlotte Boettiger | Assistant Professor
Department of Psychology | Biomedical Research Imaging Center
University of North Carolina at Chapel Hill
304B Davie Hall, CB 3270 | Chapel Hill, NC  27599-3270
P: 919.962.2119 | F: 919.962.2537 | E: [log in to unmask]
www.unc.edu/~cab