Hi Yu,<br><br>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.<br>
<br>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 <a href="http://www.nitrc.org/pipermail/mrtrix-discussion/2010-March/000122.html">here</a> 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.<br>
<br>Best regards<br>Rob<br clear="all"><br>--<br><br>Robert Smith<br>Melbourne Brain Centre<br>245 Burgundy Street<br>Heidelberg VIC 3084<br>Telephone: (+61 3) 9035 7128<br>Fax: (+61 3) 9035 7301<br>Email: <a href="mailto:r.smith@brain.org.au" target="_blank">r.smith@brain.org.au</a><br>
<a href="http://www.fni.edu.au" target="_blank">www.florey.edu.au</a> <a href="http://www.brain.org.au" target="_blank">www.brain.org.au</a><br><span style="font-size: 9pt; font-family: "Times New Roman","serif"; color: red;"></span><br>
<br><br><div class="gmail_quote">On Thu, Oct 20, 2011 at 1:51 PM, yu zhang <span dir="ltr"><<a href="mailto:zhangyu2ustc@gmail.com">zhangyu2ustc@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre>Hello,<br><br> I am working on the super-resolution track density maps. But I don't know how to extract the tracking information from .tck files. <br>The package only provide the command tracks2prob to generate TDI images. But how can I merge other information together with the tracks? <br>
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.<br>What can I do to generate these images? Could you recommend some toolboxes?<br>
Looking forward for your reply.<br><br>Thank you very much!<br><br>Best Wishes!<br><font color="#888888"><br>Yu Zhang.<br></font></pre>
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