[Gate-users] No difference in output with different Davis LUT surface setting (이승은)

Mariele Stockhoff Mariele.Stockhoff at UGent.be
Wed Feb 26 09:09:16 CET 2020

Dear Seungeun,

Please check when starting the simulation if you see something similar than this:

LUT DAVIS - data file: /data/gent/.../Detector_LUT.dat read in!
Reflectivity LUT DAVIS - data file: /data/gent/.../Detector_LUTR.dat read in!

If not, then Gate cannot find and access the LUTs. Check the directories.
If yes, good sign! Maybe then you should try defining both, the surface outside-crystal & crystal outside. Just to make sure you defined the correct one.

If you still have problems please share more details.

Best wishes and good luck,

On 26 Feb 2020, at 02:43, gate-users-request at lists.opengatecollaboration.org<mailto:gate-users-request at lists.opengatecollaboration.org> wrote:

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Today's Topics:

  1. Hounsfield text file (Eng. M Pharaon)
  2. No difference in output with different Davis LUT surface
     setting (이승은)


Message: 1
Date: Tue, 25 Feb 2020 17:06:25 +0000
From: "Eng. M Pharaon" <pharaon_m at hotmail.com>
To: Gate Email <gate-users at lists.opengatecollaboration.org>
Subject: [Gate-users] Hounsfield text file
<MWHPR14MB1295003055938D22A2B5B3C596ED0 at MWHPR14MB1295.namprd14.prod.outlook.com>

Content-Type: text/plain; charset="iso-8859-1"

Dear all
how we could create hounsfiled text file for series of DICOM files ?
best regards
                    Mohamad Pharaon
                          Nuclear Engineer
            Teacher Assistant at Faculty Of
       Mechanical And Electrical Engineering
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Message: 2
Date: Wed, 26 Feb 2020 11:07:52 +0900
From: 이승은 <seungeun058 at gmail.com>
To: gate-users at lists.opengatecollaboration.org
Subject: [Gate-users] No difference in output with different Davis LUT
surface setting
<CAAk8B1HrU-AH5GTpeeNE5aeuDH=dku_j5FtKR__yJ7_sY=Y7SQ at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Dear all,

I'm quite new to use Davis LUT model for optical simulation, so I just
simply tested the example file in vGATE 8.2
(/gate/GateContrib/imaging/LUTDavisModel) with setting the output format as

When I changed the optical boundary surface setting between the crystal and
the outside such as Rough, RoughESR_LUT, nothing changes in the light
output (e.g., # of optical transportation to the pixel) for 511 keV gamma
rays. According to several references, or also in common sense, light
output should be larger with any kind of reflector attached.
I attached my output (511 keV peak histogram) below.

I checked that I enabled the GATE_USE_OPTICAL and GATE_USE_DAVIS, and I
think the G4RealSurface2.1.1 was correctly installed.

Please tell me if there is something I missed.

Thank you for any help.

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