[Gate-users] Variance Reduction Technique on GATE v6...

[Park MinJae]

Dear Thibault,

Yes, It's obviously GATE v6 p01 :)


Anyway, let me clarify my question.

What I want to know is...

1) Is there any other VRTs like forced detection on GATE v6?

2) Is it possible to use VRTs simultaneously?

When I use following two commands...
/gate/physics/processes/PhotoElectric/activateSplitting gamma 100
/gate/physics/processes/PhotoElectric/activateRussianRoulette gamma 50

I got the messange like this.
src/GateVProcessMessenger.cc (l.126): Splitting or Russian Roulette
already activate for the process PhotoElectric.

C++ source of GATE is below:
if(( command==pSetSplit || command==pSetRussianR) &&
pProcess->GetIsWrapperActive())
   GateError("Splitting or Russian Roulette already activate for the
process "<<pProcess->GetG4ProcessName()  <<".");

There is "or" between Split and RussianR.


Cordially yours,
MJ

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On Wed, Jun 23, 2010 at 5:19 AM, Thibault Frisson
<frisson at creatis.insa-lyon.fr> wrote:
> Hi,
>
>
>> 1) is there those two implemented VRTs on ROOT v6.0 p01?
>
> yes (I think you want to say "GATE v6.0 p01")
>
>
>> I saw there is the other VTR on CT projector, which is not NM.
>>
>> I saw Beenhouwer's paper which described two VRTs and enhanced about 5
>> times.
>> On the Staelens's paper, they are working on the forced detection.
>>
>> I guess...Using filter could be an option to enhance the speed.
>> but it's not primary VRTs, right?
>>
>
> Not sure to understand your question. Filters are used to improve the
> efficiency of splitting or russian roulette.
>
>
>> 2) Is it working on the other process except Bremsstrahlung?
>
> yes, it should work for all processes.
>
>
> Best regards,
>
> Thibault
>
> --
> Thibault Frisson, Phd
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>
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