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Beam spot imaging system using a fluorescent screen for carbon-ion radiotherapy

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Abstract

A two-dimensional (2D) beam imaging system with a fluorescent intensifying screen and high-speed charge-coupled device (CCD) camera was developed to observe the fluctuations of the beam position and size. This system can perform imaging of the beam spot and the calculation of both its position and size from the obtained image with a cycle-time of 20 ms. For quality assurance of scanned carbon-ion therapy, we measured the stability of the unscanned-beam position and size by using this system at the isocenter in a treatment room. We confirmed that the fluctuation ranges of its position and size were less than the tolerance for scanning irradiation.

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Authors and Affiliations

  1. Medical Physics Research Program, Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, 263-8555, Japan

    K. Mizushima, E. Takeshita, T. Furukawa, Y. Hara, T. Shirai, K. Katagiri & K. Noda

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  1. K. Mizushima
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  2. E. Takeshita
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  3. T. Furukawa
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  4. Y. Hara
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  5. T. Shirai
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  6. K. Katagiri
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  7. K. Noda
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Corresponding author

Correspondence to K. Mizushima.

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Mizushima, K., Takeshita, E., Furukawa, T. et al. Beam spot imaging system using a fluorescent screen for carbon-ion radiotherapy. Journal of the Korean Physical Society 63, 1437–1440 (2013). https://doi.org/10.3938/jkps.63.1437

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  • DOI: https://doi.org/10.3938/jkps.63.1437

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