<div dir="ltr"><div><div>Ok. Interesting, the match is not that bad. You think there is an energy offset based on the peaks I assume. The peaks are the fluorescence from the anode material. You can check what their position should be in theory and find which of the two plots is not correctly aligned.<br></div>Best regards,<br></div>Simon<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Oct 11, 2017 at 10:29 AM, Emmanuel Marfo <span dir="ltr"><<a href="mailto:emmanuel.marfo@postgrad.otago.ac.nz" target="_blank">emmanuel.marfo@postgrad.otago.ac.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div id="m_1294539770629561703divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif" dir="ltr">
<p>Please, in my simulation. I modelled the anode(rectangular geometry with thickness 1mm and cathode(source type: plane and shape: circle, source energy: monoenergetic electron(120keV)<wbr>), filters(aluminium and copper), all according to the specification of
our x-ray manual. I was able to generate an x-ray energy spectrum from this setup. I used both Penelope and emstandard_opt3 which apparently gives similar results.</p>
<p><br>
</p>
<p>Secondly, I used the same parameters in SpekCalc program. A program for calculating x-ray energy spectrum. I, therefore, compared the two spectra as a way of validating my spectrum from GATE. This gives the results of the image attached. If you need more
info please let me know. Thanks</p>
</div>
<hr style="display:inline-block;width:98%">
<div id="m_1294539770629561703divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> <a href="mailto:simon.rit@gmail.com" target="_blank">simon.rit@gmail.com</a> <<a href="mailto:simon.rit@gmail.com" target="_blank">simon.rit@gmail.com</a>> on behalf of Simon Rit <<a href="mailto:simon.rit@creatis.insa-lyon.fr" target="_blank">simon.rit@creatis.insa-lyon.<wbr>fr</a>><br>
<b>Sent:</b> Wednesday, 11 October 2017 7:38:45 p.m.<br>
<b>To:</b> Emmanuel Marfo<br>
<b>Cc:</b> <a href="mailto:gate-users@lists.opengatecollaboration.org" target="_blank">gate-users@lists.<wbr>opengatecollaboration.org</a><br>
<b>Subject:</b> Re: [Gate-users] SpekCalc vs GATE x-ray energy spectrum</font>
<div> </div>
</div><div><div class="h5">
<div>
<div dir="ltr">
<div>
<div>
<div>Hi,<br>
</div>
I am not sure I understand what we are looking at. What was the x-ray source in your Gate simulation? I think it would help to have the full simulation.<br>
</div>
Best regards,<br>
</div>
Simon<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Oct 11, 2017 at 3:47 AM, Emmanuel Marfo <span dir="ltr">
<<a href="mailto:emmanuel.marfo@postgrad.otago.ac.nz" target="_blank">emmanuel.marfo@postgrad.<wbr>otago.ac.nz</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div id="m_1294539770629561703m_-158833260913910576divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif" dir="ltr">
<p>Hi GATE users,</p>
<p>Find attached file 'SpekCalc vs GATE x-ray energy spectrum' which compares the two spectrums. My problem is the GATE characteristics spectrum is shifted to the right a bit when compared to the characteristics energy spectrum from SpekCalc. Please, I want
to know how I can make it align with that of spekcalc. I used the energyspectrum actor definition below</p>
<p></p>
<div>### E N E R G Y S P E C T R U M ######</div>
<div>##############################<wbr>########</div>
<div>/gate/actor/addActor EnergySpectrumActor espectrum</div>
<div>/gate/actor/espectrum/attachTo phantom</div>
<div>/gate/actor/espectrum/save Desktop/PHDthesisGATE/MARFO201<wbr>7/ModellingX-raytube/XraytubeC<wbr>U/output/cylinderespectrum.<wbr>root</div>
<div>/gate/actor/espectrum/addFilte<wbr>r particleFilter</div>
<div>/gate/actor/espectrum/particle<wbr>Filter/addParticle gamma</div>
<div>/gate/actor/espectrum/energySp<wbr>ectrum/setEmin 0 eV</div>
<div>/gate/actor/espectrum/energySp<wbr>ectrum/setEmax 0.12 MeV</div>
<div>/gate/actor/espectrum/energySp<wbr>ectrum/setNumberOfBins 120</div>
<div>/gate/actor/espectrum/energyLo<wbr>ssHisto/setEmin 0 eV</div>
<div>/gate/actor/espectrum/energyLo<wbr>ssHisto/setEmax 0.12 MeV</div>
<div>/gate/actor/espectrum/energyLo<wbr>ssHisto/setNumberOfBins 120</div>
<div><br>
</div>
Thanks
<p></p>
<p>Best regards,</p>
<p>Emmanuel Marfo</p>
<p>University of Otago</p>
<p>Student </p>
</div>
</div>
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</blockquote>
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</blockquote></div><br></div>