Hi,

Check out this paper about transforming MNI to Talairach and how it differs for SPM and FSL
http://www.brainmap.org/pubs/LancasterHBM07.pdf

This software has the transformations discussed in the paper.  You can feed it a text file of coordinates and it will transform them for you.

http://www.brainmap.org/ale/

Cheers,
Jeanette

On Mon, Nov 4, 2013 at 5:00 AM, Rosalia Dacosta Aguayo <[log in to unmask]> wrote:

Dear FSL experts,

I have using a paper that reports anatomical regions with Tailarch coordinates.

So, when try to use them in order to draw an spherical roi of 8mm of diameter...the roi does not appears in the correct place.

For example: for Precuneus, they report -4 -58 44 (x, y and z respectively). Any idea about how can I use them? When I enter those coordinates into the MNI152 template of 2mm of resolution, they seem that the location is right...but, when I draw the roi...there is a significant misplacement and I do not know what to do. Any suggestion would be very appreciate.

The steps I followed were:

1.echo "X Y Z" | std2imgcoord -img $FSLDIR/data/standard/MNI152_T1_2mm -std $FSLDIR/data/standard/MNI152_T1_2mm -vox -

2.write down the numbers from step 1 (or store them in a variable using backquotes if you are familiar with that)

3.fslmaths $FSLDIR/data/standard/MNI152_T1_2mm -mul 0 -add 1 -roi A 1 B 1 C 1 0 1 -kernel sphere 8 -dilF sphereROI

In X Y and Z I wrote the new coordinates that appear when I write -4 -58 and 44 in the mm place....is this wrong?

Any help would be very appreciate,

Yours sincerely,

R.