<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1525893344158_3137"><span id="yui_3_16_0_ym19_1_1525893344158_3146">Hello Sara and Nicolas,</span></div><div id="yui_3_16_0_ym19_1_1525893344158_3137"><span><br></span></div><div id="yui_3_16_0_ym19_1_1525893344158_3137"><span id="yui_3_16_0_ym19_1_1525893344158_15021">I can see that your innerCylinder1 is not daughter of your TubeSource2. This way Forbid, cannot locate it.</span></div><div id="yui_3_16_0_ym19_1_1525893344158_3137"><br></div><div id="yui_3_16_0_ym19_1_1525893344158_3137" dir="ltr">Try to make innerCylinder1 daughter of the TubeSource2. Moreover, at the beginning, create a big enough source, in order to be able to tell for sure that innerCylinder1 irradiates or not. </div><div id="yui_3_16_0_ym19_1_1525893344158_3137" dir="ltr"><br></div><div id="yui_3_16_0_ym19_1_1525893344158_3137" dir="ltr">Kind regards,</div><div id="yui_3_16_0_ym19_1_1525893344158_3137" dir="ltr">Konstantinos</div><div id="yui_3_16_0_ym19_1_1525893344158_3137" dir="ltr"><br></div><div id="yui_3_16_0_ym19_1_1525893344158_3137" dir="ltr">P.S.: I hope that you use an updated version of GATE (>7.2).</div><div></div><div id="yui_3_16_0_ym19_1_1525893344158_3138"> </div><div class="signature" id="yui_3_16_0_ym19_1_1525893344158_3141"><div style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;" id="yui_3_16_0_ym19_1_1525893344158_3140"><span style="font-style:italic;" id="yui_3_16_0_ym19_1_1525893344158_3139">-----------------------------------------------------</span></div><span style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;font-style:italic;" id="yui_3_16_0_ym19_1_1525893344158_3145"> Konstantinos Chatzipapas<br> Medical Physicist, </span><span style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;font-style:italic;">MSc<br></span><div style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;" id="yui_3_16_0_ym19_1_1525893344158_15028"><div id="yui_3_16_0_ym19_1_1525893344158_15027"><span style="font-style:italic;"> <span style="font-weight:bold;">University of Patras</span></span></div><div id="yui_3_16_0_ym19_1_1525893344158_15275"><div id="yui_3_16_0_ym19_1_1525893344158_15274"><span style="font-style:italic;"><br></span></div><div id="yui_3_16_0_ym19_1_1525893344158_15278"><span style="font-style:italic;" id="yui_3_16_0_ym19_1_1525893344158_15277"><span class="Apple-tab-span" style="white-space:pre;"> </span> web page:<span class="Apple-converted-space"> </span><a rel="nofollow" target="_blank" href="http://www.physicsmag.com/" id="yui_3_16_0_ym19_1_1525893344158_15276">Physics Magazine</a></span></div></div></div></div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> Στις 9:05 μ.μ. Τετάρτη, 9 Μαΐου 2018, ο/η Nicolas Karakatsanis <nicolas.karakatsanis@gmail.com> έγραψε:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv9696366376"><div dir="ltr">Dear <div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;display:inline;">GATE users</div>,<br><br><div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;">On behalf of my colleague, Dr. Sara Zein, I am forwarding you her question below. </div><div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;">
<div class="yiv9696366376gmail_default" style="color:rgb(34,34,34);font-size:small;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-color:initial;font-family:tahoma, sans-serif;display:inline;">We</div><span style="color:rgb(34,34,34);font-family:arial, sans-serif;font-size:small;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-color:initial;float:none;display:inline;"> would appreciate any help from the GATE community.</span>
</div><br><div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;display:inline;">We would like</div> to simulate a cylindrical radioactive source having a hollow center without activity. <div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;display:inline;">We are</div> using the cold source command "Forbid" on the region <div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;display:inline;">we wish</div> to exclude from <div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;display:inline;">our</div> source. However the background activity from the larger source still persists. <div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;display:inline;"></div><div>Below you <div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;display:inline;">may</div> find <div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;display:inline;">our</div> code.