[Mristudio-users] temporal lobe tracts

[Siewmin Gan]

Thanks Susumu. I'll try that.
Siewmin

On Tue, Feb 24, 2009 at 6:37 AM, susumu <susumu at mri.jhu.edu> wrote:

>  Hi Siewmin,
>
> Please make sure that you correctly set the "flip" options. If you are
> using Siemens and the manufacturer-provided gradient table, the chance is
> high that you have to "X-flip" before fiber tracking. If you are using
> Philips, then "Z-flip".
>
> Please place an ROI in the mid-sagittal corpus callosum and make sure that
> you get the correct shape of the corpus callosum. If not, you could be
> setting the "flip" in a wrong way.
>
> There is a detailed description about the "flip" function in the DtiStudio
> manual.
>
> Susumu
>
>  ------------------------------
> *From:* mristudio-users-bounces at mristudio.org [mailto:
> mristudio-users-bounces at mristudio.org] *On Behalf Of *Siewmin Gan
> *Sent:* Saturday, February 21, 2009 8:23 AM
> *To:* mristudio-users at mristudio.org
> *Subject:* [Mristudio-users] temporal lobe tracts
>
> Dear all,             I am trying to reproduce some tracts associated with
> the temporal lobe using the ROI drawing protocols from the paper
> "Reproducibility of Quantitative Tractography Methods Applied to Cerebral
> White Matter". The acquisitions of the DTI are similiar to the paper. I had
> good results with the ILF, but couldn't get the uncinate fasciculus and
> cingulum in controls and patients data. For these tracts, after I draw the
> 1st ROI with the "Or" function, I couldn't see tracts in the specified
> area/slice mentioned in the protocol to place the 2nd ROI.
>
>  I wonder if I have misinterpreted the protocols. Secondly, the dti slices
> were acquired parallel to the AC-PC line in the paper and the protocols are
> based on anatomical landmarks. If the dti data I tried on are not acquired
> exactly parallel to the AC-PC line, would it make a difference in the
> reproducibility using the protocol? Much appreciated if any of you have
> tried and could derive these two tracts.
>
> Many Thanks
>
> Siewmin
>
> _______________________________________________
> Mristudio-users mailing list
> Mristudio-users at mristudio.org
> http://lists.mristudio.org/mailman/listinfo/mristudio-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.mristudio.org/pipermail/mristudio-users/attachments/20090224/dec10e22/attachment.html