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<p class="MsoNormal"><span style="color:#1F497D">Hi<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I have found something strange and hope you may be able to help. I have a phase space for a position below the linac head and I have used this as the source for a phantom dose measurement in PRIMO (PENELOPE variant)
to get a depth dose which matches our water tank data. But when I use this in Gate (simple geometry, 1m air and 40 cm water) I get a much larger depth dose, dmax is the same though. I even get the same results using penEasy (another PENELOPE variant).I would
be very grateful for any ideas.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><img width="624" height="368" id="_x0000_i1026" src="cid:image001.png@01D56403.1457B730" alt="cid:image004.png@01D563CE.94066EC0"></span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Regards.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="mso-fareast-language:EN-GB">James Murphy<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Trainee Medical Physicist<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Radiotherapy Physics<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Sunrise Centre<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Royal Cornwall Hospitals Trust<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Truro<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Cornwall <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">TR1 3LJ<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Wingdings 2";mso-fareast-language:EN-GB">'</span><span style="mso-fareast-language:EN-GB"> 01872 25 8321/8320<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="mso-fareast-language:EN-GB"> Ext 8321/8320<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:Wingdings;mso-fareast-language:EN-GB">*</span></b><b><span style="font-size:8.0pt;mso-fareast-language:EN-GB">
</span></b><b><u><span style="mso-fareast-language:EN-GB"><a href="mailto:james.murphy18@nhs.net"><span style="color:blue">james.murphy18@nhs.net</span></a></span></u></b><u><span style="font-family:"Arial","sans-serif";mso-fareast-language:EN-GB"><o:p></o:p></span></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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