Experimental validation of a Monte Carlo proton therapy nozzle model incorporating magnetically steered protons
| Autor: | L Archambault, S Peterson, A Smith, J Polf, Martin Bues, G. Ciangaru, Sam Beddar |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Proton Physics::Medical Physics Nozzle Monte Carlo method Radiation Models Biological Sensitivity and Specificity Fluence Magnetics Proton Therapy Humans Scattering Radiation Computer Simulation Radiology Nuclear Medicine and imaging Radiometry Proton therapy Simulation Models Statistical Radiological and Ultrasound Technology Reproducibility of Results Radiotherapy Dosage Equipment Design Computational physics Equipment Failure Analysis Full width at half maximum Computer-Aided Design Physics::Accelerator Physics Radiotherapy Conformal Monte Carlo Method Beam (structure) |
| Zdroj: | Physics in Medicine and Biology. 54:3217-3229 |
| ISSN: | 1361-6560 0031-9155 |
| DOI: | 10.1088/0031-9155/54/10/017 |
| Popis: | The purpose of this study is to validate the accuracy of a Monte Carlo calculation model of a proton magnetic beam scanning delivery nozzle developed using the Geant4 toolkit. The Monte Carlo model was used to produce depth dose and lateral profiles, which were compared to data measured in the clinical scanning treatment nozzle at several energies. Comparisons were also made between measured and simulated off-axis profiles to test the accuracy of the model's magnetic steering. Comparison of the 80% distal dose fall-off values for the measured and simulated depth dose profiles agreed to within 1 mm for the beam energies evaluated. Agreement of the full width at half maximum values for the measured and simulated lateral fluence profiles was within 1.3 mm for all energies. The position of measured and simulated spot positions for the magnetically steered beams agreed to within 0.7 mm of each other. Based on these results, we found that the Geant4 Monte Carlo model of the beam scanning nozzle has the ability to accurately predict depth dose profiles, lateral profiles perpendicular to the beam axis and magnetic steering of a proton beam during beam scanning proton therapy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|