Comparison of Monitor Unit between Electron Monte Carlo Algorithm by Different Dose Normalization Methods and Conventional Manual Calculation
| العنوان: | Comparison of Monitor Unit between Electron Monte Carlo Algorithm by Different Dose Normalization Methods and Conventional Manual Calculation |
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| المؤلفون: | Y. Ishihara, Manabu Nakata, Takahiro Fujimoto, Mitsuhiro Nakamura, Maki Shioji |
| المصدر: | Japanese Journal of Radiological Technology. 75:755-764 |
| بيانات النشر: | Japanese Society of Radiological Technology, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Normalization (statistics), Monitor unit, Breast boost, Phantoms, Imaging, Radiotherapy Planning, Computer-Assisted, Monte Carlo method, Electrons, Radiotherapy Dosage, General Medicine, Electron, Imaging phantom, Calculation methods, Monte Carlo Method, Algorithms, Monte Carlo algorithm, Mathematics, Biomedical engineering |
| الوصف: | The purpose of this study was to evaluate the discrepancy between the monitor unit (MU) calculated by different dose normalization methods in the electron Monte Carlo (eMC) algorithm and the conventional manual MU. In the water phantom condition, the manual MU obtained from the measured output factor was compared with the calculated MU by the eMC algorithm, using 24 different irradiation field shapes and several different energies of electron beam. In the breast boost condition, calculated MUs by both calculation methods were evaluated for 45 cases. As a result, the MUs computed by the eMC algorithm in the water phantom varied according to the dose normalization methods, and the mean±standard deviation of the difference between the manual and calculated MU were 1.1±1.4%, 0.0±1.0% and 0.4±1.2% in peak depth normalization (PN), no plan normalization (NPN) and 100% at body maximum (100%BM), respectively. In breast-boost cases, the MU difference between the manual and the calculated MU were 6.1±3.7%, 3.4±2.8% and 1.1±2.9% in PN, NPN and 100%BM, respectively. We revealed that the resultant MU calculated by eMC algorithm was dependent on the dose normalization method and the averaged differences exceeded 6% in PN, especially in breast boost condition. When using the eMC in the breast boost condition, it is desirable to select an appropriate dose normalization method according to dose prescription policies at each facility. |
| تدمد: | 1881-4883 0369-4305 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f153fb08db32a338e60aaf83ea870697 https://doi.org/10.6009/jjrt.2019_jsrt_75.8.755 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....f153fb08db32a338e60aaf83ea870697 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18814883 03694305 |
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