Hi Peggy - It's hard to diagnose the problem by seeing only the tracts and
not the rest of the data, but this does look very strange. 1.5T is not a
problem, but anisotropic resolution is not optimal for tractography, as it
can bias the amount of diffusion measured in the direction that the voxels
are larger.
If you upload the entire data set (all the tracula directories: dmri,
dmri.bedpostX, dlabel, dpath) for me here, I'll take a closer look.
https://gate.nmr.mgh.harvard.edu/filedrop2/
a.y
On Mon, 8 Sep 2014, Peggy Skelly wrote:
> Hello Tracula experts,
> I was wondering if you could comment on the quality of the tracts
> reconstructed with our
> 1.5T data. These 2 files are from the same subject at 2 timepoints, processed
> in the
> longitudinal stream.
>
> Is much of the non-smooth look of the tracts due to the resolution of the dwi
> scans
> (1.8x1.8x4mm)?
> What could be the source of the diagonal lines/gaps in the tracts seen in tp1
> when
> viewed from above?
>
> Thanks,
> Peggy
>
>
>
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