[Gate-users] how to specify I-131 energy distributions
Mike Tabriz
mtabriz at yahoo.com
Sun Jul 15 19:31:28 CEST 2012
Greetings,
I am working with I-131 which is both a gamma and beta emitter wth the following energy distributions:
Radiation Y(%) E(MeV)
beta-1 2.10 0.0694
beta-3 7.27 0.0966
beta-4 89.9 0.1916
beta-6 0.48 0.2832
gamma-1 2.62 0.0801
gamma-6 6.14 0.2842
gamma-13 81.7 0.3644
gamma-16 7.17 0.6370
gamma-18 1.77 0.7229
Would I be able to include both spectra on the same macro or would I have to run them separately?
Thank you in advance,
Mike
--- On Fri, 5/11/12, gate-users-request at lists.opengatecollaboration.org <gate-users-request at lists.opengatecollaboration.org> wrote:
From: gate-users-request at lists.opengatecollaboration.org <gate-users-request at lists.opengatecollaboration.org>
Subject: Gate-users Digest, Vol 72, Issue 11
To: gate-users at lists.opengatecollaboration.org
Date: Friday, May 11, 2012, 3:00 AM
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Today's Topics:
1. Re: how to specify I-123 energy distributions
(Panagiotis Papadimitroulas)
2. Re: how to specify I-123 energy distributions (Yann PERROT)
----------------------------------------------------------------------
Message: 1
Date: Thu, 10 May 2012 13:23:54 +0300
From: Panagiotis Papadimitroulas <panpap_5 at hotmail.com>
To: <slee91 at utk.edu>, <gate-users at lists.opengatecollaboration.org>
Subject: Re: [Gate-users] how to specify I-123 energy distributions
Message-ID: <BAY146-W284D1F193560E38B7B9479BB160 at phx.gbl>
Content-Type: text/plain; charset="iso-8859-7"
Dear Lee,
I am listing bellow an example of how to use a spectrum of an isotope that you want to simulate...
In my case I used a b- spectrum.
/gate/source/addSource point_source
/gate/source/point_source/gps/particle e-
#/gate/source/point_source/setActivity 2000 Bq
/gate/source/point_source/gps/type Point
/gate/source/point_source/gps/energytype Arb
/gate/source/point_source/gps/histname arb
/gate/source/point_source/gps/emin 0.0 MeV
/gate/source/point_source/gps/emax 0.4983 MeV
/gate/source/point_source/gps/histpoint 0.0 5670
/gate/source/point_source/gps/histpoint 0.004 5570
/gate/source/point_source/gps/histpoint 0.008 5470
/gate/source/point_source/gps/histpoint 0.014 5330
/gate/source/point_source/gps/histpoint 0.027 5080
/gate/source/point_source/gps/histpoint 0.037 4880
/gate/source/point_source/gps/histpoint 0.040 4820
/gate/source/point_source/gps/histpoint 0.050 4620
/gate/source/point_source/gps/histpoint 0.055 4520
/gate/source/point_source/gps/histpoint 0.074 4130
/gate/source/point_source/gps/histpoint 0.082 3980
/gate/source/point_source/gps/histpoint 0.095 3720
.
.
.
/gate/source/point_source/gps/arbint Lin
/gate/source/point_source/setForcedUnstableFlag true
/gate/source/point_source/setForcedHalfLife 574560. s
/gate/source/point_source/gps/angtype iso
So, in your case you have to define gammas instead of e- . Also the 1st column of the histpoint gives the intensity of the respectively energy, while the energy in the 2nd column is in MeV..
Hope it helps, for modifying your source.
Regards,
Panagiotis
##########################################
### Panagiotis Papadimitroulas, Msc
### PhD candidate, Department of Medical Physics
### University of Patras
### Greece
###
### email: panpap_5 at hotmail.com
### web page: http://www.teiath.gr/stef/tio/ni/
### http://www.kagadis.gr
> From: slee91 at utk.edu
> To: gate-users at lists.opengatecollaboration.org
> Date: Wed, 9 May 2012 20:55:01 +0000
> Subject: [Gate-users] how to specify I-123 energy distributions
>
> Hey guys!
>
> I am trying to model a I-123 with the following energy distributions.
>
> 1) 159 keV 83%
> 2) 346 keV 0.13%
> 3) 440 keV: 0.42%
> 4) 505 keV: 0.32%
> 5) 529 keV: 1.39%
> 6) 539 keV: 0.38%
>
> for example, there is 83% chance that 159 keV gamma photon is emitted.
>
> In this case, do I need to use arbitrary point-wise spectrum "Arb"? There seems to be no clear explanation of how to use this command in Gate manual. Can anyone point me to a good example of how to use arb?
