[Gate-users] Fluence Actor

[Triltsch, Nicolas]

Hey Simon,

----1----

Now I have time to pick up this topic. Honestly, I didn't really 
understand your reply. I see that GateScatterOrderTrackInformation.hh is 
a package which is included in the GateFluenceActor.cc file. I thought 
by setting mSeparateProcessFilename='scatter' in that file, I might get 
the different *rayleigh* and *compton scatter images*, because it states 
in lines 182-200:

|/* Printing compton or rayleigh or fluorescence scatter images */
# # if (*mSeparateProcessFilename* != "")
# {
# /* Saving separately process images (e.g. Compton, Rayleigh...) */
# std::map<G4String, GateImage*>::iterator it = mProcesses.end();
# for (unsigned int i = 0; i < mProcessName.size(); i++)
# {
# it = mProcesses.find(mProcessName[i]);
# if (it != mProcesses.end())
# {
# std::stringstream filenamestream;
# filenamestream << mSeparateProcessFilename << "_" << mProcessName[i] << 
".mhd";
# sprintf(filename, filenamestream.str().c_str(), rID);
# mProcesses[mProcessName[i]]->Write((G4String) filename);
# }
# it = mProcesses.end();
# }
# }
# }
|

But that didn't seem to work out. What can I do to get the separate 
scatter images? Or am I supposed to use the 
GateScatterOrderTrackInformationActor to obtain that information. I am 
stuck here, as the .cc scripting is quite difficult to understand for me.

---2---

Is there a way to obtain the*flatfield* with the Fluence Actor while 
simulating with a phantom? I need the flatfield to normalize the images 
later. What I am doing right now, I remove the phantom and start the 
simulation again. It works, but takes two times the simulation time and 
I have to run the script twice.


Thanks again and have a good day!

Nico



On 11/21/2016 07:48 AM, Simon Rit wrote:
> Hi,
> I think that this is meant to be used in combination with 
> GateScatterOrderTrackInformation. Every time an interaction occurs in 
> the volume to which GateScatterOrderTrackInformation is attached, this 
> information will be added to a user structure of the particle track. 
> When recording the fluence with the GateFluenceActor, it will check 
> the same structure of the particle and record the particle in separate 
> images. This has been developped to measure the amount of Compton vs 
> Rayleigh scatter and I think it currently works for photons only since 
> only Compton, Rayleigh and Fluorescence are tracked.
> I hope this helps,
> Simon
>
> On Sat, Nov 19, 2016 at 7:17 PM, Triltsch, Nicolas 
> <nicolas.triltsch at tum.de <mailto:nicolas.triltsch at tum.de>> wrote:
>
>     Hi everyone,
>
>     I really enjoy this support, as it was a great help so far. A new
>     question poped up my mind when dealing with the so called
>     FluenceActor.
>
>     As it is written in the Wiki, the option enableScatter prints out
>     the .mhd image for scattering. I assume that Compton and Rayleigh
>     scatter are combined here. But it should be possible to get the
>     two scatter images separate using the command
>     //gate/actor/DetectorFluence/separateProcessFilename/. In the Wiki
>     it says to do the following:
>
>     "Set the file name for the different scatter x-rays processes that
>     hit the detector (printf format with runId as a single parameter)"
>
>     But I don't understand that! Any help would be great?
>
>     Cheers,
>
>     Nico
>
>
>
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