[Gate-users] max number of particles problem
Dimitrios Thanasas
dthanas at uoa.gr
Wed Sep 18 10:12:36 CEST 2019
Hi Emilie,
Thanks for your answer. I tried it and it didn't work.
I don't produce output files with singles (or hits) events.
I use only dose actors, so the output file contains dose or/and energy
deposited.
It seems it doesn't work with Actors.
I found a solution using activity and time to produce more than 2 billion
particles.
Thanks again,
Dimitris
> Hi Dimitri,
>
>
> To bypass the 2GB file size the command line is:
>
> /gate/output/ascii/setOutFileSizeLimit 0
>
>
> The zero at the end of the line implies an unlimited file size (validated
> with GATE v7.0/7.2/8.0/8.1). This restriction is true for ascii/binary
> output.
>
> If you don't need the ascii, you can use the root output. It provides all
> the information needed with a significantly lower file size than asciis.
>
>
> Emilie
>
>
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> Today's Topics:
>
> 1. max number of particles problem (Dimitrios Thanasas)
> 2. Change orientation of cone volume (Christopher Watanabe)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 13 Sep 2019 14:49:09 +0300
> From: "Dimitrios Thanasas" <dthanas at uoa.gr>
> To: gate-users at lists.opengatecollaboration.org
> Subject: [Gate-users] max number of particles problem
> Message-ID:
> <0688552fc89d96ae9de4a83d7fc9a96d.squirrel at webmail01.uoa.gr>
> Content-Type: text/plain;charset=utf-8
>
> Hi everyone,
>
> I noticed that the simulation doesn't proceed when I use more than 2E+9
> particles. Does anyone know how I can use more than 2 billion particles?
> I found the command "/gate/output/ascii(binary)/setOutFileSizeLimit" at
> the User's Guide but it doesn't work.
> Moreover I don't want ascii files as I use dose actors for dose
> calculations and I want many particles to reduce the dose uncertainty.
>
> Thanks in advance,
> Dimitris Thanasas
>
>
>
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 13 Sep 2019 15:10:38 +0200
> From: Christopher Watanabe <chris.r.watanabe at gmail.com>
> To: gate-users at lists.opengatecollaboration.org
> Subject: [Gate-users] Change orientation of cone volume
> Message-ID:
> <CAKsu_TbQWJkc-Mu05088LH8K=OTTjJZE0oOyAKwEOgT_VUVt2Q at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi everyone,
>
> I'm trying to create a pinhole collimater. So far, I have everything set
> up
> well, but the orientation is wrong with the preexisting orientation of the
> camera. (i.e. the primary axis of the pinhole should be the normal of the
> pixel grid)
>
> The code I have now is:
>
> ## Volume at the front of the spect device for the collimator
>
> /gate/front/daughters/name collimator
> /gate/front/daughters/insert box
> /gate/collimator/geometry/setXLength 44. mm
> /gate/collimator/geometry/setYLength 11.14 mm
> /gate/collimator/geometry/setZLength 44. mm
> /gate/collimator/placement/setTranslation 0. -0.2 0. mm
> /gate/collimator/setMaterial Air
>
> # Square of tungsten with correct thickness at the wider base (crystal
> side)
> /gate/collimator/daughters/name base
> /gate/collimator/daughters/insert box
> /gate/base/geometry/setXLength 44. mm
> /gate/base/geometry/setYLength 1 mm
> /gate/base/geometry/setZLength 44. mm
> /gate/base/placement/setTranslation 0. -0.2 0. mm
> /gate/base/setMaterial Tungsten
>
> # Cone of tungsten for collimation
> /gate/collimator/daughters/name Tcone
> /gate/collimator/daughters/insert cone
> /gate/Tcone/geometry/setRmin1 0 mm
> /gate/Tcone/geometry/setRmax1 3 mm
> /gate/Tcone/geometry/setRmin2 0 mm
> /gate/Tcone/geometry/setRmax2 25 mm
> /gate/Tcone/geometry/setHeight 11.14 mm
> /gate/Tcone/placement/setTranslation 0. -0.2 0. mm
> /gate/Tcone/setMaterial Tungsten
>
> # Cone of Air within the cone of tungsten
> /gate/Tcone/daughters/name hole2
> /gate/Tcone/daughters/insert cone
> /gate/hole2/geometry/setRmin1 0 mm
> /gate/hole2/geometry/setRmax1 2 mm
> /gate/hole2/geometry/setRmin2 0 mm
> /gate/hole2/geometry/setRmax2 24 mm
> /gate/hole2/geometry/setHeight 11.14 mm
> /gate/hole2/placement/setTranslation 0. -0.2 0. mm
>
> So, basically, the hollow tungsten cone should be within the air volume
> allocate for the collimator. The primary axis of the cone is along the z
> direction though, so I get the following visualization:
>
> [image: image.png]
> As you can see, the solid red cone (pinhole) is oriented along the z-axis,
> whereas the rest of the SPECT device is oriented along the y axis...
>
> Things I've tried:
> /gate/Tcone/placement/alignToY - This command just centers it along the y
> axis. Doesn't change the primary axis.
> /gate/Tcone/placement/setRotationAxis +
> /gate/Tcone/placement/setRotationAngle - Also doesn't yield any helpful
> changes.
>
> I'd appreciate any help!
>
> Cheers!
>
> Chris
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