Study on the Electronic Return Effect in the MRI Guided Radiotherapy by Monte Carlo Simulation
doi: 10.11804/NuclPhysRev.32.03.363
- Received Date: 1900-01-01
- Rev Recd Date: 1900-01-01
- Publish Date: 2015-09-20
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Key words:
- radiation treatment /
- photon beam /
- magnetic field /
- Monte Carlo
Abstract: A Monte Carlo code was used to study the discrepancy resulted from the emergence of magnetic field in MRI guided radiotherapy. In this work, four different tissue phantoms with magnetic field and 6 MV photon were studied, and the dose distributions at the interface of phantom-air were evaluated. It is found that the differences of the dose perturbation are small between the materials with similar ionization energy. However, the dose perturbation decreased significantly for the material with high ionization energy. The results of this study demonstrate that magnetic field will change the dose distribution of photon beam and the dose perturbation associated with ionization energy of materials. It means that magnetic resonance imaging guided radiotherapy can enhance the target accuracy, but the magnetic field will change the dose distribution of photon beam, and the perturbation was not the same for the different materials of human tissue, it has brought new challenges for the research of dose algorithm.
Citation: | YOU Shihu, HU Nan, WU Zhangwen, LIU Yanhai, WU Junxiang, HOU Qing, GOU Chengjun. Study on the Electronic Return Effect in the MRI Guided Radiotherapy by Monte Carlo Simulation[J]. Nuclear Physics Review, 2015, 32(3): 363-367. doi: 10.11804/NuclPhysRev.32.03.363 |