Development of real-time thermal neutron monitor using boron-loaded plastic scintillator with optical fiber for boron neutron capture therapy

Ishikawa, Masayori; Ono, Koji; Sakurai, Yoshinori; Unesaki, Hironobu; Uritani, Akira; Bengua, Gerard; Kobayashi, Tooru; Tanaka, Kenichi; Kosako, Toshiso

doi:10.1016/j.apradiso.2004.05.053

Cited by 34 publications

(27 citation statements)

References 5 publications

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“…The activation foil method using Au and Mn, as well as TLDs, is commonly used in the measurement of surface dose during epi-thermal neutron irradiation. Surface dose measurements using an online scintillating optical fiber have also been reported [39].…”

Section: Dose Monitoring Under Irradiationmentioning

confidence: 98%

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Advances in boron neutron capture therapy (BNCT) at kyoto university - From reactor-based BNCT to accelerator-based BNCT

Sakurai

Tanaka

Takata

et al. 2015

Journal of the Korean Physical Society

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At the Kyoto University Research Reactor Institute (KURRI), a clinical study of boron neutron capture therapy (BNCT) using a neutron irradiation facility installed at the research nuclear reactor has been regularly performed since February 1990. As of November 2014, 510 clinical irradiations were carried out using the reactor-based system. The world's first accelerator-based neutron irradiation system for BNCT clinical irradiation was completed at this institute in early 2009, and the clinical trial using this system was started in 2012. A shift of BCNT from special particle therapy to a general one is now in progress. To promote and support this shift, improvements to the irradiation system, as well as its preparation, and improvements in the physical engineering and the medical physics processes, such as dosimetry systems and quality assurance programs, must be considered.

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Section: Dose Monitoring Under Irradiationmentioning

confidence: 98%

“…We should note that TLDs cannot be placed near the activation foils because the secondary gamma-rays generated from the foils would influence the TLD measured data. In addition to foils and TLDs, some studies have reported on the use of ionization chambers and scintillating fibers in the measurement of the dose in-phantom [39].…”

Section: Beam Characterizationmentioning

confidence: 99%

Advances in boron neutron capture therapy (BNCT) at kyoto university - From reactor-based BNCT to accelerator-based BNCT

Sakurai

Tanaka

Takata

et al. 2015

Journal of the Korean Physical Society

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“…(1,2) These types of sensors are immune to environmental influences such as pressure, humidity, and electromagnetic field. (3)(4)(5) In addition, their small radii and thinness make it possible to detect neutrons with high spatial resolution in a narrow space.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Thermal Neutron Induced Electron Fluxes Generated in a Fiber-Optic Cerenkov Radiation Sensor Using Monte Carlo N-Particle Transport Code

2016

Sensors and Materials

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The purpose of this research is to develop a fiber-optic Cerenkov radiation sensor (FOCRS) for detecting thermal neutrons in mixed radiation fields. Thus, we designed a probe for FOCRS to detect thermal neutrons and background gamma rays using a Gd-157 foil and rutile crystal. A probe for a reference sensor to detect gamma rays was also designed with a rutile crystal. To clarify the relationship between electron fluxes and intensities of Cerenkov radiation, the electron fluxes inducing Cerenkov radiation in the probes of FOCRS and the reference sensor were calculated using Monte Carlo N-particle transport code (MCNPX) simulations.

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“…On the other hand, real time neutron flux monitoring is ideal for this therapy. Accordingly, neutron dosimeters based on a scintillating glass optical fiber [12] or a boron-loaded plastic scintillator with an optical fiber [13] were developed. Although, these dosimeters are very effective, higher spatial resolution and measurement at multi points are required.…”

Section: Introductionmentioning

confidence: 99%

Development of a radiation detector made of a cubic boron nitride polycrystal

Kaneko

Taniguchi

Kawamura

et al. 2007

Nuclear Instruments and Methods in Physics Research Section A:

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Radiation detectors were fabricated using single and polycrystalline cubic boron nitride crystals synthesized using a high-pressure and high-temperature method. Although cBN single crystals obtained using a barium BN solvent system were nearly colorless and displayed high electrical resistance, in contrast to conventional amber colored crystals, the single crystals exhibit a leakage current that renders them unsuitable for use in a detector. In contrast, a detector made of a cBN polycrystal synthesized by direct transformation had a very low leakage current of 0.2 pA with bias voltage of 100 V; it functioned as a radiation detector. From an experiment using alpha particles, holes traversed a longer distance than electrons. It had a fast rise time of approximately 300 ns. The detector also showed sensitivity to neutrons. However, output signals were smaller than the expected voltage from the experiment using alpha particles, probably because of charge accumulation from the high neutron flux.

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Development of real-time thermal neutron monitor using boron-loaded plastic scintillator with optical fiber for boron neutron capture therapy

Cited by 34 publications

References 5 publications

Advances in boron neutron capture therapy (BNCT) at kyoto university - From reactor-based BNCT to accelerator-based BNCT

Advances in boron neutron capture therapy (BNCT) at kyoto university - From reactor-based BNCT to accelerator-based BNCT

Calculation of Thermal Neutron Induced Electron Fluxes Generated in a Fiber-Optic Cerenkov Radiation Sensor Using Monte Carlo N-Particle Transport Code

Development of a radiation detector made of a cubic boron nitride polycrystal

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