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David, thank you for the detailed answer! Very helpful.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Gate-users <gate-users-bounces@lists.opengatecollaboration.org> on behalf of David Boersma <david.boersma@acmit.at><br>
<b>Sent:</b> Thursday, August 1, 2019 5:09:28 AM<br>
<b>To:</b> gate-users@lists.opengatecollaboration.org <gate-users@lists.opengatecollaboration.org><br>
<b>Subject:</b> Re: [Gate-users] Dose Uncertainty</font>
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<p>Hello Josh,</p>
<p><br>
</p>
<p>Ideally you would find answers to such questions in our documentation. In our old docs ...:</p>
<p><a href="http://wiki.opengatecollaboration.org/index.php/Users_Guide:Tools_to_Interact_with_the_Simulation_:_Actors#Dose_measurement_.28DoseActor.29" id="LPlnk793767" style="color: rgb(5, 99, 193); text-decoration: underline;" previewremoved="true">http://wiki.opengatecollaboration.org/index.php/Users_Guide:Tools_to_Interact_with_the_Simulation_:_Actors#Dose_measurement_.28DoseActor.29</a></p>
<p><br>
</p>
<p>... and in the new (same text, different format) docs ...:</p>
<p><a href="https://opengate.readthedocs.io/en/latest/tools_to_interact_with_the_simulation_actors.html#dose-measurement-doseactor" class="OWAAutoLink" id="LPlnk632834" previewremoved="true">https://opengate.readthedocs.io/en/latest/tools_to_interact_with_the_simulation_actors.html#dose-measurement-doseactor</a></p>
<p><br>
</p>
<p>... it just says "<span>The uncertainty is the relative statistical uncertainty.</span>" In other words, the error is unit-less, the value <span style="font-family:Consolas; color:black">0.001135445931</span> in your example means that the relative uncertainty
(standard deviation divided by the value) is 0.11%.</p>
<p><br>
</p>
<p>For calculating this relative uncertainty, the "DoseActor" code actually computes the ratio of the "standard deviation of the dose per primary" and the "dose per primary". So in addition to the "dose" (sums of doses due to each successive primary) and "dosesquare"
(sum of squares of doses due to each successive primary), the number of primaries is a necessary ingredient of the calculation. Especially if you want to compute the combined uncertainty of several simulations. For the full monty read Chetty 2006, DOI: 10.1016/j.ijrobp.2006.03.039.
<span>😊</span></p>
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<p>Hope that helps,</p>
<p>David<br>
<span></span></p>
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<div dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>Von:</b> Gate-users <gate-users-bounces@lists.opengatecollaboration.org> im Auftrag von Josh Knowland <jknowland@lucernodynamics.com><br>
<b>Gesendet:</b> Mittwoch, 31. Juli 2019 16:26:38<br>
<b>An:</b> gate-users@lists.opengatecollaboration.org<br>
<b>Betreff:</b> [Gate-users] Dose Uncertainty</font>
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All – good morning,</p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
How can I interpret the dose-uncertainty output from Gate? I have Dose, Dose-Squared, and Dose-Uncertainty text files, but what units are the uncertainty number?</p>
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Dose</p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black">####################################
</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># Matrix Size= (10,10,10)</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># Resol = (1,1,1)</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># VoxelSize = (10,10,10)</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># nbVal = 1</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black">####################################
</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black">2.879146507e-05</span></p>
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<span style="font-family:Consolas; color:black"> </span></p>
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<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
Dose-Squared</p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black">####################################
</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># Matrix Size= (10,10,10)</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># Resol = (1,1,1)</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># VoxelSize = (10,10,10)</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># nbVal = 1</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black">####################################
</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black">3.463765531e-15</span></p>
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<span style="font-family:Consolas; color:black"> </span></p>
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Dose-Uncertainty</p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black">####################################
</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># Matrix Size= (10,10,10)</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># Resol = (1,1,1)</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># VoxelSize = (10,10,10)</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black"># nbVal = 1</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black">####################################
</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: "Calibri", sans-serif;">
<span style="font-family:Consolas; color:black">0.001135445931</span></p>
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<span style="font-family:Consolas; color:black"> </span></p>
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