<div dir="ltr">Hi Alejandro,<div>for your setup with the plastic skull, these fiducials will work fine, just keep in mind not to have symmetric or collinear fiducial configurations. Furthermore, when you define the fiducial loci in the image data set don't aim for the center of the "nipples" since you can't pinpoint the center with the tracked pointer, instead choose a point on the surface. </div>
<div><br></div><div>Hope this helps,</div><div>Ozgur</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/10/16 Alejandro De León Cuevas <span dir="ltr"><<a href="mailto:a.deleon.cuevas@gmail.com" target="_blank">a.deleon.cuevas@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">



















<p><span><span lang="EN">Hi everybody,</span></span><span lang="EN"> <span>I have</span> <span>a question</span> that <span>I hope</span> <span>somebody there</span> <span>can</span>
<span>answer</span>. <span>I want to know</span> <span>what kind of</span> <span>fiducials</span> <span>are</span>
<span>best</span> <span>for image registration</span>, I will<span> use</span> it <span>on an</span> <span>artificial</span>
<span>skull</span> <span>and make the registration</span> procedure
<span>using IGSTK</span> <span>with</span> <span>DICOM</span> <span>images</span> <span>(</span>CT<span>)</span> <span>of the</span> <span>skull.</span> <span>I found</span> <span>skin</span> <span>markers</span>
<span>as</span> <span>shown</span> <span>in this
link</span>:</span></p>

<p><span lang="EN"> </span></p>

<p><span lang="EN"><a href="http://www.pdchealthcare.com/en-us/products/SDM-CT1.html" target="_blank">http://www.pdchealthcare.com/en-us/products/SDM-CT1.html</a></span></p>

<p><span lang="EN"> </span></p>

<p><span><span lang="EN">but I don’t know if</span></span><span lang="EN"> <span>they are</span> <span>optimal</span>. <span>Thank you for your</span> <span>attention.</span></span></p>






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*********************************************************************<br>Dr. Dipl.-Ing. Özgür Güler, Bakk. techn. PhD<br>Research Assistant<br>4D-Visualization Laboratory<br>Univ. ENT Clinic<br>Innsbruck Medical University<br>
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