<br><br>/gate/source/addSource TubeSource1<br>/gate/source/TubeSource1/gps/type Volume<br>/gate/source/TubeSource1/gps/shape Cylinder<br>/gate/source/TubeSource1/gps/radius 3.0 cm<br>/gate/source/TubeSource1/gps/halfz 3.0 cm<br>/gate/source/TubeSource1/setActivity 2000000 becquerel #### to be specified<br>/gate/source/TubeSource1/gps/particle e+<br>/gate/source/TubeSource1/setForcedUnstableFlag true<br>/gate/source/TubeSource1/gps/energytype Fluor18<br>/gate/source/TubeSource1/setForcedHalfLife 6586.2 s<br>/gate/source/TubeSource1/gps/angtype iso<br>/gate/source/TubeSource1/gps/centre 0. 0. 0 cm<br><br>/gate/world/daughters/name innerCylinder1<br>/gate/world/daughters/insert cylinder<br>/gate/innerCylinder1/placement/setTranslation 0.0 0.0 0.0 cm<br>/gate/innerCylinder1/geometry/setRmax 1.5 cm<br>/gate/innerCylinder1/geometry/setHeight 6.0 cm<br>/gate/innerCylinder1/setMaterial Water<br>/gate/innerCylinder1/vis/forceWireframe<br>/gate/innerCylinder1/vis/setColor blue<br><br>/gate/source/addSource TubeSource2<br>/gate/source/TubeSource2/gps/type Volume<br>/gate/source/TubeSource2/gps/shape Cylinder<br>/gate/source/TubeSource2/gps/radius 1.5 cm<br>/gate/source/TubeSource2/gps/halfz 3 cm<br>/gate/source/TubeSource2/setActivity 2000000 becquerel #### to be specified<br>/gate/source/TubeSource2/gps/particle gamma<br>/gate/source/TubeSource2/gps/monoenergy 511. keV<br>/gate/source/TubeSource2/gps/angtype iso<br>/gate/source/TubeSource2/gps/centre 0. 0. 0 cm<br>/gate/source/TubeSource2/gps/Forbid innerCylinder1<br>/gate/source/TubeSource2/dump 1<br>/gate/source/list<br> <br><br>Thank you<div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;display:inline;"> in advance</div>,<br>Regards</div><div><div class="yiv9696366376gmail_default" style="font-family:tahoma, sans-serif;">Sara Zein</div><br><div><br><div><div class="yiv9696366376gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><a rel="nofollow" name="UNIQUE_ID_SafeHtmlFilter_UNIQUE_ID_SafeHtmlFilter__MailAutoSig" href=""><b><span style="font-size:10.0pt;font-family:sans-serif;color:#e87722;">Nikolaos (Nicolas) A.</span></b></a><span style="font-size:10pt;font-family:Helvetica, sans-serif;color:black;"> </span><b><span style="font-size:10.0pt;font-family:sans-serif;color:#e87722;">Karakatsanis, PhD, DABSNM</span></b><span style="font-size:9pt;font-family:Helvetica, sans-serif;color:black;"> </span><span style="font-size:9.0pt;font-family:sans-serif;color:black;"><br>
</span><span style="font-size:9.0pt;font-family:sans-serif;color:#777777;">Assistant Professor
of Biomedical Engineering in Radiology</span><span style="font-size:9pt;font-family:Helvetica, sans-serif;color:black;"> </span><span style="font-size:9.0pt;font-family:sans-serif;color:black;"><br>
</span><span style="font-size:9.0pt;font-family:sans-serif;color:#777777;">Weill
Cornell Medical College<br>
</span><span style="font-size:9.0pt;font-family:sans-serif;color:black;"><br>
</span><b><span style="font-size:10.0pt;font-family:sans-serif;color:#cf4520;">Weill Cornell Medicine</span></b><span style="font-size:9pt;font-family:Arial, sans-serif;color:black;"> </span><span style="font-size:9.0pt;font-family:sans-serif;color:black;"><br>
</span><span style="font-size:9.0pt;font-family:sans-serif;color:#777777;">Division
of Radiopharmaceutical Sciences, Department of Radiology</span><span style="font-size:9pt;font-family:Arial, sans-serif;color:black;"> </span><span style="font-size:9.0pt;font-family:sans-serif;color:black;"><br>
</span><span style="font-size:9.0pt;font-family:sans-serif;color:#777777;">515 East
71st Street, S-120</span><span style="font-size:9pt;font-family:Arial, sans-serif;color:black;">, </span><span style="font-size:9.0pt;font-family:sans-serif;color:#777777;">New York, NY</span><span style="font-size:9pt;font-family:Arial, sans-serif;color:black;"> </span><span style="font-size:9.0pt;font-family:sans-serif;color:#777777;">10021</span><span style="font-size:9.0pt;font-family:sans-serif;color:black;"><br>
</span><span style="font-size:9.0pt;font-family:sans-serif;color:#0563c1;"><a rel="nofollow" ymailto="mailto:nak2032@med.cornell.edu" target="_blank" href="mailto:nak2032@med.cornell.edu">nak2032@med.cornell.edu</a> </span><span style="font-size:9.0pt;font-family:sans-serif;color:#777777;"></span></div></div><div dir="ltr"><span style="font-size:12px;color:rgb(119,119,119);font-family:Arial;"></span></div></div></div></div></div></div></div></div></div>
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