Study on the Electronic Return Effect in the MRI Guided Radiotherapy by Monte Carlo Simulation

YOU Shihu; HU Nan; WU Zhangwen; LIU Yanhai; WU Junxiang; HOU Qing; GOU Chengjun

doi:10.11804/NuclPhysRev.32.03.363

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Article Navigation > Nuclear Physics Review > 2015 > 32(3): 363-367

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

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

Study on the Electronic Return Effect in the MRI Guided Radiotherapy by Monte Carlo Simulation

doi: 10.11804/NuclPhysRev.32.03.363

Key Laboratory for Radiation Physics and Technology of Ministry of Education, Institue of Nuclear Science andTechnology, Sichuan University, Chengdu 610064, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2015-09-20

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.
- radiation treatment,
- photon beam,
- magnetic field,
- Monte Carlo
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Study on the Electronic Return Effect in the MRI Guided Radiotherapy by Monte Carlo Simulation

doi: 10.11804/NuclPhysRev.32.03.363

Key Laboratory for Radiation Physics and Technology of Ministry of Education, Institue of Nuclear Science andTechnology, Sichuan University, Chengdu 610064, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2015-09-20

Key words:

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