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Development of digital reconstructed radiography software at new treatment facility for carbon-ion beam scanning of National Institute of Radiological Sciences

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Abstract

To increase the accuracy of carbon ion beam scanning therapy, we have developed a graphical user interface-based digitally-reconstructed radiograph (DRR) software system for use in routine clinical practice at our center. The DRR software is used in particular scenarios in the new treatment facility to achieve the same level of geometrical accuracy at the treatment as at the imaging session. DRR calculation is implemented simply as the summation of CT image voxel values along the X-ray projection ray. Since we implemented graphics processing unit-based computation, the DRR images are calculated with a speed sufficient for the particular clinical practice requirements. Since high spatial resolution flat panel detector (FPD) images should be registered to the reference DRR images in patient setup process in any scenarios, the DRR images also needs higher spatial resolution close to that of FPD images. To overcome the limitation of the CT spatial resolution imposed by the CT voxel size, we applied image processing to improve the calculated DRR spatial resolution. The DRR software introduced here enabled patient positioning with sufficient accuracy for the implementation of carbon-ion beam scanning therapy at our center.

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Authors and Affiliations

  1. Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan

    Shinichiro Mori, Taku Inaniwa, Motoki Kumagai, Tsunekazu Kuwae, Yuka Matsuzaki, Takuji Furukawa, Toshiyuki Shirai & Koji Noda

  2. Department of Medical Physics, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, Japan

    Shinichiro Mori

Authors
  1. Shinichiro Mori
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  2. Taku Inaniwa
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  3. Motoki Kumagai
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  4. Tsunekazu Kuwae
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  5. Yuka Matsuzaki
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  6. Takuji Furukawa
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  7. Toshiyuki Shirai
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  8. Koji Noda
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Correspondence to Shinichiro Mori.

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Mori, S., Inaniwa, T., Kumagai, M. et al. Development of digital reconstructed radiography software at new treatment facility for carbon-ion beam scanning of National Institute of Radiological Sciences. Australas Phys Eng Sci Med 35, 221–229 (2012). https://doi.org/10.1007/s13246-012-0142-4

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  • DOI: https://doi.org/10.1007/s13246-012-0142-4

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