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Development of a compact dose verification system using a fluorescent screen for carbon-ion therapy

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Abstract

For quality assurance (QA) of therapeutic ion beams, a QA tool having high spatial resolution and quick verification is required. An imaging system with a fluorescent screen is suitable for the QA procedure. We developed a compact and quick verification system (NQA-SCN) using a fluorescent screen with a charge-coupled device (CCD) camera for the sake of two-dimensional dosimetry. The NQA-SCN can be attached to the irradiation port and the water column. Several types of corrections were applied to the raw image obtained by using the NQA-SCN. Our goal is to use the NQA-SCN for three-dimensional dose verification. However, in carbon-ion therapy, the fluorescent light is decreased by the quenching effect due to the increased linear energy transfer (LET) in the Bragg peak. For three-dimensional dose verification, as a first approach, we investigated the quenching effect of a carbon-ion beam in water. Also, to evaluate the performance of NQA-SCN, we carried out experiments concerning QA procedures.

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Authors and Affiliations

  1. National Institute of Radiological Sciences, Chiba, 263-8555, Japan

    Yousuke Hara, Takuji Furukawa, Kota Mizushima, Naoya Saotome, Yuichi Saraya, Ryohei Tansho, Toshiyuki Shirai & Koji Noda

  2. Kanagawa Cancer Center, Kanagawa, 241-0815, Japan

    Eri Takeshita

Authors
  1. Yousuke Hara
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  2. Takuji Furukawa
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  3. Kota Mizushima
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  4. Naoya Saotome
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  5. Yuichi Saraya
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  6. Ryohei Tansho
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  7. Toshiyuki Shirai
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  8. Koji Noda
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  9. Eri Takeshita
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Corresponding author

Correspondence to Yousuke Hara.

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Hara, Y., Furukawa, T., Mizushima, K. et al. Development of a compact dose verification system using a fluorescent screen for carbon-ion therapy. Journal of the Korean Physical Society 69, 1014–1018 (2016). https://doi.org/10.3938/jkps.69.1014

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  • DOI: https://doi.org/10.3938/jkps.69.1014

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