No clue to what went wrong here, but, if possible, try to avoid the conversion step through ANALYZE, as that format does not support voxel2world mapping and information about your original angulation will be lost.
Good luck,
Bas
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Dr. S.F.W. Neggers
Division of Brain Research
Rudolf Magnus Institute for Neuroscience
Utrecht University Medical Center
Visiting : Heidelberglaan 100, 3584 CX Utrecht
Room B.01.1.03
Mail : Huispost B01.206, P.O. Box 85500
3508 GA Utrecht, the Netherlands
Tel : +31 (0)88 7559609
Fax : +31 (0)88 7555443
E-mail : [log in to unmask]
Web : http://www.neuromri.nl/people/bas-neggers
: http://www.brainsciencetools.com (CEO)
--------------------------------------------------
________________________________________
From: SPM (Statistical Parametric Mapping) [[log in to unmask]] on behalf of Pieter Vandemaele [[log in to unmask]]
Sent: Wednesday, January 30, 2013 2:39 PM
To: [log in to unmask]
Subject: [SPM] image orientation mismatch
Dear all,
I want to do an anova analysis with 2 factors, age(young/old) and
corrected (yes/no).
In fact, all images are processed until normalisation. Then all images
are converted to Analyze and processed in another program (PVELAB) and
converted back to Nifti and smoothed.
The original images are also converted back Nifti and smoothed so all
images underwent the same transformation.
The corrected and uncorrected images are then used in the Anova.
I got the following error running the Anova module in spm_check_orientations
Running 'Factorial design specification'
Mapping files :
** The images do not all have same orientation and/or voxel sizes. **
The function assumes that a voxel in one image corresponds exactly
with the same voxel in another. This is not a safe assumption if
the orientation information in the headers or .mat files says that
the images are oriented differently. Please ensure that you process
all data correctly. For example, you may have realigned the images,
but not actually resliced them to be in voxel-wise alignment.
Here are the orientation matrices of the image volumes. This list
can be used to determine which file(s) are causing the problem.
[-2 0 0 80; 0 2 0 -114; 0 0 2 -52] file 1
[-2 0 0 80; 0 2 0 -114; 0 0 2 -53] file 2
I now show only the difference between corrected and uncorrected in the
factorial design.
Is this due to rounding errors like mentioned in
https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0708&L=SPM&P=R35432&I=-3&d=No+Match%3BMatch%3BMatches
How can I correct for this, what is the meaning of -52 and -53?
Are
Regards
Pieter
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