<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Times New Roman; font-size: 12pt; color: #000000'>Hi Mahdjoub Hamdi,<div><br></div><div>how long are your simulations ? Because 10 Bq. have no sense without acquisition time. I think you have to choose longer acquisition time to have better statistic.</div><div><br></div><div>Matthieu.<br><br><div><span name="x"></span>---<br>Matthieu MOREAU, MSc<br>PhD student in Nuclear Imaging<br>CRCNA - UMR 892 - INSERM (France) // Ecole Nationale Vétérinaire de Nantes (France) ONIRIS - AMaROC - +33 (0) 2 40 68 40 05<span name="x"></span><br></div><br><hr id="zwchr"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>De: </b>"Mahdjoub Hamdi" <mahdjoub.hamdi@hotmail.fr><br><b>À: </b>gate-users@lists.opengatecollaboration.org<br><b>Envoyé: </b>Vendredi 27 Septembre 2013 18:03:47<br><b>Objet: </b>[Gate-users] Problem in the number of the emited positrons by F18 point source<br><br>
<title>Problem in the number of the emited positrons by F18 point source</title>
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<p dir="LTR"><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">D</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">ea</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">r all</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> Gate expert</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">s</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> and</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> users</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">,</font></span></p>
<p dir="LTR"><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">Le</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">t</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">’</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">s first</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">identify</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> the</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">problem</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">,</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">I need</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">to count the total number of</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">the</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> emitted</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">e+</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">by F18 source</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">. For that</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">I</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> have simulated</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">F18</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> point</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> source</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> placed in the center of water cylinder</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">.</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">T</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">he information about the number</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">of emitted events</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> is</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">ob</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">t</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">ained</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> by using Gate</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">in Tracker Mode</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">.</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">But the number of total emitted was not as specified by the comm</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">a</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">nd</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">: </font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">/gate/source/Source/setActivity</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">1</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">0 becquerel .</font></span></p>
<p dir="LTR"><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">As an example, for 10</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">becquerel</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> I obtain</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">ed</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">12 e+, 17</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">e+</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">, 6e+, 15</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">e+ when I repeat</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">ed</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">execut</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">ion of</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"> the same simulation</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">4 times always</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">with 10</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">becquerel</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">.</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="fr"></span><span lang="fr"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">And, if there is another way to track particles in the phantom</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en"> <font face="Calibri">I'll be</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en"> <font face="Calibri">Thankfu</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en"><font face="Calibri">l</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en"><font face="Calibri">.</font></span></p>
<p dir="LTR"><span lang="fr"></span><span lang="fr"></span><span lang="en"><font face="Calibri">Here</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en"><font face="Calibri"> is my macro for the source</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en"><font face="Calibri">:</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en"><font face="Calibri"></font></span><span lang="fr"></span><span lang="fr"></span><span lang="en"> </span></p>
<p dir="LTR"><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri"># SOURCE 1 #</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/addSource fluor18</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/setActivity 1</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">0</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">. becquerel</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/gps/particle ion</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/gps/ion 9 18 0 0 </font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/setForcedUnstableFlag true</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/useDefaultHalfLife</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/gps/energytype Mono</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/gps/monoenergy 0 MeV</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/gps/angtype iso</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/gps/number 1</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/gps/centre 0. 0. 0. cm</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">/gate/source/fluor18/gps/type Point</font></span></p>
<p dir="LTR"><span lang="fr"></span><span lang="fr"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Thank you in</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"> <font face="Calibri">advance</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"><font face="Calibri">.</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Mahdjoub</font></span><span lang="fr"></span><span lang="fr"></span><span lang="en-us"></span></p>
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