<div>Hi Lynn,</div><div> </div><div>You could use normalise_tracks to normalise your tractogram to a template prior to calculating the track-density image. Kerstin Pannek used this approach in her 2011 Neuroimage paper on average pathlength mapping ("The <span class="highlight">average</span> <span class="highlight">pathlength</span> <span class="highlight">map</span>: a diffusion MRI tractography-derived index for studying brain pathology.")</div>
<div> </div><div>Best regards,</div><div> </div><div>René<br></div><div class="gmail_quote">On Tue, May 29, 2012 at 3:51 PM, 李佩霖 <span dir="ltr"><<a href="mailto:lynnlee0226@gmail.com" target="_blank">lynnlee0226@gmail.com</a>></span> wrote:<br>
<blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid" class="gmail_quote">Hello,
<div><br></div><div>I have used MRtrix to produce track-density image for disease's study. </div><div>There is a problem if my subject has smaller brain, the tracking-density is increased due to the same track numbers used instead of due to pathological changes.</div>
<div>Would you please give me the instruction how to solve the problem?</div><div>Thank you for your help.</div><div><br></div><div>Best regards,</div><div>Lynn</div><div><h3><br></h3> </div>
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