[Mrtrix-discussion] how to read the track information

[Robert Smith]

Hi Yu,

The command tracks2prob in the current version of MRtrix can only generate
standard TDI images. The more general track-weighted images shown in the
recent NeuroImage paper were generated using in-house software, which is
unfortunately not compatible with the current version of MRtrix, but we hope
to release it as part of the next major revision of MRtrix.

If you are eager to generate these images yourself, it should be possible to
code yourself in MRtrix (making use of the classes provided), or in Matlab
using the function provided
here<http://www.nitrc.org/pipermail/mrtrix-discussion/2010-March/000122.html>to
read the track data. The additional information (such as FA) is not
stored within the MRtrix track file format; in our implementation, we read
the values along the length of each streamline from a scalar image, and draw
the relevant statistic (such as the mean) from these samples.

Best regards
Rob

--

Robert Smith
Melbourne Brain Centre
245 Burgundy Street
Heidelberg VIC 3084
Telephone: (+61 3) 9035 7128
Fax: (+61 3) 9035 7301
Email:  r.smith at brain.org.au
www.florey.edu.au <http://www.fni.edu.au>        www.brain.org.au



On Thu, Oct 20, 2011 at 1:51 PM, yu zhang <zhangyu2ustc at gmail.com> wrote:

> Hello,
>
>    I am working on the super-resolution track density maps. But I don't know how to extract the tracking information from .tck files.
> The package only provide the command tracks2prob to generate TDI images. But how can I merge other information together with the tracks?
>
> For example, I want to generate the TW-mean FA, which means mean FA along the streamlines for each voxel, or the TW-mean V1, which means mean major Vector along the streamline.
> What can I do to generate these images? Could you recommend some toolboxes?
>
> Looking forward for your reply.
>
> Thank you very much!
>
> Best Wishes!
>
> Yu Zhang.
>
>
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>
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