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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi Rob,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I’m using the syntax suggested in filter_tracks documentation:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:13.5pt;color:black">filter_tracks [ options ] input output</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></a></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">that is:
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">filter_tracks -invert -include
<i>my-combined-rois</i> <i>my-input-connectome</i> <i>output.tck</i><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">This is working, but it’s doing an AND operation rather than OR.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I also tried to use –include twice, once for each roi.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I don’t get any error, but no filtering is happening.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">For example, if my input connectome has 500k streamlines, the filtered output connectome will have 500k streamlines too.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Here is my syntax:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">filter_tracks
<i>my-intput-connectome</i> -include roi1 -include roi2 -invert <i>output.tck<o:p></o:p></i></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">or<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">filter_tracks -include roi1 -include roi2 -invert <i>my-intput-connectome</i>
<i>output.tck<o:p></o:p></i></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Is that working for you?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Am I doing something wrong/different?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Ilaria<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Robert Smith [mailto:robert.smith@florey.edu.au]
<br>
<b>Sent:</b> Monday, June 12, 2017 9:05 PM<br>
<b>To:</b> Ilaria Sani <isani01@rockefeller.edu><br>
<b>Cc:</b> mrtrix-discussion@www.nitrc.org<br>
<b>Subject:</b> Re: [Mrtrix-discussion] filter_tracks<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi <span style="font-size:9.5pt">Ilaria,</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">If you combine the two ROIs into a single image, then filter_tracks will treat that singular image as a single ROI, and<br>
hence operate on any track that touches any highlighted voxel in that image.<br>
This is why any track touching <i>either</i> of the two ROIs is being removed.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">In order to perform your desired operation (remove all tracks that touch both ROIs), you want to use the following:</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Courier New"">filter_tracks in.tck -include ROI1.mif -include ROI2.mif -invert out.tck</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">By providing the two ROIs separately to filter_tracks using separate -include options, you are specifying that you are</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">interested only in tracks that touch both ROIs. The -invert option then specifies that those streamlines elected by the</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">ROIs are to be <i>excluded</i> from the output, rather than being the only streamlines included in the output.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Cheers</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Rob</span><o:p></o:p></p>
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<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
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<p class="MsoNormal"><br>
--<br>
<br>
<b><span style="color:#FF6600">Robert Smith, Ph.D</span></b><span style="color:#FF6600"><br>
Senior Research Officer, Imaging Division</span><br>
<br>
The Florey Institute of Neuroscience and Mental Health<br>
Melbourne Brain Centre - Austin Campus<br>
245 Burgundy Street<br>
Heidelberg Vic 3084<br>
Ph: +61 3 9035 7128<br>
Fax: +61 3 9035 7301<br>
<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.florey.edu.au_&d=DwMFaQ&c=JeTkUgVztGMmhKYjxsy2rfoWYibK1YmxXez1G3oNStg&r=YP6hL_RiH1GzLni5-fQIc9iVR40St75EyTMGejOj-k4&m=Vu67mF4YNrX2iO4rwrovBrbhXAwd-oou9Cr88dECwo0&s=azRcMvKDTbK_t1OtNcmpCVjII20tAA99t5Sr3yu4Jq4&e=" target="_blank">www.florey.edu.au</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><i>MRtrix3</i>: Advanced tools for the analysis of diffusion MRI data<o:p></o:p></p>
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<p class="MsoNormal"><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.mrtrix.org_&d=DwMFaQ&c=JeTkUgVztGMmhKYjxsy2rfoWYibK1YmxXez1G3oNStg&r=YP6hL_RiH1GzLni5-fQIc9iVR40St75EyTMGejOj-k4&m=Vu67mF4YNrX2iO4rwrovBrbhXAwd-oou9Cr88dECwo0&s=hPkZWFiRlkAopMx3WsLeANC99YUEkTBc4tHENjhzZJg&e=" target="_blank">Website</a>
- <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.mrtrix.org_blog_&d=DwMFaQ&c=JeTkUgVztGMmhKYjxsy2rfoWYibK1YmxXez1G3oNStg&r=YP6hL_RiH1GzLni5-fQIc9iVR40St75EyTMGejOj-k4&m=Vu67mF4YNrX2iO4rwrovBrbhXAwd-oou9Cr88dECwo0&s=gEf4eHJ21qIW_lpQImNlPP8EdjUcCSia7-ecw-Hd0CY&e=" target="_blank">
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Community forum</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Jun 12, 2017 at 4:18 AM, Ilaria Sani <<a href="mailto:isani01@mail.rockefeller.edu" target="_blank">isani01@mail.rockefeller.edu</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Dear All,<br>
<br>
I'm using Mrtrix 0.2<br>
<br>
I would like to remove some specific tracks from my connectome. Specifically all the tracks between two ROIs.<br>
<br>
The closest thing I found is filter_tracks.<br>
The ROI I’m using is the combination of the two ROIs.<br>
However filter_tracks removes all the streamlines touching one OR the other ROI.<br>
<br>
Is there a way to select only the streamlines touching both?<br>
Alternatively, is there any other tool that removes tracks between two ROIs from the connectome?<br>
<br>
Thanks!!<br>
<br>
Ilaria<br>
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<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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