Development of a Neutron Radiography System at the Musashi Institute of Technology Research Reactor

Matsumoto, Tetsuo; Aizawa, Otohiko; Watanabe, Shigeru

doi:10.1007/978-94-009-3871-7_21

Cited by 2 publications

(3 citation statements)

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“…These spectra were obtained with the SPEC-4 code (see Benjamin et a1 1968) which unfolded the pulse height distributions obtained by the proton recoil counter at the head phantom position. In addition to these beams, we obtained a high purity thermal neutron beam by removing both cadmium and titanium filters from the configuration of the silicon filter components, because the monocrystal silicon has a small cross section in the thermal neutron energy range (see Aizawa and Matsumoto 1986).…”

Section: Filtered Beam Neutron Experimentsmentioning

confidence: 99%

“…The thermal neutron fluence rate and gamma dose rate within the phantom were measured with the thermoluminescent dosemeters (TLD) of both Mg,SiO,: T~(Mso-S) and Mg,Si0,:6LiF(Mso-LiF) (see Matsumoto and Aizawa 1986). The thermal neutron responses to these TLD were 0.28 and 290 R ( 1 R = 2.58 x lo-, C kg-') for a thermal neutron fluence of 10" n cm-2, respectively.…”

Section: Filtered Beam Neutron Experimentsmentioning

confidence: 99%

“…The neutron fluence available and required for this therapy is about 2.5 x lo'* n cm-* in the tumour and is limited to about 2 x l O I 3 n cm-2 at the brain surface. The neutron intensity in the brain is influenced by many factors, such as the distance between the patient's head and the irradiation port and the size of the irradiation field (see Aizawa er a1 1980, Matsumoto andAizawa 1985). It is necessary to know the thermal neutron distributions in the brain as a function of the aperture size of the collimator.…”

Section: Introductionmentioning

confidence: 99%

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Head phantom experiment and calculation for boron neutron capture therapy

Matsumoto¹,

Aizawa²

1988

Phys. Med. Biol.

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Head phantom experiments with various neutron beams and calculations were carried out in order to provide useful information for boron neutron capture therapy (BNCT). Thermal neutron beams for thermal neutron capture therapy were used for phantom experiments with various neutron collimator aperture sizes. The filtered beam neutrons of 24 and 144 keV generated with iron and silicon filters were also used to investigate the possible application of BNCT in the treatment of deep-seated cancers. Thermal neutron fluence and induced capture gamma dose distributions within the phantom were calculated with a transport code DOT 3.5 and compared with the experimental results. The results showed that the calculation used was consistent with the experimental results and provided useful information on BNCT. The filtered beam neutron may be very useful for the treatment of deep or widespread cancer, if there were a high power research reactor constructed for this purpose.

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Section: Filtered Beam Neutron Experimentsmentioning

confidence: 99%

Section: Filtered Beam Neutron Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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