<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear Léonie,<div class=""><br class=""></div><div class="">I don’t see what could be the problem. Maybe the .stl file is not properly defined or its material is different ?</div><div class="">Do you see any warnings from GATE when running with the tessellated volume ?</div><div class=""><br class=""></div><div class="">Kind regards,</div><div class=""> Maxime Chauvin<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 10 Oct 2018, at 14:32, Leonie Brodbek <<a href="mailto:leonie.brodbek@uni-oldenburg.de" class="">leonie.brodbek@uni-oldenburg.de</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div id="divtagdefaultwrapper" dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 12pt; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="Apple-interchange-newline">Hi all,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">we tried again to play around with the mesh structure but that did not change the results.</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">We changed the resolution of the mesh structure from 12 to 432 facets for a box geometry of 1 cm x 1 cm x 0.5 cm.<span class="Apple-converted-space"> </span><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">In our opinion, for a box geometry the mesh resolution will not have an impact so that is also what we expected.</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Furthermore we scored a sphere with R = 0.25 mm in a waterphantom in a proton beam and get good results comparable to yours. When we score in a cylinder, we get for the Gate geometry twice the value of the CAD geometry.<span class="Apple-converted-space"> </span><br class=""></div>We will keep on searching for a solution of our problem, if anybody has another idea we would be very thankful!</div><div dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 12pt; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 12pt; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Kind regards<span class="Apple-converted-space"> </span><br class=""></div><div dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 12pt; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Leonie</div><br style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 12pt; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 12pt; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><hr tabindex="-1" style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline-block; width: 711.46875px;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class=""></span><div id="divRplyFwdMsg" dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">Von:</b><span class="Apple-converted-space"> </span>Maikol Salas Ramirez <<a href="mailto:mmsalas@gmail.com" class="">mmsalas@gmail.com</a>><br class=""><b class="">Gesendet:</b><span class="Apple-converted-space"> </span>Montag, 8. Oktober 2018 15:21:29<br class=""><b class="">An:</b><span class="Apple-converted-space"> </span>Leonie Brodbek<br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span>Maxime Chauvin; gate-users<br class=""><b class="">Betreff:</b><span class="Apple-converted-space"> </span>Re: [Gate-users] Problems with scoring edep and dose in non rectangular geometries and CAD geometries</font><div class=""> </div></div><div style="caret-color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div dir="ltr" class=""><div class="">Hi all,</div><div class=""><br class=""></div><div class="">I did test (for my, this topic is very important), I put a cylinder (H=1mm, R=0.25mm) and a sphere (R=0.25mm) in a Lu-177 box 1m3 (images attached). The result are consistent:</div><div class=""><span class=""></span><table cellspacing="0" border="0" style="font-family: "Liberation Sans"; font-size: x-small;" class=""><colgroup width="148" class=""></colgroup><colgroup width="113" class=""></colgroup><colgroup width="131" class=""></colgroup><colgroup width="94" class=""></colgroup><tbody style="font-family: "Liberation Sans"; font-size: x-small;" class=""><tr style="font-family: "Liberation Sans"; font-size: x-small;" class=""><td height="17" align="left" style="font-family: "Liberation Sans"; font-size: x-small;" class=""><br class=""></td><td colspan="3" align="center" style="font-family: "Liberation Sans"; font-size: x-small;" class="">S-Value (mGy/Mbq-s)</td></tr><tr style="font-family: "Liberation Sans"; font-size: x-small;" class=""><td height="17" align="left" style="font-family: "Liberation Sans"; font-size: x-small;" class="">Geometry</td><td align="left" style="font-family: "Liberation Sans"; font-size: x-small;" class="">Cylinder (bone)</td><td align="left" style="font-family: "Liberation Sans"; font-size: x-small;" class="">Background (source)</td><td align="left" style="font-family: "Liberation Sans"; font-size: x-small;" class="">Sphere (fat)</td></tr><tr style="font-family: "Liberation Sans"; font-size: x-small;" class=""><td height="17" align="left" style="font-family: "Liberation Sans"; font-size: x-small;" class="">Solid</td><td align="right" style="font-family: "Liberation Sans"; font-size: x-small;" class="">9,07</td><td align="right" style="font-family: "Liberation Sans"; font-size: x-small;" class="">0,01</td><td align="right" style="font-family: "Liberation Sans"; font-size: x-small;" class="">10,18</td></tr><tr style="font-family: "Liberation Sans"; font-size: x-small;" class=""><td height="17" align="left" style="font-family: "Liberation Sans"; font-size: x-small;" class="">Mesh</td><td align="right" style="font-family: "Liberation Sans"; font-size: x-small;" class="">8,87</td><td align="right" style="font-family: "Liberation Sans"; font-size: x-small;" class="">0,01</td><td align="right" style="font-family: "Liberation Sans"; font-size: x-small;" class="">9,96</td></tr><tr style="font-family: "Liberation Sans"; font-size: x-small;" class=""><td height="17" align="left" style="font-family: "Liberation Sans"; font-size: x-small;" class="">%Error</td><td align="right" style="font-family: "Liberation Sans"; font-size: x-small;" class="">-2,15</td><td align="right" style="font-family: "Liberation Sans"; font-size: x-small;" class="">0,70</td><td align="right" style="font-family: "Liberation Sans"; font-size: x-small;" class="">-2,14</td></tr></tbody></table></div><div class=""><br class=""></div><div class="">For sure there is a small difference, but it comes from the surface triangulation in the mesh.