[Mrtrix-discussion] NaN values in response.txt

[Donald Tournier]

Hi Chris,

I can't think of much that could cause this problem, but the most obvious
one is supplying an empty single-fibre mask at the estimate_response step.
Another reason might have been if any of the single-fibre voxels has one or
more zero DW intensities - but I've just looked at the code, and there are
safeguards in place to handle negative or zero DW intensities, so I can't
see that it could be that either. If none of this helps, maybe you can send
me one of the offending data sets so I can have look?

Cheers,

Donald.


On 27 August 2012 11:57, Chris Adamson <chris.adamson at mcri.edu.au> wrote:

> Donald,
>
> I am getting NaN values in the response.txt file in rare cases. How can
> I diagnose the problem/fix it? What should I look for in the data that
> would cause a failure of the ellipse fitting?
>
> Chris.
> --
> Dr Christopher Adamson, PhD (Melb.), B Software Engineering (Hons.,
> Monash)
> Research Officer
> Developmental Imaging, Critical Care and Neurosciences
>
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> The Royal Children’s Hospital
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-- 
*Dr Jacques-Donald Tournier
*
Research Fellow

The Florey Institute of Neuroscience and Mental Health
Melbourne Brain Centre - Austin Campus
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