<div dir="ltr"><div><div><div><div><div>Hi, </div>Sorry for the confusion. I would encourage you to read the code but I'll try to answer: </div>1. the fluence actor inherits from GateVImageActor so this is the same as many other image actors, see, e.g., this <a href="http://wiki.opengatecollaboration.org/index.php/Users_Guide_V7.1:Readout_parameters_for_Radiotherapy_applications:_Actors#3D_matrix_actor_.28Image_actor.29">section of the wiki</a> </div>2. the actor has been developped for photon imaging and the goal of this option was to separate photons that had the same direction as the primary from those that had been scattered (see <a href="https://github.com/OpenGATE/Gate/blob/develop/source/digits_hits/src/GateFluenceActor.cc">line 296</a>). If enabled, the image of the scattered particles only is written. </div>3. You're right, entering would be more correct according to the comment<a href="https://github.com/OpenGATE/Gate/blob/develop/source/digits_hits/src/GateFluenceActor.cc"> line 236</a> </div>4. The name is not correct, it should be a GateCountActor indeed... but that should be easy to post process your result. I don't know if there is any other actor available for the fluence. <div><div>Simon </div></div></div><div class="gmail_extra"> <div class="gmail_quote">On Mon, Sep 14, 2015 at 12:24 PM, Anders Garpebring <<a href="mailto:anders.garpebring@umu.se" target="_blank">anders.garpebring@umu.se</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div link="#0563C1" vlink="#954F72" lang="EN-US"> <div> Dear Gate users, Can someone explain the fluence actor a bit more. Is there some more documentation than in the gate manual? Some specific questions: 1. If I use the command “setSize” will the image be centered around the center of the mother volume and have the physical size I specify? 2. What is meaning of enableScatter? Is it that scattered radiation is be counted too? For instance when radiation first pass through a pixel and then is scattered back through the pixel 3. In the gate documentation it says that each (new) particle passing a volume is counted. What does this mean? Shouldn’t one count all particles entering? 4. Counting particles entering a pixel is not a good way to measure fluence since the fluence become a function of the pixel geometry. Is this somehow compensated for? If not are there some more advanced fluence actor available? For instance one that is based on track length. Best, Anders </div> </div> _______________________________________________ Gate-users mailing list <a href="mailto:Gate-users@lists.opengatecollaboration.org">Gate-users@lists.opengatecollaboration.org</a> <a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users" rel="noreferrer" target="_blank">http://lists.opengatecollaboration.org/mailman/listinfo/gate-users</a> </blockquote></div> </div>