Hi Antonella - There's functional data, and then there's diffusion data. You don't need one to analyze the other. If you want to analyze functional data with FSL, you use FEAT. If you want to analyze diffusion data with FSL, you use this: http://www.fmrib.ox.ac.uk/fsl/fdt/index.html

a.y

On Mon, 29 Aug 2011, Antonella Kis wrote:

Dear FS experts,

I'm interested in doing DTI analysis, using FS.

Do I need to have functional data (feat) and then do I need to register the anatomical data on the functional one? My MRI data contains the following folders: 3DAx_T1, Ax_Flair, Ax_T2PD, DTI_15, DTI_30. I am not sure for a DTI /FSL analysis what data should I use.

1).Do I need to use the DTI data (DTI_15, DTI_30) and what steps should I follow in order to run a DTI/FSL data analysis for my subjects versus controls?  2).Do I need to run the dt_recon? In this case my input should be the dicom images from a DTI (DTI_15 or DTI_30) folder? 3) When I need to check the registration where I get the lowb.nii?

tkregister2 --mov dti/lowb.nii --reg dti/register.dat \ --surf orig --tag

4. Or, should I use trac-all on the DTI_15 or DTI_30 data?

5. Do I need to run  reg-feat2anat to first analyze my data with FEAT (No

Smoothing )as in the example posted online:

reg-feat2anat –featdir fbert1.feat –subject bert

6. From where fbert1.feat is coming/how was obtained?

Sorry for asking so many/silly  questions.

I will be greatly appreciate any help/directions/suggestions. Antonella