[Gate-users] SpekCalc vs GATE x-ray energy spectrum

Simon Rit simon.rit at creatis.insa-lyon.fr
Wed Oct 11 10:41:28 CEST 2017

Ok. Interesting, the match is not that bad. You think there is an energy
offset based on the peaks I assume. The peaks are the fluorescence from the
anode material. You can check what their position should be in theory and
find which of the two plots is not correctly aligned.
Best regards,

On Wed, Oct 11, 2017 at 10:29 AM, Emmanuel Marfo <
emmanuel.marfo at postgrad.otago.ac.nz> wrote:

> Please, in my simulation. I modelled the anode(rectangular geometry with
> thickness 1mm and cathode(source type: plane and shape: circle, source
> energy: monoenergetic electron(120keV)), filters(aluminium and copper),
> all according to the specification of our x-ray manual. I was able to
> generate an x-ray energy spectrum from this setup. I used both Penelope and
> emstandard_opt3 which apparently gives similar results.
> Secondly, I used the same parameters in SpekCalc program. A program for
> calculating x-ray energy spectrum. I, therefore, compared the two spectra
> as a way of validating my spectrum from GATE. This gives the results of the
> image attached. If you need more info please let me know. Thanks
> ------------------------------
> *From:* simon.rit at gmail.com <simon.rit at gmail.com> on behalf of Simon Rit <
> simon.rit at creatis.insa-lyon.fr>
> *Sent:* Wednesday, 11 October 2017 7:38:45 p.m.
> *To:* Emmanuel Marfo
> *Cc:* gate-users at lists.opengatecollaboration.org
> *Subject:* Re: [Gate-users] SpekCalc vs GATE x-ray energy spectrum
> Hi,
> I am not sure I understand what we are looking at. What was the x-ray
> source in your Gate simulation? I think it would help to have the full
> simulation.
> Best regards,
> Simon
> On Wed, Oct 11, 2017 at 3:47 AM, Emmanuel Marfo <emmanuel.marfo at postgrad.
> otago.ac.nz> wrote:
>> Hi GATE users,
>> Find attached file 'SpekCalc vs GATE x-ray energy spectrum' which
>> compares the two spectrums. My problem is the  GATE characteristics
>> spectrum is shifted to the right a bit when compared to the characteristics
>> energy spectrum from SpekCalc. Please, I want to know how I can make it
>> align with that of spekcalc. I used the energyspectrum actor definition
>> below
>> ### E N E R G Y S P E C T R U M ######
>> ######################################
>> /gate/actor/addActor             EnergySpectrumActor espectrum
>> /gate/actor/espectrum/attachTo   phantom
>> /gate/actor/espectrum/save     Desktop/PHDthesisGATE/MARFO201
>> 7/ModellingX-raytube/XraytubeCU/output/cylinderespectrum.root
>> /gate/actor/espectrum/addFilter particleFilter
>> /gate/actor/espectrum/particleFilter/addParticle gamma
>> /gate/actor/espectrum/energySpectrum/setEmin           0 eV
>> /gate/actor/espectrum/energySpectrum/setEmax           0.12 MeV
>> /gate/actor/espectrum/energySpectrum/setNumberOfBins   120
>> /gate/actor/espectrum/energyLossHisto/setEmin          0 eV
>> /gate/actor/espectrum/energyLossHisto/setEmax          0.12 MeV
>> /gate/actor/espectrum/energyLossHisto/setNumberOfBins  120
>> Thanks
>> Best regards,
>> Emmanuel Marfo
>> University of Otago
>> Student
>> _______________________________________________
>> Gate-users mailing list
>> Gate-users at lists.opengatecollaboration.org
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