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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Dear Leonie,
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">…and what about any overlapping problem in your imported geometry. Did you check that?
<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Best<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Alessio<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Leonie Brodbek [mailto:leonie.brodbek@uni-oldenburg.de]
<br>
<b>Sent:</b> Montag, 08. Oktober 2018 12:35<br>
<b>To:</b> Maxime Chauvin <maxime.chauvin@inserm.fr><br>
<b>Cc:</b> Elia Alessio <alessio.elia@medaustron.at>; gate-users@lists.opengatecollaboration.org<br>
<b>Subject:</b> AW: [Gate-users] Problems with scoring edep and dose in non rectangular geometries and CAD geometries<o:p></o:p></span></p>
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<p><span style="font-family:"Calibri",sans-serif;color:black">Dear Maxime,<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Thank you! <o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Unfortunately we already checked this and it seems that both geometries fit well and that this does not cause the problem.<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Kind regards<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Leonie<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Von:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> Maxime Chauvin <<a href="mailto:maxime.chauvin@inserm.fr">maxime.chauvin@inserm.fr</a>><br>
<b>Gesendet:</b> Montag, 8. Oktober 2018 12:01:11<br>
<b>An:</b> Leonie Brodbek<br>
<b>Cc:</b> Elia Alessio; <a href="mailto:gate-users@lists.opengatecollaboration.org">
gate-users@lists.opengatecollaboration.org</a><br>
<b>Betreff:</b> Re: [Gate-users] Problems with scoring edep and dose in non rectangular geometries and CAD geometries</span>
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<p class="MsoNormal">Dear Léonie, <o:p></o:p></p>
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<p class="MsoNormal">something you could check is the position of the geometry. Importing a .stl file can result in a unwanted shift due to a different reference frame from CAD compared to how GATE build a box or a cylinder. And this can cause a difference
in Edep and absorbed dose.<o:p></o:p></p>
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<p class="MsoNormal">As a rough check you can use the visualisation (Gate --qt) to see if your geometries are identical between your 2 simulations.<o:p></o:p></p>
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<p class="MsoNormal">Kind regards,<o:p></o:p></p>
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<p class="MsoNormal"> Maxime Chauvin<o:p></o:p></p>
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<p class="MsoNormal">On 8 Oct 2018, at 11:26, Leonie Brodbek <<a href="mailto:leonie.brodbek@uni-oldenburg.de">leonie.brodbek@uni-oldenburg.de</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Hi Alessio,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">thanks a lot!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">We tried to create geometries with a CAD program to import more complex geometries and tested it with scoring in a box that is built inside Gate and with the same geometry built in the CAD
program.<span class="apple-converted-space"> </span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">When scoring edep we obtain a value of about 3000 MeV in the geometry built with Gate, when scoring in the CAD geometry we obtain a value of about 370 MeV. We imported the CAD geometries via
a .stl file<span class="apple-converted-space"> </span>and the insert specification "tessellated". We obtained the same behavior when scoring Edep in cylinders built in gate and with the help of a CAD programm.<span class="apple-converted-space"> </span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Kind regards<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Leonie<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Von:</span></b><span class="apple-converted-space"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Elia
Alessio <<a href="mailto:alessio.elia@medaustron.at">alessio.elia@medaustron.at</a>><br>
<b>Gesendet:</b><span class="apple-converted-space"> </span>Montag, 8. Oktober 2018 10:58:37<br>
<b>An:</b><span class="apple-converted-space"> </span>Leonie Brodbek<br>
<b>Cc:</b><span class="apple-converted-space"> </span><a href="mailto:gate-users@lists.opengatecollaboration.org">gate-users@lists.opengatecollaboration.org</a><br>
<b>Betreff:</b><span class="apple-converted-space"> </span>RE: Problems with scoring edep and dose in non rectangular geometries and CAD geometries</span><span style="font-family:"Calibri",sans-serif">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi Leonie,</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">thanks for your email. Concerning the first point you spotted could you be more precise? (for example what do you mean with “different results with
different order of magnitude”?). With respect to the second point, this is a known behavior of the dose actor. At the moment, it cannot handle correctly non-regular geometries as far as I know. I would recommend you to work with the edep and then post-process
the dose.<span class="apple-converted-space"> </span></span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hope it can help!</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Best</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Alessio</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span class="apple-converted-space"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Gate-users
[<a href="mailto:gate-users-bounces@lists.opengatecollaboration.org">mailto:gate-users-bounces@lists.opengatecollaboration.org</a>]<span class="apple-converted-space"> </span><b>On Behalf Of<span class="apple-converted-space"> </span></b>Leonie Brodbek<br>
<b>Sent:</b><span class="apple-converted-space"> </span>Montag, 08. Oktober 2018 10:31<br>
<b>To:</b><span class="apple-converted-space"> </span><a href="mailto:Gate-users@lists.opengatecollaboration.org">Gate-users@lists.opengatecollaboration.org</a><br>
<b>Subject:</b><span class="apple-converted-space"> </span>[Gate-users] Problems with scoring edep and dose in non rectangular geometries and CAD geometries</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Dear all,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">we try to perform simulations of different detectors with Gate and have some problems when scoring dose and edep in different volumes, perhaps anyone can help us with these issues:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">- When we score dose and edep in a gate constructed geometry and in the same CAD geometry we obtain different results with different orders of magnitude (even in rectangular geometries).<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">- When we score dose and edep in non rectangular geometries we cannot recalculate the dose out of edep and it seems that the dose in Gate is calculated by a geometry surrounding the real geometry
but having rectangular corners, e.g. for a sphere of radius 0.5 cm the dose can be recalculated out of edep by a cube with side length 1 cm.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">We would be very thankful for any help!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Kind regards<span class="apple-converted-space"> </span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Leonie Brodbek<o:p></o:p></span></p>
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