Hi Jeong,<br><br><div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal">I wonder the order of fiber directions saved in the output file of "find_SH_peaks".</p>
<p class="MsoNormal">This is what I did:</p><p class="MsoNormal">gendir 100 dir100.txt</p><p class="MsoNormal">find_SH_peak CSD8.mif dir100.txt SH_peaks_CSD8.mif</p><p class="MsoNormal"> </p><p class="MsoNormal">The output file consists of 9 different 3-D volumes. </p>
<p class="MsoNormal">Which ones are for X, Y, Z to indicate the direction of the 1st fiber ?</p><p class="MsoNormal">I am guessing the first three volumes indicates the X, Y, Z of the first vector, next three indicates those of the second vector, and so on.</p>
<p class="MsoNormal">Is it correct? </p></div></div></blockquote><div><br></div><div>Yes, this is correct. Also, the norm of each of these X,Y,Z vectors provides the amplitude of the FOD along the corresponding peak direction.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal">Also, I would like to know whether 100 directions are good enough to estimate the directions of three fibers.</p>
</div></div></blockquote><div><br></div><div>Yes, that's more than enough. In my experience, 60 is already enough for lmax 8.</div><div> </div><div>Cheers,</div><div><br></div><div>Donald.</div><div><br></div><div><br>
</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Jacques-Donald Tournier (PhD)<br>Brain Research Institute, Melbourne, Australia<br>Tel: +61 (0)3 9496 4078<br>
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