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<p class="MsoNormal">Dear Gaters,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m trying to construct a hexagonal parallel hole collimator with the hexagone shape. But I want to rotate the hexagon about its radius, which makes repeating the geometry more complicated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have only managed to successfully repeat the geometry using a generic repeater – I tried linear, cubic array and quadrant, but no luck.<o:p></o:p></p>
<p class="MsoNormal">Also, I cannot find a way to repeat partial volumes at the collimator’s edges. This results in holes over-extending beyond my desired collimator geometry.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can anyone advise on a more efficient repeater method?<o:p></o:p></p>
<p class="MsoNormal">Is there a simple way to create partial holes at the collimator edge?<o:p></o:p></p>
<p class="MsoNormal">(see attached image for the generic repeater arrangement, green line is desired edge of collimator).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And here’s the hexagone specification:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">/gate/collimator/daughters/name hole<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">/gate/collimator/daughters/insert hexagone<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">/gate/hole/geometry/setHeight 10. mm<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">/gate/hole/geometry/setRadius 2. mm<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">/gate/hole/placement/setRotationAxis 0 0 1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">/gate/hole/placement/setRotationAngle 45 deg<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">/gate/hole/setMaterial Air<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for your help,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoPlainText"><span style="font-family:"Times New Roman","serif"">Alex Grimwood<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Times New Roman","serif"">--------------------------------------<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Times New Roman","serif""><a href="mailto:a.grimwood@nhs.net">a.grimwood@nhs.net</a><o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Times New Roman","serif"">Trainee Clinical Scientist<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Times New Roman","serif"">Royal Surrey County Hospital,<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Times New Roman","serif"">Guildford,<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Times New Roman","serif"">Surrey<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Times New Roman","serif"">GU2 7XX<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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