[log in to unmask]" type="cite">Hi Helen,This problem is also bothering me. The voxel size as indicated in the diagnal of the MAT matrix was sometimes not in concordance with MRIcron (as seen from image 'information' on the menu of MRIcron).For example, my MAT matrix of a head-motion-corrected nifti image is :-3.4124 0 -0.72 223-0.033 3.4263 0.4806 -159-0.42 -0.27 5.94 14.7The voxel size should be 3.4124* 3.4263*5.94?However, MRIcron reported it as 3.5*3.5*7, quite different Huh?What I thought is that, maybe after realignment (motion correction with rigid body transformation), the MAT file had been changed, not as diagnal as it should be before. So the voxel size should not be taken from the diagnal number of the MAT file. Am I right?Han
2011/11/25 Helen Beaumont <[log in to unmask]>
Help please.
I am writing a Matlab matrix (read from a Phillips ParRec file) out as nii data.
The voxel size is 3.5 x 3.5 x 5.95 mm, 64 x 64 x 20 matrix.
N.mat is
3.5000 0 0 -113.7500
0 3.5000 0 -113.7500
0 0 5.9500 -62.4750
0 0 0 1.0000
When I use SPM to display it, the voxel size is OK, and origin is close to AC.
However, if I use MRIcroN with “re-orient on load” box checked in preferences,
voxel size is 1 x 1 x 1 mm, and origin is bottom L corner.
Helen Beaumont
ISBE
University of Manchester
Stopford Building, Oxford Rd
Manchester M13 9PT
Tel: 0161 275 1259
--
Han ZHANG
http://publicationslist.org/han_zhang
Center for Cognition and Brain Disorder, Hangzhou Normal UniversityAddr: 7th Bldg, Affil Hosp of Hangzhou Normal Univ, Wenzhou Rd 126#, Hangzhou 310015Fax/Tel: +86-0571-88285651Mobile Tel: 15869174768
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