<div dir="ltr">Hi Nick !<div><br></div><div>First, the IAEA format is not the primary file format for phase-space. Some times ago, bugs were reported for this format. It should now be corrected in develop version, but other limitations still probably exist (I do not use it, so cannot guide you). I recommend to use root file format instead. </div><div><br></div><div>Second, yes the output is in Gy, not in Gy/primary. While it could be natural for radiotherapy applications, DoseActor are used in other applications where the primary is not necessarily meaningful. For RT applications, you can just for example add a SimulationStatistics actor and look for the number of primaries that have been simulated to normalize, nothing complicated here. </div><div><br></div><div>David</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Dec 28, 2015 at 6:12 PM, REYNAERT NICK <span dir="ltr"><<a href="mailto:n-reynaert@o-lambret.fr" target="_blank">n-reynaert@o-lambret.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I've recently started using Gate for radiotherapy applications. There is something that I don't really understand regarding the usage of phase-space files.<br>
First of all when a phase-space file is generated in IAEA format, the number of primary histories is not correctly written in the .IAEAheader file. Obviously this can be corrected manually. But when a phantom calculation uses this phase-space file as a source, this info does not seem to be used and the dose is wrongly (or not at all) normalized.<br>
The output is in Gy, instead of the more conventional Gy/primary_history. The fact that a history is a primary is saved in the phase-space file and this info is normally used by a MC engine to normalize the dose correctly (this is e.g. the case in Gamos as well). I think this is mandatory if the Monte Carlo system is going to be used for absolute treatment plan validation. So I was wondering if I have overlooked something, or how others perform this normalization in Gate ?<br>
<br>
Many thanks in advance !!!<br>
<br>
Nick<br>
<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr">David Sarrut, Phd<br>Directeur de recherche CNRS<br>CREATIS, UMR CNRS 5220, Inserm U 1044<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>_________________________________</div></div></div>
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