[Mristudio-users] fiber tracking

[Youngbin Kwak]

Thanks Susumu,

We have 6 tensor files (Dxx, Dxy, ...) each of them in .img/.hdr
I saw that in DTIstudio it allows saving analyze files into raw .dat format?

I'm wondering if we know how the principal vector file should look like, I
should be able to convert and change the files we have into the format of
data DTIstudio can take.

Could you send me a sample file of pricipal vector that I could determine
how the information is laid out so that I can figure out a way to change my
files?

Thanks!
Youngbin



On Wed, May 19, 2010 at 9:52 PM, susumu mori <susumu at mri.jhu.edu> wrote:

> Hi youngbin,
>
> The image dimension depends on your data and it's difficult to say what it
> is. Our MNI space is 181x217x181, but I know that there are several versions
> of MNI templates with different dimensions.
>
> For the vector map, it unfortunately has to be raw format without header,
> which is floating point with 3 vector components x D1 x D2 x D3. The
> software you are using needs to have a way to save the vector file in this
> raw format.
>
> susumu
>
>   On Wed, May 19, 2010 at 3:15 PM, Youngbin Kwak <youngbin at umich.edu>wrote:
>
>>   Hello,
>>
>> We would like to perform fiber tracking using FA maps created from other
>> programs. FA maps are currently in all in MNI normalized space in analyze
>> format. I've chosen the fiber-tracking option from the file menu of
>> DTIstudio and then a window that says Fiber-tracking options pops up. I
>> chose the continuous tracking using principal ventor and FA map and it
>> brings me to the window where you have to set image parameters. For FA-map,
>> I chose the analyze .img file. for the principal vector, I wasn't sure what
>> I should choose.. Also for image dimension and voxel size, I wasn't sure
>> what what values to put..
>> Can someone guide me here?
>>
>> Thanks!
>> Youngbin
>> --
>> Youngbin Kwak M.S.
>> Ph.D. candidate, Neuroscience Graduate Program
>> Cognitive Science & Cognitive Neuroscience Program
>> University of Michigan
>>
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-- 
Youngbin Kwak M.S.
Ph.D. candidate, Neuroscience Graduate Program
Cognitive Science & Cognitive Neuroscience Program
University of Michigan
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