[Gate-users] Help on Varying Tube current(mAs) using Spekcalc Spectrum

Tue Jul 25 10:31:58 CEST 2017

Hello, 

Regarding the histogram in Gate, we have to insert the number of photons
per kev per cm2 per mAs or the Probability of Photons per keV? 

I would like to measure the dose in a Cylinder phantom that is placed at
60 cm from the source. How can I correct the photons for the different
distance? 

Kind Regards, 

Theodora 

Στις 2017-07-25 10:37,
gate-users-request at lists.opengatecollaboration.org έγραψε: 

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> Today's Topics:
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> 1. GATE v8.0 compilation instructions - clarifications? (Edwin Leung)
> 2. Fw: Help on Varying Tube current(mAs) using Spekcalc Spectrum
> (Emmanuel Marfo)
> 3. Σχετ: Problem about using GPU in GATE
> (Konstantinos P. Chatzipapas, MSc)
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 24 Jul 2017 11:23:54 -0700
> From: Edwin Leung <ekleung at ucdavis.edu>
> To: gate-users at lists.opengatecollaboration.org
> Subject: [Gate-users] GATE v8.0 compilation instructions -
> clarifications?
> Message-ID:
> <CAFW7GwEspJ=X5eDGmu1SyD7-5-AnbTm7NHEM+P64QdyWkQg6Ag at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
> 
> Hi all,
> 
> I'm in the process of compiling and validating GATE v8.0 and I notice there
> were some changes in the documentation and I have some questions:
> 
> 1. ITK is now listed as *required *in the *Package Required *section
> (http://wiki.opengatecollaboration.org/index.php/ [2]
> Compilation_Instructions_V8.0). Is it *actually *required - *or *can I just
> keep the ITK compilation flag *off *when compiling GATE v8.0? I didn't have
> any compilation error when the flag was turned off so I wanted to double
> check that was okay.
> 
> 2. The *Geant4* section states that GEANT4_INSTALL_DATA and
> *GEANT4_USE_SYSTEM_CLHEP* are *mandatory*, which appears to contradict with
> the earlier statement from the *CLHEP* section "Since the GATE V7.0
> release, users can use the CLHEP embedded within each Geant4 distribution.
> This case, the CMAKE flag GEANT4_USE_SYSTEM_CLHEP, which is OFF by default,
> must stay OFF." Can I keep GEANT4_USE_SYSTEM_CLHEP *off*? Again there were
> no compilation error so I would like to make sure I installed GATE
> correctly.
> 
> Many thanks,
> 
> Ed
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> ------------------------------
> 
> Message: 2
> Date: Mon, 24 Jul 2017 21:31:14 +0000
> From: Emmanuel Marfo <emmanuel.marfo at postgrad.otago.ac.nz>
> To: "gate-users at lists.opengatecollaboration.org"
> <gate-users at lists.opengatecollaboration.org>
> Subject: [Gate-users] Fw: Help on Varying Tube current(mAs) using
> Spekcalc Spectrum
> Message-ID:
> <SY3PR01MB15610A65067CBBDA84E45FE5F7BB0 at SY3PR01MB1561.ausprd01.prod.outlook.com>
> 
> Content-Type: text/plain; charset="iso-8859-1"
> 
> ________________________________
> From: Emmanuel Marfo
> Sent: Monday, 24 July 2017 4:13 p.m.
> To: Simon Rit
> Subject: Re: [Gate-users] Help on Varying Tube current(mAs) using Spekcalc Spectrum
> 
> Dear Sir,
> 
> Please, From what you said I understand the number of particles to be Histories in my simulation and I also know 1mAs =6.25*10^15 electrons which are probably a number of particles for 1mAs.
> 
> The number of particles = Histories. however, I know increasing the number of histories decreases the statistical uncertainty in the simulation. This is where I get confused. Please, Sir I really need help on this part. Is there any article or simple illustration that can guide me. Thanks.
> 
> Best regards,
> 
> Emmanuel Marfo
> 
> Student
> 
> ________________________________
> From: simon.rit at gmail.com <simon.rit at gmail.com> on behalf of Simon Rit <simon.rit at creatis.insa-lyon.fr>
> Sent: Monday, 10 July 2017 6:50:49 a.m.
> To: Emmanuel Marfo
> Cc: gate-users at lists.opengatecollaboration.org
> Subject: Re: [Gate-users] Help on Varying Tube current(mAs) using Spekcalc Spectrum
> 
> Hi,
> The mAs is adjusted by setting the number of particles in your Gate simulation. SpekCalc provides a spectrum in number of photons per kev per cm2 per mAs @ 1 meter. So depending on your geometry, you can deduce a corresponding number of particles to simulate in Gate.
> Simon
> 
> On Sat, Jul 8, 2017 at 10:54 AM, Emmanuel Marfo <emmanuel.marfo at postgrad.otago.ac.nz<mailto:emmanuel.marfo at postgrad.otago.ac.nz>> wrote:
> 
> Dear Gate-Users,
> 
> Please, does anyone has an idea how I could adjust tube current(mAs) in GATE using Spekcalc energy spectrum as the source. Any help will be deeply appreciated. Thanks.
> 
> Cheers,
> 
> Emmanuel Marfo
> 
> University of Otago
> 
> Student
> 
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> ------------------------------
> 
> Message: 3
> Date: Tue, 25 Jul 2017 07:37:07 +0000 (UTC)
> From: "Konstantinos P. Chatzipapas, MSc" <konhat88 at yahoo.gr>
> To: 鲁家豪 <lumc321.phys at buaa.edu.cn>,
> "gate-users at lists.opengatecollaboration.org"
> <gate-users at lists.opengatecollaboration.org>
> Subject: [Gate-users] Σχετ: Problem about using GPU in GATE
> Message-ID: <1682989843.151009.1500968227920 at mail.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
> 
> Hello Jiahao,
> Which version of Ubuntu do you use?
> Kind regards,Konstantinos ----------------------------------------------------- Konstantinos Chatzipapas
> Medical Physicist, MSc
> University of Patras
> web page: Physics Magazine 
> 
> Στις 12:17 μ.μ. Δευτέρα, 24 Ιουλίου 2017, ο/η 鲁家豪 <lumc321.phys at buaa.edu.cn> έγραψε:
> 
> Hi Gate-users,
> 
> I am trying to use GPU computing in GATE, following this instruction: https://help.ubuntu.com/community/Cuda [5]. I installed CUDA toolkit 8.0 instead.
> While doing the compilation of SDK, after the command "LINKFLAGS=-L/usr/lib/nvidia-375/ make cuda-install=/opt/cuda", I got the errors as the attached screen-shot shows. By the way, "没有那个文件或目录" means "no such file or directory".
> Could anyone help me to fix it, please?
> 
> Many thanks,
> Jiahao
> 
> _______________________________________________
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