Hi Wang,
this is only a warning. Usually it is a bad idea to input two different
images into the longitudinal pipeline. It would be good to find out why
your inputs have different geometries. You should find the answers to
these questions in order to know what you are working with: Has someone
changed the protocol on the scanner? What else has changed? Maybe
hardware? That would be a problem.
Best, Martin
On 07/03/2014 09:38 AM, wang kangcheng wrote:
Dear experts
Today, I conduct the longitudinal analysis according to tutorials
of freesurfer
(https://surfer.nmr.mgh.harvard.edu/fswiki/LongitudinalProcessing).
But, when I do recon-all -base <templateid> -tp <tp1id> -tp <tp2id>
... -all, it report the error:
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
mri_diff --notallow-pix
/Users/wangkangcheng/Desktop/long_fs_test/long/s12002_MRI2/mri/rawavg.mgz
/Users/wangkangcheng/Desktop/long_fs_test/long/s12002_MRI1/mri/rawavg.mgz \n
Volumes differ in dimension
v1dim 176 256 256 1
v2dim 176 184 200 1
\n*******************************************************************************
WARNING: Image geometries differ across time, maybe due to aquisition changes?
This can potentially bias a longitudinal study! Will continue in 10s.
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
When I check the raw data and find that the structural data of
s12002_MRI1 was the file which was converted by the command of dcm2nii
and begin with "co". However, data of s12002_MRI2 was the file which
begin with "o". But, when I used the file which begin with "co", they
did not have same dimension. How could I solve the problem? (PS: have
processed hundreds of data for subject of MRI1)
Thank you
------------------------------------------------------------------------
Wang Kangcheng
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--
Martin Reuter, Ph.D.
Instructor in Neurology
Harvard Medical School
Assistant in Neuroscience
Dept. of Radiology, Massachusetts General Hospital
Dept. of Neurology, Massachusetts General Hospital
Research Affiliate
Computer Science and Artificial Intelligence Lab,
Dept. of Electrical Engineering and Computer Science,
Massachusetts Institute of Technology
A.A.Martinos Center for Biomedical Imaging
149 Thirteenth Street, Suite 2301
Charlestown, MA 02129
Phone: +1-617-724-5652
Email:
mreu...@nmr.mgh.harvard.edu
reu...@mit.edu
Web : http://reuter.mit.edu
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