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De Saint-Hubert M, Saldarriaga Vargas C, Van Hoey O, Schoonjans W, De Smet V, Mathot G, Stichelbaut F, Manessi G, Dinar N, Aza E, Cassell C, Silari M, Vanhavere F. SECONDARY NEUTRON DOSES IN A PROTON THERAPY CENTRE. Radiat Prot Dosimetry 2016; 170:336-341. [PMID: 26541188 DOI: 10.1093/rpd/ncv458] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The formation of secondary high-energy neutrons in proton therapy can be a concern for radiation protection of staff. In this joint intercomparative study (CERN, SCK•CEN and IBA/IRISIB/ULB), secondary neutron doses were assessed with different detectors in several positions in the Proton Therapy Centre, Essen (Germany). The ambient dose equivalent H(*)(10) was assessed with Berthold LB 6411, WENDI-2, tissue-equivalent proportional counter (TEPC) and Bonner spheres (BS). The personal dose equivalent Hp(10) was measured with two types of active detectors and with bubble detectors. Using spectral and basic angular information, the reference Hp(10) was estimated. Results concerning staff exposure show H(*)(10) doses between 0.5 and 1 nSv/monitoring unit in a technical room. The LB 6411 showed an underestimation of H(*)(10), while WENDI-2 and TEPC showed good agreement with the BS data. A large overestimation for Hp(10) was observed for the active personal dosemeters, while the bubble detectors showed only a slight overestimation.
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Affiliation(s)
- M De Saint-Hubert
- Dosimetry and Calibration, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, 2400 Mol, Belgium
| | - C Saldarriaga Vargas
- Dosimetry and Calibration, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, 2400 Mol, Belgium
| | - O Van Hoey
- Dosimetry and Calibration, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, 2400 Mol, Belgium
| | - W Schoonjans
- Dosimetry and Calibration, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, 2400 Mol, Belgium
| | - V De Smet
- Département Nucléaire, Institut de Recherche de l'Institut Supérieur Industriel de Bruxelles (IRISIB), Rue Royale 150, 1000 Bruxelles, Belgium Université Libre de Bruxelles, Inter-university Institute for High Energies (IIHE), Boulevard du Triomphe CP230, 1050 Bruxelles, Belgium
| | - G Mathot
- Ion Beam Applications S.A., Chemin du Cyclotron 3, 1348 Louvain-la-Neuve, Belgium
| | - F Stichelbaut
- Ion Beam Applications S.A., Chemin du Cyclotron 3, 1348 Louvain-la-Neuve, Belgium
| | - G Manessi
- CERN, CH-1211 Geneva 23, Switzerland Department of Physics, University of Liverpool, L697ZE Liverpool, UK
| | - N Dinar
- CERN, CH-1211 Geneva 23, Switzerland
| | - E Aza
- CERN, CH-1211 Geneva 23, Switzerland
| | - C Cassell
- Department of Energy, Politecnico of Milan, Via Ponzio 34/3, 20133 Milan, Italy
| | - M Silari
- CERN, CH-1211 Geneva 23, Switzerland
| | - F Vanhavere
- Dosimetry and Calibration, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, 2400 Mol, Belgium
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De Smet V, Stichelbaut F, Vanaudenhove T, Mathot G, De Lentdecker G, Dubus A, Pauly N, Gerardy I. Neutron H*(10) inside a proton therapy facility: comparison between Monte Carlo simulations and WENDI-2 measurements. Radiat Prot Dosimetry 2014; 161:417-421. [PMID: 24255173 DOI: 10.1093/rpd/nct289] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Inside an IBA proton therapy centre, secondary neutrons are produced due to nuclear interactions of the proton beam with matter mainly inside the cyclotron, the beam line, the treatment nozzle and the patient. Accurate measurements of the neutron ambient dose equivalent H*(10) in such a facility require the use of a detector that has a good sensitivity for neutrons ranging from thermal energies up to 230 MeV, such as for instance the WENDI-2 detector. WENDI-2 measurements have been performed at the Westdeutsches Protonentherapiezentrum Essen, at several positions around the cyclotron room and around a gantry treatment room operated in two different beam delivery modes: Pencil Beam Scanning and Double Scattering. These measurements are compared with Monte Carlo simulation results for the neutron H*(10) obtained with MCNPX 2.5.0 and GEANT4 9.6.
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Affiliation(s)
- V De Smet
- Institut de Recherche de l'Institut Supérieur Industriel de Bruxelles, Département Nucléaire, Rue Royale 150, 1000 Bruxelles, Belgium Université Libre de Bruxelles, Interuniversity Institute for High Energies, Boulevard du Triomphe 2, 1050 Bruxelles, Belgium
| | - F Stichelbaut
- Ion Beam Applications S.A. (IBA), Chemin du Cyclotron 3, 1348 Louvain-la-Neuve, Belgium
| | - T Vanaudenhove
- Université Libre de Bruxelles, Service de Métrologie Nucléaire (CP 165/84), Av. F.D. Roosevelt 50, 1050 Bruxelles, Belgium
| | - G Mathot
- Ion Beam Applications S.A. (IBA), Chemin du Cyclotron 3, 1348 Louvain-la-Neuve, Belgium
| | - G De Lentdecker
- Université Libre de Bruxelles, Interuniversity Institute for High Energies, Boulevard du Triomphe 2, 1050 Bruxelles, Belgium
| | - A Dubus
- Université Libre de Bruxelles, Service de Métrologie Nucléaire (CP 165/84), Av. F.D. Roosevelt 50, 1050 Bruxelles, Belgium
| | - N Pauly
- Université Libre de Bruxelles, Service de Métrologie Nucléaire (CP 165/84), Av. F.D. Roosevelt 50, 1050 Bruxelles, Belgium
| | - I Gerardy
- Institut de Recherche de l'Institut Supérieur Industriel de Bruxelles, Département Nucléaire, Rue Royale 150, 1000 Bruxelles, Belgium
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Slopsema R, Lin L, Mathot G, Adam B, Rexford J, Li Z. SU-FF-T-651: Acceptance and Clinical Commissioning of a Uniform-Scanning Proton Therapy System. Med Phys 2009. [DOI: 10.1118/1.3182149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Harris WV, Bouillon A, Mathot G. Quel est ce Termite Africain? J Appl Ecol 1966. [DOI: 10.2307/2401676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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