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Hervé M, Sauzet N, Santos D. On the eptihermal neutron energy limit for Accelerator-Based Boron Neutron Capture Therapy (AB-BNCT): Study and impact of new energy limits. Phys Med 2021; 88:148-157. [PMID: 34265549 DOI: 10.1016/j.ejmp.2021.06.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 06/01/2021] [Accepted: 06/20/2021] [Indexed: 10/20/2022] Open
Abstract
BACKGROUND AND PURPOSE Accelerator-Based Boron Neutron Capture Therapy is a radiotherapy based on compact accelerator neutron sources requiring an epithermal neutron field for tumour irradiations. Neutrons of 10 keV are considered as the maximum optimised energy to treat deep-seated tumours. We investigated, by means of Monte Carlo simulations, the epithermal range from 10 eV to 10 keV in order to optimise the maximum epithermal neutron energy as a function of the tumour depth. METHODS A Snyder head phantom was simulated and mono-energetic neutrons with 4 different incident energies were used: 10 eV, 100 eV, 1 keV and 10 keV. 10B capture rates and absorbed dose composition on every tissue were calculated to describe and compare the effects of lowering the maximum epithermal energy. The Therapeutic Gain (TG) was estimated considering the whole brain volume. RESULTS For tumours seated at 4 cm depth, 10 eV, 100 eV and 1 keV neutrons provided respectively 54%, 36% and 18% increase on the TG compared to 10 keV neutrons. Neutrons with energies between 10 eV and 1 keV provided higher TG than 10 keV neutrons for tumours seated up to 6.4 cm depth inside the head. The size of the tumour does not change these results. CONCLUSIONS Using lower epithermal energy neutrons for AB-BNCT tumour irradiation could improve treatment efficacy, delivering more therapeutic dose while reducing the dose in healthy tissues. This could lead to new Beam Shape Assembly designs in order to optimise the BNCT irradiation.
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Affiliation(s)
- Marine Hervé
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France.
| | - Nadine Sauzet
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - Daniel Santos
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
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Cartelli DE, Capoulat ME, Baldo M, Sandín JCS, Igarzabal M, Grosso MFD, Valda AA, Canepa N, Gun M, Minsky DM, Conti G, Erhardt J, Somacal HR, Bertolo AA, Bergueiro J, Gaviola PA, Kreiner AJ. Status of low-energy accelerator-based BNCT worldwide and in Argentina. Appl Radiat Isot 2020; 166:109315. [PMID: 32966949 DOI: 10.1016/j.apradiso.2020.109315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 11/30/2022]
Abstract
Existing and active low-energy Accelerator-Based BNCT programs worldwide will be reviewed and compared. In particular, the program in Argentina will be discussed which consists of the development of an Electro-Static-Quadrupole (ESQ) Accelerator-Based treatment facility. The facility is conceived to operate with the deuteron-induced reactions 9Be(d,n)10B and 13C(d,n)14N at 1.45 MeV deuteron energy, as neutron sources. Neutron production target development status is specified. The present status of the construction of the new accelerator development laboratory and future BNCT centre is shown.
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Affiliation(s)
- D E Cartelli
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - M E Capoulat
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - M Baldo
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - J C Suárez Sandín
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - M Igarzabal
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - M F Del Grosso
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - A A Valda
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina
| | - N Canepa
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - M Gun
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Facultad de Ingeniería, UBA, Paseo Colón 850, Ciudad Autónoma de Buenos Aires, Argentina
| | - D M Minsky
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - G Conti
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - J Erhardt
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - H R Somacal
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina
| | - A A Bertolo
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - J Bergueiro
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - P A Gaviola
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - A J Kreiner
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina.
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Safavi-Naeini M, Chacon A, Guatelli S, Franklin DR, Bambery K, Gregoire MC, Rosenfeld A. Opportunistic dose amplification for proton and carbon ion therapy via capture of internally generated thermal neutrons. Sci Rep 2018; 8:16257. [PMID: 30390002 PMCID: PMC6215016 DOI: 10.1038/s41598-018-34643-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 10/22/2018] [Indexed: 12/11/2022] Open
Abstract
This paper presents Neutron Capture Enhanced Particle Therapy (NCEPT), a method for enhancing the radiation dose delivered to a tumour relative to surrounding healthy tissues during proton and carbon ion therapy by capturing thermal neutrons produced inside the treatment volume during irradiation. NCEPT utilises extant and in-development boron-10 and gadolinium-157-based drugs from the related field of neutron capture therapy. Using Monte Carlo simulations, we demonstrate that a typical proton or carbon ion therapy treatment plan generates an approximately uniform thermal neutron field within the target volume, centred around the beam path. The tissue concentrations of neutron capture agents required to obtain an arbitrary 10% increase in biological effective dose are estimated for realistic treatment plans, and compared to concentrations previously reported in the literature. We conclude that the proposed method is theoretically feasible, and can provide a worthwhile improvement in the dose delivered to the tumour relative to healthy tissue with readily achievable concentrations of neutron capture enhancement drugs.
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Affiliation(s)
- Mitra Safavi-Naeini
- Australian Nuclear Science and Technology Organisation (ANSTO), Sydney, Australia.
- Centre for Medical Radiation Physics, University of Wollongong, Sydney, Australia.
| | - Andrew Chacon
- Australian Nuclear Science and Technology Organisation (ANSTO), Sydney, Australia
- Centre for Medical Radiation Physics, University of Wollongong, Sydney, Australia
| | - Susanna Guatelli
- Centre for Medical Radiation Physics, University of Wollongong, Sydney, Australia
| | - Daniel R Franklin
- Faculty of Engineering & IT, University of Technology Sydney, Sydney, Australia
| | - Keith Bambery
- Australian Nuclear Science and Technology Organisation (ANSTO), Sydney, Australia
| | - Marie-Claude Gregoire
- Australian Nuclear Science and Technology Organisation (ANSTO), Sydney, Australia
- Centre for Medical Radiation Physics, University of Wollongong, Sydney, Australia
| | - Anatoly Rosenfeld
- Centre for Medical Radiation Physics, University of Wollongong, Sydney, Australia
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