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<p>Dear Sir,</p>
<p>Thanks for the information. Please, I was using the acquisition protocol</p>
<p></p>
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: </div>
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<div>/gate/application/setTimeStart 0. s</div>
<div>/gate/application/setTimeSlice 1 s</div>
<div>/gate/application/setTimeStop 10. s</div>
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/gate/application/start</div>
For dosimetry in CT where I have employed helical scanning in my simulation. Because I wanted to measure dose for different Timestop say 10 s, 30 s or 50 s at fixed TimeSlice to verify how the setTimeStop has an influence on the dose. That made me had the same
results. <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;"> I will use your first suggested option and report the
feedback later. However, I am not sure which of the option is ideal for my case.</span>
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<div><span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, "Segoe UI", "Segoe WP", Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;">First</span><br>
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<div>/gate/application/setTimeStart 0. s</div>
<div>/gate/application/setTimeSlice 1 s</div>
<div>/gate/application/setTimeStop 10. s</div>
</div>
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/gate/application/start<span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, "Segoe UI", "Segoe WP", Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;">DAQ</span></div>
Thanks.
<p></p>
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</div>
<div>Best regards,</div>
<div>Emmanuel Marfo</div>
</div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> David Sarrut <David.Sarrut@creatis.insa-lyon.fr><br>
<b>Sent:</b> Tuesday, 22 August 2017 7:11:46 p.m.<br>
<b>To:</b> Emmanuel Marfo<br>
<b>Cc:</b> gate-users@lists.opengatecollaboration.org<br>
<b>Subject:</b> Re: [Gate-users] SetTimeStop vs Dose(mGy)</font>
<div> </div>
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<div>
<div dir="ltr">Hello,
<div><br>
</div>
<div>there are two ways to start a simulation:</div>
<div><br>
</div>
<div>First: </div>
<div>
<div>/gate/application/setTimeStart 0. s</div>
<div>/gate/application/setTimeSlice 1 s</div>
<div>/gate/application/setTimeStop 10. s</div>
</div>
<div>
<div>/gate/application/startDAQ</div>
</div>
<div><br>
</div>
<div>Will create 10 runs of 1 sec. The number of generated primary particules will depend on the source activity (for example 1MBq, will launch 1M particles every run). </div>
<div><br>
</div>
<div>Second :</div>
<div>
<div>/gate/application/setTotalNumberOfPrimaries 10000</div>
</div>
<div>
<div>/gate/application/start</div>
</div>
<div><br>
</div>
<div>In that case, 10000 particles will be generated, time is not explicit. Under the hood, Gate create a "fake" time structure of a single slice, starting at 0, ending at 1 sec, every particle being timestamp at 1/10000 sec. </div>
<div><br>
</div>
<div>HTH, </div>
<div>David</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Aug 21, 2017 at 11:41 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">
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<div id="m_8699266991653388766divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif" dir="ltr">
<p>Hi GATE users,</p>
<p>Please, can someone help me to understand how the acquisition parameters such as Timeslice, TimeStart and TimeStop in GATE actually work? I learnt is equivalent to real time experiment. Currently, at constant Timeslice say 0.26 s, I vary the TimeStop say
30 60, 90 s etc. I expected my dose(mGy) values to increase but the dose(mGy) actually remain the same. Is it a bug in my simulation making me to get the same results or I am wrongly implementing the acquisition parameters. Thanks.</p>
<p><br>
</p>
<p>Best regards,</p>
<p>Emmanuel Marfo</p>
<p>Student</p>
<p>University of Otago</p>
</div>
</div>
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-- <br>
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<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">David Sarrut, Phd<br>
Directeur de recherche CNRS<br>
CREATIS, UMR CNRS 5220, Inserm U1206
<div>Centre de lutte contre le cancer Léon Bérard<br>
28 rue Laënnec, 69373 Lyon cedex 08<br>
Tel : 04 78 78 51 51 / 06 74 72 05 42<br>
<a href="http://www.creatis.insa-lyon.fr/~dsarrut" target="_blank">http://www.creatis.insa-lyon.fr/~dsarrut</a><br>
_________________________________</div>
<div> "2 + 2 = 5, for extremely large values of 2"<br>
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