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

I. Auterinen, P. Kotiluoto, E. Hippeläinen, M. Kortesniemi, T. Seppälä, T. 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
Number of pages5
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, 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. / 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.",
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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, 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.

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

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

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

AU - Auterinen, I.

AU - Kotiluoto, P.

AU - Hippeläinen, E.

AU - Kortesniemi, M.

AU - Seppälä, T.

AU - Serén, T.

AU - Mannila, V.

AU - Pöyry, P.

AU - Kankaanranta, L.

AU - Collan, J.

AU - Kouri, M.

AU - Joensuu, H.

AU - Savolainen, S.

PY - 2004/11/1

Y1 - 2004/11/1

N2 - 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.

AB - 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.

KW - BNCT

KW - Body dose

KW - BOMAB

KW - MCNP

KW - Patient positioning

KW - Tritium contamination

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U2 - 10.1016/j.apradiso.2004.05.030

DO - 10.1016/j.apradiso.2004.05.030

M3 - Article

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EP - 803

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