Main Page
From UCL HEP PBT Wiki
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: Kill, suspend, postpone a track | : Kill, suspend, postpone a track | ||
| - | You can create your own classes which are derived from the base classes. All of them should be registered with the G4RunManager. In function main() which is the skeleton of | + | You can create your own classes which are derived from the base classes. All of them should be registered with the G4RunManager. In function main() which is the skeleton of your simulation code you instantiate G4RunManager and notify it of your mandatory and optional classes. |
== Basic tutorials == | == Basic tutorials == | ||
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* Setting up the environment | * Setting up the environment | ||
| - | ; Connect to plus1 cluster and create folder PhotonPencilBeam in your | + | ; Connect to plus1 cluster and create folder PhotonPencilBeam in your area |
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| - | <span style="color:#800000"> source | + | <span style="color:#800000"> source GEANT4 script </span> |
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=== Proton beam with realistic geometry incident on a water cube === | === Proton beam with realistic geometry incident on a water cube === | ||
| + | ---- | ||
| + | ==== Gaussian beam profile ==== | ||
| + | ---- | ||
| + | * Introduction | ||
| + | * Setting up the environment | ||
| + | * How to get the code | ||
| + | * How to run the code | ||
| + | * How to analyze data | ||
| + | * Comparison with data from The Clatterbridge Cancer Centre | ||
| + | |||
| + | ==== Beam profile defined from phase space files ==== | ||
---- | ---- | ||
* Introduction | * Introduction | ||
Revision as of 14:33, 2 July 2014
Contents
|
Introduction
This is a tutorial about applications of GEANT4 to medical physics. The GEANT4 is installed on the HEP Linux cluster at UCL. You will need an account on that cluster to be able to use this software, run example tutorials and create your own applications.
Accounts and Registration
Getting a computing account
Apply for a computing account on the HEP Linux cluster by sending e-mail to HEPComputingSupport. In your e-mail you have to state the reason for your application (e.g. medical physics student who will use GEANT4 on the HEP cluster).
You will receive an e-mail from the HEP computing support with your username and password. Now you can log in to the HEP cluster “plus1” via ssh username@plus1.hep.ucl.ac.uk.
Where to get help
You can send e-mail to the GEANT4 support at GEANT4Support or write to the forum.
The basics of GEANT4
GEANT4 is a toolkit for simulating the passage of particles through matter. The user creates his/her own simulation application using GEANT4 tools. The tools are base classes. There are eight base classes.
- Three classes are mandatory
- G4VUserDetectorConstruction
- Describe the experimental setup, geometry and materials
- G4VUserPhysicsList
- Define particles, physics processes and range cuts
- G4UserPrimaryGeneratorAction
- Describe particle source, source dimensions, initial position, energy spectrum, angular distributions
- The rest are optional
- G4UserRunAction
- Define and store histograms
- G4UserEventAction
- Event selection and analysis of simulation data
- G4UserStackingAction
- Customize priority of tracks
- G4UserTrackingAction
- Decide whether a trajectory should be stored or not
- G4UserSteppingAction
- Kill, suspend, postpone a track
You can create your own classes which are derived from the base classes. All of them should be registered with the G4RunManager. In function main() which is the skeleton of your simulation code you instantiate G4RunManager and notify it of your mandatory and optional classes.
Basic tutorials
Monoenergetic photon pencil beam incident on a water cube
- Introduction
This example shows the dose distribution in water along the incident photon beam. The beam hits the water cube surface and deposits a dose under the surface of the water. The volume of the water cube is divided into voxels. At each voxel the dose contribution from the pencil beams is summed up and yields the total dose along the beam axis.
- Setting up the environment
- Connect to plus1 cluster and create folder PhotonPencilBeam in your area
ssh username@plus1.hep.ucl.ac.uk
cd /home/username/
mkdir PhotonPencilBeam
cd PhotonPencilBeam
- Setup GEANT4 environment
source GEANT4 script
- How to get the code
- Copy the code to your area
cp -r /vasileva/BasicExamples/PhotonPencilBeam_source /username/PhotonPencilBeam/
- How to run the code
- Inside /username/PhotonPencilBeam/ create folder
mkdir PhotonPencilBeam_build
- Change to this directory and run cmake and make to build the PhotonPencilBeam tutorial
cd PhotonPencilBeam_build
cmake -DGeant4_DIR=/unix/pbt/Software/..../ /username/PhotonPencilBeam_source/
make
- How to analyze data
Monoenergetic proton pencil beam incident on a water cube
- Introduction
- Setting up the environment
- How to get the code
- How to run the code
- How to analyze data
- Comparison with data from The Clatterbridge Cancer Centre
Proton beam with realistic geometry incident on a water cube
Gaussian beam profile
- Introduction
- Setting up the environment
- How to get the code
- How to run the code
- How to analyze data
- Comparison with data from The Clatterbridge Cancer Centre
Beam profile defined from phase space files
- Introduction
- Setting up the environment
- How to get the code
- How to run the code
- How to analyze data
- Comparison with data from The Clatterbridge Cancer Centre
Several proton beams with spread out Bragg peaks
- Introduction
- Setting up the environment
- How to get the code
- How to run the code
- How to analyze data
Advanced tutorials
Cherenkov simulation
- Introduction
- Setting up the environment
- How to get the code
- How to run the code
- How to analyze data
Computed tomography
- Introduction
- Setting up the environment
- How to get the code
- How to run the code
- How to analyze data
High-precision dosimetry
- Introduction
- Setting up the environment
- How to get the code
- How to run the code
- How to analyze data
