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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