Hi Iordanis,
Thanks for the suggestion but unfortunately the only option we get on the CV is "DTI on or
off". I suspect it is because this is a clinical machine and we don't have a "research key".
Do you, or anyone else, have any other ideas? Should I try resampling the data? If so, how
would you do it? With FLIRT?
Thanks in advance!
Rajeet
On Thu, 30 Jul 2009 11:33:03 -0400, Evangelou, Iordanis (NIH/NINDS) [E]
<[log in to unmask]> wrote:
>There are some user CVs on the GE scanner to turn off the imaging upsampling of any
sequence
>
>rhmethod = 1
>rhrcxres = 128
>rhrcyres = 128
>
>iordanis
>
>
>-----Original Message-----
>From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Rajeet
Saluja
>Sent: Thursday, July 30, 2009 10:51 AM
>To: [log in to unmask]
>Subject: [FSL] Problems with GE's DTI acquisitions
>
>Hi,
>
>About a week ago, I had an issue with probtrackx that, thanks to Saad, we
>were able to figure out had to deal with upsampling of our DTI images from
>128x128 to 256x256 that occured with the GE MRI that we have at our
>institution. Unfortunately, after much leg-work including speaking to the
>company rep, it seems that this is default at the time of acquisition and
>cannot be turned off. I tried a couple more scans and it seems that fsl is able
>to process the scans if I use 5 mm cuts but not at 3 mm. With 5mm cuts
>however, the images are kind of crappy and it still won't let me use masks
>created in structural space using my global T1 acquisition. I'm currently
>testing out 4mm but I'm not very optimistic.
>
>So, my question is, has anyone else run in to similar issues and, if so, how did
>you get around it? Are there ways of converting it back to 128x128 without
>modifying the data acquired? Thanks in advance...
>
>Rajeet
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