GEANT4 simulations for low energy proton computerized tomography.

Area of Science:

• Medical Physics
• Particle Accelerator Technology
• Computational Imaging

Background:

• The Institute of Nuclear Engineering (IEN) utilizes a CV-28 cyclotron for low-energy proton beam applications.
• Proton beam tomography offers a unique imaging modality, but accurate simulation is crucial for experimental validation.

Purpose of the Study:

• To refine computer simulation parameters for a low-energy proton beam tomographic scanner.
• To investigate factors influencing proton energy spectra in tomographic measurements.
• To improve the realism of simulation models based on initial experimental data.

Main Methods:

• Advanced computer simulations were conducted for the proton beam tomographic scanner.
• Initial proton beam energy and angular spread were incorporated into the simulation model.
• Virtual phantom geometry was meticulously defined to match the physical setup more closely.

Main Results:

• Simulation parameters were successfully adjusted to align with preliminary experimental outcomes.
• The inclusion of beam spread and refined phantom geometry led to a more accurate representation of measured proton energy spectra.
• Specific effects impacting spectral form were better understood through the enhanced simulation.

Conclusions:

• The refined simulation model provides a more realistic depiction of proton beam tomography measurements.
• This improved model facilitates better interpretation of experimental data and further optimization of the tomographic scanner.
• Accurate simulation is vital for advancing proton beam imaging techniques.