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Hi Josh,</div>
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<br>
</div>
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There are a couple options for simulating gamma emissions from Tc-99m. One of which uses the ion source:</div>
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<span>/gate/source/ [ source name ] /gps/particle ion</span></div>
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<div>/gate/source/<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span> </span>[ source name ]<span> </span></span>/gps/ion 43 99 0 142.6832</div>
</div>
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<div>/gate/source/<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span> </span>[ source name ]<span> </span></span>/setForcedUnstableFlag true</div>
</div>
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<span>/gate/source/<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span> </span>[ source name ]<span> </span></span>/useDefaultHalfLife</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span>/gate/source/<span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif"> </span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">[ source name ]</span><span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif"> </span>/setActivity
10 MBq<br>
</span></div>
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<span><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span>An alternative and speedier option, if you are not concerned about dosimetry within your source volume, would be to use a gamma source defined in the UserSpectrum:</span></div>
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<span>/gate/source/<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span> </span>[ source name ]<span> </span></span>/gps/particle gamma</span></div>
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<span><span>/gate/source/<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span> </span>[ source name ]<span> </span></span>/gps/energytype UserSpectrum</span></span></div>
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<span>
<div>/gate/source/<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span> </span>[ source name ]<span> </span></span>/gps/setSpectrumFile data/energy_spectrum_Tc99m.txt</div>
</span></div>
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<span><span>/gate/source/<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span> </span>[ source name ]<span> </span></span>/setForcedHalfLife 21625.848 s</span></span></div>
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<span><span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">/gate/source/</span><span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255)"> </span><span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">[
source name ]</span><span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255)"> </span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">/setActivity
8.85244 MBq</span><br>
</span></span></div>
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span><span>Here, your energy spectrum file would look like:</span></span></div>
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<span><span><span># Gamma spectrum for Technetium 99m from LNE-LNHB/CEA Table de Radionucleides</span></span></span></div>
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<span><span>
<div># (first line is 1 0 to say it is a discrete spectrum)</div>
</span></span></div>
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<span><span>
<div># Three next lines : 89.6 keV, 140.511 keV, and 142.675 KeV</div>
</span></span></div>
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<span><span>
<div>1 0</div>
</span></span></div>
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<span><span>
<div>0.0896 0.000014</div>
</span></span></div>
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<span><span>
<div>0.140511 0.885</div>
</span></span></div>
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<span><span><span>0.142675 0.00023</span></span></span></div>
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<span><span>
<div></div>
</span></span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">Both configurations above would simulate a 10 MBq Tc-99m source. </span>In the former case, you would set your activity as desired.
In the latter case, you would scale your activity by the sum of all branching ratios to account only for the gamma portion of radioactivity.</font>
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<div><font color="#000000" face="Calibri, Arial, Helvetica, sans-serif">Cheers,</font></div>
<div><font color="#000000" face="Calibri, Arial, Helvetica, sans-serif">Matthew<br>
</font>
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<span><span><span></span><span></span><br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Gate-users <gate-users-bounces@lists.opengatecollaboration.org> on behalf of Josh Knowland <jknowland@lucernodynamics.com><br>
<b>Sent:</b> May 26, 2020 10:35 AM<br>
<b>To:</b> Christopher Watanabe <ge69kec@mytum.de>; gate-users@lists.opengatecollaboration.org <gate-users@lists.opengatecollaboration.org><br>
<b>Subject:</b> Re: [Gate-users] GATE 7 metastable source definition</font>
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<span style="font-weight:bold; font-size:12px">CAUTION:</span> The Sender of this email is not from within Dalhousie.</div>
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Gate Users,</p>
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Is there any update on this? Simulation of Tc99m without going through Mo-99 decay?</p>
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What is the best practice for this situation?</p>
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-josh</p>
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<b>From:</b> Gate-users <gate-users-bounces@lists.opengatecollaboration.org> <b>On Behalf Of
</b>Christopher Watanabe<br>
<b>Sent:</b> Thursday, January 30, 2020 3:53 PM<br>
<b>To:</b> gate-users@lists.opengatecollaboration.org<br>
<b>Subject:</b> Re: [Gate-users] GATE 7 metastable source definition</p>
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Hi all, <br>
<br>
I was wondering, given that the original post here was 5 years ago, whether methods now exist for simulating the metastable Tc99m, without simulating the Mo-99 decay scheme. This, for a Tc99m SPECT imaging simulation.<br>
<br>
I realize in the GATE examples, this is simulated using a pure gamma, but I’m interested in checking the dose, minimal though it may be, of tissue as well.
<br>
<br>
Thank you! <br>
<br>
Chris<br>
<br>
/----------------------------------------------------------------------------------------------------------</p>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Hi,</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">you should take Mo-99, i.e. Z=42, A=99 instead, since Tc-99m</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">is part of the Mo-99 decay scheme. I have just tried it with</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">the Spectro-example of EduGATE and it gives a useful spectrum!</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Also, if you use the physicslist mechanism for the physical processes you need to add:</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">/gate/physics/addPhysicsList emstandard</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">/gate/physics/addProcess RadioactiveDecay</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Hope this is helpful for you!</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Kind regards,</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Uwe Pietrzyk</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">/----------------------------------------------------------------------</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Prof. Dr. Uwe Pietrzyk</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Diplom-Physiker</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Institut für Neurowissenschaften und Medizin / INM-4</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Forschungszentrum Jülich GmbH</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">52425 Jülich</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Tel: +49-2461-61 4763</pre>
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<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Mobil: +49-162-103-4871</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">eMail: <a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users">U.Pietrzyk at fz-juelich.de</a><mailto:<a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users">U.Pietrzyk at fz-juelich.de</a>></pre>
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<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">&</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Bergische Universität Wuppertal</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Fachbereich C - Physik / D.08.01</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Gaußstr. 20</pre>
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<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">eMail: <a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users">Uwe.Pietrzyk at physik.uni-wuppertal.de</a><mailto:<a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users">Uwe.Pietrzyk at physik.uni-wuppertal.de</a>></pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"><a href="http://www.medizinphysik.uni-wuppertal.de%3chttp:/www.medizinphysik.uni-wuppertal.de/">http://www.medizinphysik.uni-wuppertal.de<http://www.medizinphysik.uni-wuppertal.de/</a>></pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">----------------------------------------------------------------------/</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">On 30 Jan 2015, at 21:17, Xinchi Hou <<a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users">monicaxinchi at gmail.com</a><mailto:<a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users">monicaxinchi at gmail.com</a>>> wrote:</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Dear Gate-users,</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">I am using GATE 7 for SPECT simulations. For some reason, GATE 7 seems can not recognize metastable source by defining an ion source (shows below,Tc-99m as an example), which can be successfully run by GATE 6.1:</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">/gate/source/SourceTC99m/gps/particle ion</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">/gate/source/SourceTC99m/gps/ion 43 99 0 142.6833</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">/gate/source/SourceTC99m/gps/monoenergy 0 keV</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">/gate/source/SourceTC99m/setForcedUnstableFlag true</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">/gate/source/SourceTC99m/setForcedHalfLife 21640 s</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">I know we can define 140keV gamma as a source instead of using ion source. However, I need to use many of other metastable isotopes as sources which usually have multiple gamma energies for each of them.</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">I really appreciate if somebody could share his/her experience on similar problems.</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";"> </pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">My best regards,</pre>
<pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";">Monica</pre>
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