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Thank you for your help.
However, we continuously got the warning "log of zero" error message
and failed,
when we were trying to co-register the anatomical coronal to functional
EPI
coronal images. We already try to adjust the AC location as well
as the orientation of both
sets of images. I just wonder if there is anything else we can
try.
Our coronal anatomical images are not a complete entire brain, but it
is close
to, since there are 30 slices with 5 mm slice thickness. The
epi data set is at
the identical slice location with the same slice number and thickness.
Do you
think to cover the complete entire brain may help or not?
Thanks again.
Wen
John Ashburner wrote:
If you are spatially normalising or using the default between-modality
coregistration method, then I'm afraid that the orientation is very important.I would suggest manually re-orienting the data via the <Display> button.
Take a look at the following kink for a few more clues:
http://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=ind9910&L=spm&P=R1689Best regards,
-John> I have a set of anatomical (T1) and functional MRI (EPI) images. They
> both are acquired in the coronal plane.
> When I displayed, they are not in the right orientation as the images
> acquired in the axial plane do.
> They seem to need several flips in pitch and yaw to be able to be
> displayed in the proper orientation.
>
> I wonder that do I need to flip them into the proper orientation for
> spatial and statistical processing or it doesn't matter.
>
> I guess that if the AC point can be properly identified as the origin,
> the orientation of images is not that important
> in the spatial processing as well as statistical analysis. Is this
> right?--
Dr John Ashburner.
Wellcome Department of Cognitive Neurology.
12 Queen Square, London WC1N 3BG, UK.
tel: +44 (0)20 78337491 or +44 (0)20 78373611 x4381
fax: +44 (0)20 78131420
http://www.fil.ion.ucl.ac.uk/~john
mail: [log in to unmask]
--
===================================================
Wen-Ching Liu, Ph.D.
Assistant Professor of Radiology
Department of Radiology
University of Medicine and Dentistry of New Jersey
150 Bergen Street
Newark, New Jersey 07103
(voice) 973-972-2281
(fax) 973-972-0836
====================================================