Design and construction of shoulder recesses into the beam aperture shields for improved patient positioning at the FiR 1 BNCT facility

Iiro Auterinen, Petri Kotiluoto, E. Hippeläinen, M. Kortesniemi, T. Seppälä, Tom Serén, V. Mannila, P. Pöyry, L. Kankaanranta, J. Collan, M. Kouri, H. Joensuu, S. Savolainen

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)

    Abstract

    Improvements have been made at the FiR 1 BNCT facility to ease the positioning of the patient with a tumor in the head and neck region into a lateral neutron beam. Shoulder recesses were constructed horizontally on both sides of the beam aperture. When shoulder recesses are not needed, they are filled with neutron attenuating filling blocks. MCNP simulations using an anthropomorphic human model BOMAB phantom showed that the main contribution to the increase in the effective dose to the patient's body due to the shoulder recesses was from the neutron dose of the arm. In a position when one arm is inside the shoulder recess, the maximal effective dose of the patient was estimated to be 0.7Sv/h. Dose measurements using the twin ionization chamber technique showed that the neutron dose increased on the sides as predicted by the MCNP model but there was no noticeable change in the gamma doses. When making the recesses into the lithium containing neutron shield material tritium contamination was confined using an underpressurized glove box and machine tools with local exhaust. The shoulder recesses give space for more flexible patient positioning and can be considered as a significant improvement of the Finnish BNCT facility.

    Original languageEnglish
    Pages (from-to)799-803
    JournalApplied Radiation and Isotopes
    Volume61
    Issue number5
    DOIs
    Publication statusPublished - 1 Nov 2004
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    recesses
    shoulders
    positioning
    apertures
    dosage
    neutrons
    gloves
    machine tools
    neutron beams
    ionization chambers
    tritium
    boxes
    contamination
    tumors
    lithium
    simulation

    Keywords

    • BNCT
    • Body dose
    • BOMAB
    • MCNP
    • Patient positioning
    • Tritium contamination

    Cite this

    Auterinen, Iiro ; Kotiluoto, Petri ; Hippeläinen, E. ; Kortesniemi, M. ; Seppälä, T. ; Serén, Tom ; Mannila, V. ; Pöyry, P. ; Kankaanranta, L. ; Collan, J. ; Kouri, M. ; Joensuu, H. ; Savolainen, S. / Design and construction of shoulder recesses into the beam aperture shields for improved patient positioning at the FiR 1 BNCT facility. In: Applied Radiation and Isotopes. 2004 ; Vol. 61, No. 5. pp. 799-803.
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    abstract = "Improvements have been made at the FiR 1 BNCT facility to ease the positioning of the patient with a tumor in the head and neck region into a lateral neutron beam. Shoulder recesses were constructed horizontally on both sides of the beam aperture. When shoulder recesses are not needed, they are filled with neutron attenuating filling blocks. MCNP simulations using an anthropomorphic human model BOMAB phantom showed that the main contribution to the increase in the effective dose to the patient's body due to the shoulder recesses was from the neutron dose of the arm. In a position when one arm is inside the shoulder recess, the maximal effective dose of the patient was estimated to be 0.7Sv/h. Dose measurements using the twin ionization chamber technique showed that the neutron dose increased on the sides as predicted by the MCNP model but there was no noticeable change in the gamma doses. When making the recesses into the lithium containing neutron shield material tritium contamination was confined using an underpressurized glove box and machine tools with local exhaust. The shoulder recesses give space for more flexible patient positioning and can be considered as a significant improvement of the Finnish BNCT facility.",
    keywords = "BNCT, Body dose, BOMAB, MCNP, Patient positioning, Tritium contamination",
    author = "Iiro Auterinen and Petri Kotiluoto and E. Hippel{\"a}inen and M. Kortesniemi and T. Sepp{\"a}l{\"a} and Tom Ser{\'e}n and V. Mannila and P. P{\"o}yry and L. Kankaanranta and J. Collan and M. Kouri and H. Joensuu and S. Savolainen",
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    Auterinen, I, Kotiluoto, P, Hippeläinen, E, Kortesniemi, M, Seppälä, T, Serén, T, Mannila, V, Pöyry, P, Kankaanranta, L, Collan, J, Kouri, M, Joensuu, H & Savolainen, S 2004, 'Design and construction of shoulder recesses into the beam aperture shields for improved patient positioning at the FiR 1 BNCT facility', Applied Radiation and Isotopes, vol. 61, no. 5, pp. 799-803. https://doi.org/10.1016/j.apradiso.2004.05.030

    Design and construction of shoulder recesses into the beam aperture shields for improved patient positioning at the FiR 1 BNCT facility. / Auterinen, Iiro; Kotiluoto, Petri; Hippeläinen, E.; Kortesniemi, M.; Seppälä, T.; Serén, Tom; Mannila, V.; Pöyry, P.; Kankaanranta, L.; Collan, J.; Kouri, M.; Joensuu, H.; Savolainen, S.

    In: Applied Radiation and Isotopes, Vol. 61, No. 5, 01.11.2004, p. 799-803.

    Research output: Contribution to journalArticleScientificpeer-review

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    T1 - Design and construction of shoulder recesses into the beam aperture shields for improved patient positioning at the FiR 1 BNCT facility

    AU - Auterinen, Iiro

    AU - Kotiluoto, Petri

    AU - Hippeläinen, E.

    AU - Kortesniemi, M.

    AU - Seppälä, T.

    AU - Serén, Tom

    AU - Mannila, V.

    AU - Pöyry, P.

    AU - Kankaanranta, L.

    AU - Collan, J.

    AU - Kouri, M.

    AU - Joensuu, H.

    AU - Savolainen, S.

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    KW - Body dose

    KW - BOMAB

    KW - MCNP

    KW - Patient positioning

    KW - Tritium contamination

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