SU-E-T-161: SOBP Beam Analysis Using Light Output of Scintillation Plate Acquired by CCD Camera

Area of Science:

• Medical Physics
• Particle Therapy
• Radiation Detection

Background:

• Proton therapy utilizes spread-out Bragg-peak (SOBP) beams for precise radiation delivery.
• Accurate characterization of SOBP beams is crucial for effective cancer treatment.
• Bragg-peak analysis within SOBP beams requires advanced imaging and simulation techniques.

Purpose of the Study:

• To analyze Bragg-peak beams in a spread-out Bragg-peak (SOBP) beam using a charge-coupled device (CCD) camera and scintillation screen system.
• To compare experimental measurements of Bragg-peak beams with Monte Carlo simulations.
• To evaluate the efficacy of a CCD camera-scintillation system for SOBP beam characterization.

Main Methods:

• A CCD camera-scintillation screen system was constructed using a high-sensitivity Gd2O2S:Tb scintillation plate and a Marlin F-201B CCD camera.
• The system was used to analyze Bragg-peak beams within an SOBP beam generated by a PROTEUS 235 proton therapy machine.
• Light output from the scintillation plate was simulated using the Geant4 toolkit for comparison with experimental data.

Main Results:

• The light output of the scintillation plate was evaluated based on integration time.
• Bragg-peak beams within the SOBP beam were analyzed using acquired CCD images.
• The experimental results were compared with Bragg-peak beams simulated using Geant4 and processed with the ROOT program.
• The SOBP beam was found to consist of 13 Bragg-peak beams.

Conclusions:

• The study successfully analyzed Bragg-peak beams in an SOBP beam using a CCD camera and scintillation plate system.
• Experimental findings were consistent with Geant4 simulations, validating the system's capability.
• Future work will focus on improving image acquisition techniques for more effective SOBP beam analysis.