That is not the right way to go about things. You should leave the voxel
dimensions at 2x2x2mm and then Register the FA to the T1 to get the desired
overlay. It is MUCH better to interpolate the calculated data than to
interpolate the raw data and then calculate. This is especially true if you
want to do tractography. You can easily still specify masks in structural
space and then specify the structural to diffusion transform.
Peace,
Matt.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf
Of Adil Javed
Sent: Wednesday, March 10, 2010 6:20 PM
To: [log in to unmask]
Subject: [FSL] DTI imaging
Hi,
for those who are experts in DTI:
I am acquiring DTI images on 3.0T Phillips scanner using 32 directions, FOV
240, acquired matrix is 120 x 118 with acquired voxel dimensions of 2x2x2.
In order to overlay DTI FA/MD/ or tracts on a FLAIR or T1 image, I need to
reconstruct the matrix to 256 with voxel RECON to 0.94 x 0.94 x 2 so they
align with my FLAIR or T1 images.
Question: is this ok or do you see any problems with this approach? By
reconstructing voxels down to 0.94 x 0.94 x 2 after they are Acquired in
2x2x2 size, am I losing any information?
many thanks for your help.
adil
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