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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi Clemens,<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">The HU builder is only “active” if you explicitly add it in your macro AND you actually use its output.<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">The only thing the HU builder does is to compute new conversion tables (HU to material, and a corresponding material database) and to store these into text files.
The builder does *<b>not</b>* load the built material database file into “the” Gate material database. See e.g. GateContrib/dosimetry/Radiotherapy/example3/mac/target-CT.mac:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">the “generator” lines are “activating” the HU builder, which writes the two specified text files.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">with the “setMaterialDatabase” and the “setHUToMaterialFile” the user actively uses HU builder output.
<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">So, no the builder is not active by default. It sounds like that in your case you should just write your own “materials.db” and “HU2-mat.txt” text files, do not
use the HU builder for that.<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">HTH,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">DavidB<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" style="margin-left:.5in"><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"> Gate-users [mailto:gate-users-bounces@lists.opengatecollaboration.org]
<b>On Behalf Of </b>C S<br>
<b>Sent:</b> Monday, April 16, 2018 10:32 AM<br>
<b>To:</b> gate-users <gate-users@lists.opengatecollaboration.org><br>
<b>Subject:</b> [Gate-users] GateHounsfieldToMaterialsBuilder active by default?<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Dear fellow Gate users,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">I only recently stumbled upon the GateHounsfieldToMaterialsBuilder when looking through github issues:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><a href="https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FOpenGATE%2FGate%2Fissues%2F37&data=02%7C01%7Cdavid.boersma%40medaustron.at%7C89051d1a12254d937c7e08d5a374cd87%7Cadb749e06dfd4f6fbea8cd9f8e0c9b89%7C0%7C0%7C636594644424873518&sdata=AxJ5MeRrhzlTEr3yjeq9lLFQNSQj6dK3P2iWx4k1gc8%3D&reserved=0">https://github.com/OpenGATE/Gate/issues/37</a><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><b>Is this builder active by default? </b><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><u>Context:</u><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">I use FixedForcedDetection in Gate7.2 with discrete materials. I segment my volumes outside of Gate and with one number per material for encoding them. So my
<span style="font-family:"Courier New"">hu2mat.txt</span> looks like<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-family:"Courier New"">-5 5 Air</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-family:"Courier New"">5 15 Adipose</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-family:"Courier New"">15 25 Bone</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-family:"Arial",sans-serif">and my volume only has three discrete values 0, 10 or 20 representing the materials. In short,
<b>I don't want the builder to be active. </b>(as far as I understand it)</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-family:"Arial",sans-serif">Thank you for your help!</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Best<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Clemens<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal"><small><span style=""><o:p></o:p></span><b><span style="font-family: "Verdana","sans-serif"; color: rgb(17, 35, 89);" lang="EN-GB">Disclaimer:</span></b><br>
<span style="font-family: "Verdana","sans-serif"; color: rgb(17, 35, 89);" lang="EN-GB">Please notice our E-Mail Disclaimer <a href="http://www.medaustron.at/email-disclaimer/"><span style="color: rgb(17, 35, 89);">http://www.medaustron.at/email-disclaimer/</span></a></span></small><span style=""><o:p></o:p></span><o:p> </o:p></p>
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