Dear SPMers
I want to plot t-maps using the results of the brain image data.
Would anyone give a right direction to get t-maps?
What I understand that before getting t-maps I should make t-contrasts first.
Is it right?
Then I tried : tasks->stats->contrast manager in SPM graphics window.
When I clicked “contrast manager?SPM ask to select SPM.mat file.
What kind of SPM.mat file I should make?
I got 4 groups and each group has 5 independent components, which has 510340
voxels on each independent component. I want to compare different groups each
components.
In ‘Contrasts Sessions -> T contrast vector? what kind of T-contrasts vector I
should put in here? Just showing activation and deactivation the areas of the
SPM t-map, the contrast will be [ 1 ? 0 ?] ? A 1 x n vector should be entered
for T- contrasts. n is the voxel number is right? If I am right, how can I put
it in?
Any recommend papers to understand about SPM t-map and any advice on this
matter would be greatly appreciated. I really need help…….
Cheers
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In Kang
Ph.D Statistics Student
Department of Mathematics and statistics
University of Canterbury
Private Bag 4800
Christchurch New Zealand
Tel: +64 3 364 2987 ext 8873
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