[Mrtrix-discussion] dwi2response fsl error

[Donald Tournier]

Hi Romain,

Yes, we've had reports of people having trouble with the new dwi2response
app. This is something we're going to be looking into in the near future...

Cheers,
Donald

--
Dr J-Donald Tournier (PhD)

Senior Lecturer, Biomedical Engineering
Division of Imaging Sciences & Biomedical Engineering
King's College London

A: Department of Perinatal Imaging & Health, 1st Floor South Wing, St
Thomas' Hospital, London. SE1 7EH
T: +44 (0)20 7188 7118 ext 53613
W:
http://www.kcl.ac.uk/medicine/research/divisions/imaging/departments/biomedengineering

On 16 Jun 2014 16:49, "romain valabregue" <romain.valabregue at upmc.fr> wrote:

> Hello
>
> I get an error on several dataset with de dwi2response :
>
>  dwi2response -grad grad.b -mask mask_erode3.nii  -sf sf_out.nii
> rfsl_eddycor.nii resp.txt
>
> dwi2response: initialising response function...  100%
> dwi2response: optimising response function..   .   gsl:
> lib/math/cholesky.cpp:151: ERROR: matrix must be positive definite
> Default GSL error handler invoked.
> Abandon
>
> It takes quite a long time before getting the error (about 1/2 an to 1
> hour)
>
>
> Although it works ok with connectome B3000 data, I have problem with other
> data set that was working before with mrtrix2
>
> Many thanks
>
> Romain
>
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