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Geant4 - Brachytherapy example
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README
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----> Introduction. |
Brachytherapy example simulates energy deposit in a Phantom filled with |
soft tissue for:
1) Iridium source (endocavitary brachytherapy). |
2) Iodium source (interstitial brachytherapy).
3) Leipzig Applicator (superficial brachytherapy). |
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----> 1.Experimental set-up. |
The default source is an Ir-131 source put in the center of the Phantom.|
The Phantom is a box (dimension:30cm), it is gridded in
voxels (1.mm dimension) |
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----> 2.SET-UP
|
-example enviroment with the compiler 3.2
-a standard Geant4 example GNUmakefile is provided |
setup with: |
compiler = gcc-3.2
G4SYSTEM = linux-g++ |
The following environment variables need to be set: |
G4LEDATA: points to low energy data base - G4EMLOW2.2 |
setup for analysis with AIDA 3.0/Anaphe 5.0.5 for user with account |
on lxplus:
|
setenv G4ANALYSIS_USE 1
setenv G4ANALYSIS_BUILD 1 |
source /afs/cern.ch/sw/lhcxx/share/LHCXX/5.0.5/scripts/setupAnaphe.csh
setenv PATH ${PATH}:/afs/cern.ch/sw/lhcxx/share/LHCXX/5.0.5/scripts/ |
Please take a look to the Anaphe/Lizard web page |
http://anaphe.web.cern.ch/anaphe
for more info |
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----> 3.How to run the example. |
- batch mode:
$G4WORDIR/bin/Linux-g++/Brachy IridiumSourceMacro.mac |
$G4WORDIR/bin/Linux-g++/Brachy IodiumSourceMacro.mac
$G4WORDIR/bin/Linux-g++/Brachy LeipzigSourceMacro.mac
|
- Interative mode:
3) $G4WORDIR/bin/Linux-g++/Brachy |
-->possible different configurations for interactive mode: |
1)Ir source: |
idle>/run/beamOn NumberOfEvents ...and then
idle>exit |
2)Leipzig Applicator: |
idle>/source/switch Leipzig
idle>/run/beamOn NumberOfEvents ...and then |
idle> exit
|
3) Iodium source:
idle>/source/switch Iodium |
idle>/run/energy Iodium
idle>/run/beamOn NumberOfEvents ...and then |
idle>exit
|
*Before the run you can also change the absorber material of the
Phantom: |
idle>/phantom/selectMaterial materialName
|
- batch mode: executable Brachy macroFile.mac
a macro is provided as example: IodiumSourceMacro.mac |
(ex. $G4WORKDIR/bin/Linux-g++/Brachy IodiumSourceMacro.mac)
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----> 4. Simulation output |
if ANALYSIS_USE = 1 in the set-up, the output is brachytherapy.hbk |
It contains:
1)1Dhistogram with the primary particle energy |
2)2Dhistogram with the distribution of energy in the plane
(x,z,energy) containing the source (YThickness = 1. mm) |
3)Ntuple with the 3D energy deposit in the Phantom
|
Units: the energy deposit is in MeV;
x, y, z in mm for both 2D-histogram and ntuple |
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----> 5.Visualisation |
a macro is provided ad example of visulisation: VisualisationMacro.mac |
run $G4WORKDIR/bin/Linux-g++/Brachy VisualisationMacro.mac
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for comments, advices, doubts and questions: guatelli@ge.infn.it
for more info http://www.ge.infn.it/geant4/examples/index.html
last modified: Susanna Guatelli 28/5/2003
Gabriele Cosmo