<div dir="ltr">Hi Hak,<div><br></div><div>Seems to me what you're after is something like this:</div><div><ol><li>For each subject, use "tracks2prob" to generate an image of the number of streamlines through each voxel (i.e. a track density image).</li><li>threshold each map at some suitable value using "threshold -abs"</li><li>add up all of these images across subjects using "mradd"</li></ol>That should give you an image where the value in each voxel is the number of subjects who had more than a given number of streamlines through that voxel. You can display that as you like, probably as an overlay on some other image with whatever colour mapping you want, which you can do in MRView.</div><div><br></div><div>Cheers,</div><div>Donald.</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 5 May 2015 at 11:25, Hak Fujiyama <span dir="ltr"><<a href="mailto:Hak.Fujiyama@faber.kuleuven.be" target="_blank">Hak.Fujiyama@faber.kuleuven.be</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span lang="EN-US">Hello all,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Could anyone help us with the averaging tracks.
<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">We got individual tracks, but we would like to make an average track file (tck) for a display purpose.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Preferably, we would like to show a color coded tracks indicating number of subjects which show common tracks as in FSL.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Hak<u></u><u></u></span></p>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><b><font color="#990000">Dr J-Donald Tournier (PhD)</font></b><br><div><font color="#990000"><br></font></div><i><font color="#990000">Senior Lecturer, </font></i><i><font color="#990000">Biomedical Engineering</font></i><div><i><font color="#990000">Division of Imaging Sciences & Biomedical Engineering<br>King's College London</font></i><div><i><font color="#990000"><br></font></i></div><div><i><font color="#990000"><b style="font-family:Calibri,sans-serif;font-size:15px"><span style="font-size:10pt">A:</span></b><span style="font-family:Calibri,sans-serif;font-size:10pt"> Department of Perinatal Imaging & Health, 1<sup>st</sup> Floor South Wing, St Thomas' Hospital, London. SE1 7EH</span><br></font></i></div><div><i><font color="#990000"><b>T:</b> +44 (0)20 7188 7118 ext 53613</font></i></div></div><div><i><font color="#990000"><b>W:</b> <a href="http://www.kcl.ac.uk/medicine/research/divisions/imaging/departments/biomedengineering" target="_blank">http://www.kcl.ac.uk/medicine/research/divisions/imaging/departments/biomedengineering</a></font></i><br></div></div></div>
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