>
> Thanks,
> Sanghyeb(Sam) Lee
>
> PhD Candidate
> Department of Electrical Engineering and Computer Science
> University of Tennessee, Knoxville
> Personal webpage: www.sergeantlee.com
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.opengatecollaboration.org
> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
------------------------------
Message: 2
Date: Thu, 10 May 2012 14:03:22 +0200
From: Yann PERROT <perrot at clermont.in2p3.fr>
To: slee91 at utk.edu
Cc: gate-users at lists.opengatecollaboration.org
Subject: Re: [Gate-users] how to specify I-123 energy distributions
Message-ID: <4FABAE8A.8000506 at clermont.in2p3.fr>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Dear Lee,
Be careful if you want to produce a discrete spectrum (it seems to be
your case).
The commands that Panagiotis send you perform a linear interpolation of
the energy between the points.
The result is a continuous spectrum.
To simualte a discrete spectrum, you can define a source for each ray
with a probability set by the command:
/gate/source/NAME/setIntensity [value]
For example:
...
/gate/source/src1/gps/energytype Mono
/gate/source/src1/gps/monoenergy 159 keV
/gate/source/src1/setIntensity 0.83
...
/gate/source/src2/gps/energytype Mono
/gate/source/src2/gps/monoenergy 346 keV
/gate/source/src2/setIntensity 0.013
Bests,
Yann
> Dear Lee,
>
> I am listing bellow an example of how to use a spectrum of an isotope that you want to simulate...
> In my case I used a b- spectrum.
>
> /gate/source/addSource point_source
> /gate/source/point_source/gps/particle e-
> #/gate/source/point_source/setActivity 2000 Bq
> /gate/source/point_source/gps/type Point
> /gate/source/point_source/gps/energytype Arb
> /gate/source/point_source/gps/histname arb
> /gate/source/point_source/gps/emin 0.0 MeV
> /gate/source/point_source/gps/emax 0.4983 MeV
>
> /gate/source/point_source/gps/histpoint 0.0 5670
> /gate/source/point_source/gps/histpoint 0.004 5570
> /gate/source/point_source/gps/histpoint 0.008 5470
> /gate/source/point_source/gps/histpoint 0.014 5330
> /gate/source/point_source/gps/histpoint 0.027 5080
> /gate/source/point_source/gps/histpoint 0.037 4880
> /gate/source/point_source/gps/histpoint 0.040 4820
> /gate/source/point_source/gps/histpoint 0.050 4620
> /gate/source/point_source/gps/histpoint 0.055 4520
> /gate/source/point_source/gps/histpoint 0.074 4130
> /gate/source/point_source/gps/histpoint 0.082 3980
> /gate/source/point_source/gps/histpoint 0.095 3720
> .
> .
> .
> /gate/source/point_source/gps/arbint Lin
> /gate/source/point_source/setForcedUnstableFlag true
> /gate/source/point_source/setForcedHalfLife 574560. s
> /gate/source/point_source/gps/angtype iso
>
> So, in your case you have to define gammas instead of e- . Also the 1st column of the histpoint gives the intensity of the respectively energy, while the energy in the 2nd column is in MeV..
> Hope it helps, for modifying your source.
>
> Regards,
> Panagiotis
>
> ##########################################
> ### Panagiotis Papadimitroulas, Msc
> ### PhD candidate, Department of Medical Physics
> ### University of Patras
> ### Greece
> ###
> ### email: panpap_5 at hotmail.com
> ### web page: http://www.teiath.gr/stef/tio/ni/
> ### http://www.kagadis.gr
>
>> From: slee91 at utk.edu
>> To: gate-users at lists.opengatecollaboration.org
>> Date: Wed, 9 May 2012 20:55:01 +0000
>> Subject: [Gate-users] how to specify I-123 energy distributions
>>
>> Hey guys!
>>
>> I am trying to model a I-123 with the following energy distributions.
>>
>> 1) 159 keV 83%
>> 2) 346 keV 0.13%
>> 3) 440 keV: 0.42%
>> 4) 505 keV: 0.32%
>> 5) 529 keV: 1.39%
>> 6) 539 keV: 0.38%
>>
>> for example, there is 83% chance that 159 keV gamma photon is emitted.
>>
>> In this case, do I need to use arbitrary point-wise spectrum "Arb"? There seems to be no clear explanation of how to use this command in Gate manual. Can anyone point me to a good example of how to use arb?
>>
>> Thanks,
>> Sanghyeb(Sam) Lee
>>
>> PhD Candidate
>> Department of Electrical Engineering and Computer Science
>> University of Tennessee, Knoxville
>> Personal webpage: www.sergeantlee.com
>> _______________________________________________
>> Gate-users mailing list
>> Gate-users at lists.opengatecollaboration.org
>> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
>
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.opengatecollaboration.org
> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
------------------------------
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