</div><div class=""><br class=""></div><div class="">I calculated the deposited energy by the spectrum.<br class=""></div><div class=""><br class=""></div><div class="">It will be interesting to see under what conditions there is not consistency between the two geometrical approaches.<br class=""></div><div class=""><br class=""></div><div class="">Best regards</div><div class="">Maikol<br class=""></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="">El lun., 8 oct. 2018 a las 13:20, Maikol Salas Ramirez (<<a href="mailto:mmsalas@gmail.com" class="">mmsalas@gmail.com</a>>) escribió:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class="">Hi Leoni,<div class=""><br class=""></div><div class="">Just going back to this sentence "W<span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;" class="">hen 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</span>".</div><div class=""><br class=""></div><div class="">This difference can come from the "finish" of your mesh, it is important to remember that the mesh representation is not the same that the 3D volume with perfect curves. I would say that it is a good idea to play with the level of detail of the finish of the mesh surfaces. Also depending of the size of your geometries and if you are simulation electrons, you could have big differences, because electron are very sensible to this surface changes.</div><div class=""><br class=""></div><div class="">Best regards</div><div class="">Maikol</div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="">El lun., 8 oct. 2018 a las 12:36, Leonie Brodbek (<<a href="mailto:leonie.brodbek@uni-oldenburg.de" target="_blank" class="">leonie.brodbek@uni-oldenburg.de</a>>) escribió:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div style="word-wrap: break-word; line-break: after-white-space;" class=""><div id="m_3229437794552699469m_6760064267659526411divtagdefaultwrapper" dir="ltr" style="font-size: 12pt; font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">Dear Maxime,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Thank you!<span class="Apple-converted-space"> </span><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">U<span class="">nfortunately</span> we already checked this and it seems that both geometries fit well and that this does not cause the problem.</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Kind regards</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Leonie<br class=""></div></div><hr style="display: inline-block; width: 683.171875px;" class=""><div id="m_3229437794552699469m_6760064267659526411divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">Von:</b><span class="Apple-converted-space"> </span>Maxime Chauvin <<a href="mailto:maxime.chauvin@inserm.fr" target="_blank" class="">maxime.chauvin@inserm.fr</a>><br class=""><b class="">Gesendet:</b><span class="Apple-converted-space"> </span>Montag, 8. Oktober 2018 12:01:11<br class=""><b class="">An:</b><span class="Apple-converted-space"> </span>Leonie Brodbek<br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span>Elia Alessio;<span class="Apple-converted-space"> </span><a href="mailto:gate-users@lists.opengatecollaboration.org" target="_blank" class="">gate-users@lists.opengatecollaboration.org</a><br class=""><b class="">Betreff:</b><span class="Apple-converted-space"> </span>Re: [Gate-users] Problems with scoring edep and dose in non rectangular geometries and CAD geometries</font><div class=""> </div></div><div class="">Dear Léonie,<div class=""><br class=""></div><div class="">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.</div><div class=""><br class=""></div><div class="">As a rough check you can use the visualisation (Gate --qt) to see if your geometries are identical between your 2 simulations.<br class=""><div class=""><br class=""></div><div class="">Kind regards,</div><div class=""> Maxime Chauvin</div><div class=""><br class=""><blockquote type="cite" class=""><div class="">On 8 Oct 2018, at 11:26, Leonie Brodbek <<a href="mailto:leonie.brodbek@uni-oldenburg.de" target="_blank" class="">leonie.brodbek@uni-oldenburg.de</a>> wrote:</div><br class="m_3229437794552699469m_6760064267659526411Apple-interchange-newline"><div class=""><div id="m_3229437794552699469m_6760064267659526411divtagdefaultwrapper" dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none; font-size: 12pt; font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols;" class=""><div id="m_3229437794552699469m_6760064267659526411divtagdefaultwrapper" dir="ltr" style="font-size: 12pt; font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">Hi Alessio,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">thanks a lot!</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">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="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">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="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span><span class="">and the insert specification "tessellated</span>". We obtained the same behavior when scoring Edep in cylinders built in gate and with the help of a CAD programm.