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Microdosimetric spectra of the THOR neutron beam for boron neutron capture therapy

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Author(s)

F Y Hsu, C J Tung, D E Watt

School/Research organisations

Abstract

A primary objective of the BNCT project in Taiwan, involving THOR (Tsing Hun Open Pool Reactor), was to examine the potential treatment of hepatoma. To characterise the epithermal neutron beam in THOR, the microdosimetry distributions in lineal energy were determined using paired tissue-equivalent proportional counters with and without boron microfoils. Microdosimetry results were obtained in free-air and at various depths in a PMMA phantom near the exit of the beam port. A biological weighting function, dependent on lineal energy, was used to estimate the relative biological effectiveness of the beam. An effective RBE of 2.7 was found at several depths in the phantom.

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Details

Original languageEnglish
Pages (from-to)121-126
Number of pages6
JournalRadiation Protection Dosimetry
Volume104
Publication statusPublished - 2003

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