Hi Jolinda,
what a pai. But we are brave, aren't we?!;)
Yep, as far as I am aware only ep2d_diff uses it. I don't know if there is an additional DICOM header entry for having set "prs" in the DiffusionVectors.txt but let me cc to Micheal Zwanger, he will know. Michael - can you help us out?
Best wishes to both of you-
Andreas
-----Ursprüngliche Nachricht-----
Von: Jolinda Smith [mailto:[log in to unmask]]
Gesendet: Do 28.06.2007 18:30
An: Bartsch, Andreas
Cc: [log in to unmask]; [log in to unmask]
Betreff: Re: WG: [FSL] DTI direction table
No, it doesn't. I didn't know about this. I'll have to look into it. Any more information you have would be appreciated. Is it only the ep2d_diff sequence that uses this file?
--
Jolinda Smith
MR Physicist
Lewis Center for Neuroimaging
University of Oregon
Eugene, OR 97403
[log in to unmask]
On Thu, 28 Jun 2007 07:19:28 +0200, <[log in to unmask]> wrote:
>
> Hi Jolinda,
>
> This is in response to your FSL mail, probably better to post it here.
>
> >These are relative to the scanner
>
> Not always: If you define:
>
> CoordinateSystem = prs
>
> in your DiffusionVectors.txt file, they will be relative to the image. Does MRIConvert account for that?
> Thanks,
> Andreas
>
>
> -----Ursprüngliche Nachricht-----
> Von: FSL - FMRIB's Software Library [mailto:[log in to unmask]] Im Auftrag von Jolinda Smith
> Gesendet: Donnerstag, 28. Juni 2007 00:51
> An: [log in to unmask]
> Betreff: Re: [FSL] DTI direction table
>
> The directions are stored in the CSAImageHeader private tag, under the heading DiffusionGradientDirection. These are relative to the scanner, not the image, so they will need to be corrected for any rotations in your slice prescription. Our program MRIConvert will do this automatically, if you want to try it. You can download windows or linux versions at lcni.uoregon.edu/~jolinda/MRIConvert.
>
> --
> Jolinda Smith
> MR Physicist
> Lewis Center for Neuroimaging
> University of Oregon
> Eugene, OR 97403
> [log in to unmask]
>
> On Wed, 27 Jun 2007 11:18:39 +1000, Fang Ke <[log in to unmask]> wrote:
> > Hi, Dear all:
> > We used the SIEMENS TIM 3T MRI system to get the DTI images. Now
> > we have a prolbem. We want to get the gradient direction table from
> > the DICOM files. How can we get it and what data type it is?
> > Thanks a lot.
> > Best regards
> > Ke
> >
> >
> >
> > --
> > Ke Fang
> > Research Officer
> > Neuroimaging and Neuroinformatics
> > Howard Florey Institute
> > University of Melbourne Vic 3010
> > Ph: 61-3-8344 6510
> > Fax: 61-3-9347 0446
> > E-mail: [log in to unmask]
> >
> >
> >
> > --
> > Ke Fang
> > Research Officer
> > Neuroimaging and Neuroinformatics
> > Howard Florey Institute
> > University of Melbourne Vic 3010
> > Ph: 61-3-8344 6510
> > Fax: 61-3-9347 0446
> > E-mail: [log in to unmask]
> >
>
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