<span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Kind regards</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Leonie</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div></div><hr style="display: inline-block; width: 686px;" class=""><div id="m_3229437794552699469m_6760064267659526411divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">Von:</b><span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span>Elia Alessio <<a href="mailto:alessio.elia@medaustron.at" target="_blank" class="">alessio.elia@medaustron.at</a>><br class=""><b class="">Gesendet:</b><span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span>Montag, 8. Oktober 2018 10:58:37<br class=""><b class="">An:</b><span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span>Leonie Brodbek<br class=""><b class="">Cc:</b><span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span><a href="mailto:gate-users@lists.opengatecollaboration.org" target="_blank" class="">gate-users@lists.opengatecollaboration.org</a><br class=""><b class="">Betreff:</b><span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span>RE: Problems with scoring edep and dose in non rectangular geometries and CAD geometries</font><div class=""> </div></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Hi Leonie,<u class=""></u><u class=""></u></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><u class=""></u> <u class=""></u></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">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="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span><u class=""></u><u class=""></u></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><u class=""></u> <u class=""></u></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Hope it can help!<u class=""></u><u class=""></u></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><u class=""></u> <u class=""></u></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Best<u class=""></u><u class=""></u></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Alessio<u class=""></u><u class=""></u></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><u class=""></u> <u class=""></u></span></div><div class=""><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(225, 225, 225); padding: 3pt 0cm 0cm;" class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><b class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">From:</span></b><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span>Gate-users [<a href="mailto:gate-users-bounces@lists.opengatecollaboration.org" target="_blank" class="">mailto:gate-users-bounces@lists.opengatecollaboration.org</a>]<span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span><b class="">On Behalf Of<span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span></b>Leonie Brodbek<br class=""><b class="">Sent:</b><span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span>Montag, 08. Oktober 2018 10:31<br class=""><b class="">To:</b><span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span><a href="mailto:Gate-users@lists.opengatecollaboration.org" target="_blank" class="">Gate-users@lists.opengatecollaboration.org</a><br class=""><b class="">Subject:</b><span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span>[Gate-users] Problems with scoring edep and dose in non rectangular geometries and CAD geometries<u class=""></u><u class=""></u></span></div></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><u class=""></u> <u class=""></u></div><div id="m_3229437794552699469m_6760064267659526411divtagdefaultwrapper" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class="">Dear all,<u class=""></u><u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class=""><u class=""></u> <u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class="">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:<u class=""></u><u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class=""><u class=""></u> <u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class="">- 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).<u class=""></u><u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class=""><u class=""></u> <u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class="">- 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.<u class=""></u><u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class=""><u class=""></u> <u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class="">We would be very thankful for any help!<u class=""></u><u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class=""><u class=""></u> <u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class="">Kind regards<span class="m_3229437794552699469m_6760064267659526411Apple-converted-space"> </span><u class=""></u><u class=""></u></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-family: Calibri, sans-serif;" class="">Leonie Brodbek<u class=""></u><u class=""></u></span></div></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><small class=""><span class=""><u class=""></u><u class=""></u></span><b class=""><span lang="EN-GB" style="font-family: Verdana, sans-serif; color: rgb(17, 35, 89);" class="">Disclaimer:</span></b><br class=""><span lang="EN-GB" style="font-family: Verdana, sans-serif; color: rgb(17, 35, 89);" class="">Please notice our E-Mail Disclaimer <a href="http://www.medaustron.at/email-disclaimer/" id="m_3229437794552699469m_6760064267659526411LPlnk324406" target="_blank" style="color: rgb(5, 99, 193); 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