title: Monte Carlo-based calculation of imaging plate response to (90)Sr in teeth: experimental validation of the required correction on sample thickness.
abstract: Recently, a numerical method was proposed to correct the imaging plate (IP) response to (90)Sr concentration in tooth samples, depending on the sample thickness. This is important to quantify any (90)Sr concentration in teeth, which in turn is necessary to determine any (90)Sr incorporation of a person retrospectively. Although the final goal will be to evaluate the (inhomogeneous) spatial distribution of (90)Sr inside tooth samples precisely, the present study was restricted -- as a first step -- to the evaluation of (90)Sr in teeth assuming a uniform (90)Sr distribution. A numerical method proposed earlier was validated experimentally in the present study by measuring the IP response to standard sources of various thicknesses and (90)Sr concentrations. For comparison, the energy deposition of the beta-rays emitted by (90)Sr in the IP -- which is considered to be proportional to the IP luminescence signal -- was calculated for the various sample thicknesses involved, by means of the MCNP-4C code. As a result, the measured IP response could be reproduced by the calculations within the uncertainties, depending on the thickness of the standard sources. Thus, the validity of the proposed numerical method to correct the IP response for sample thickness has successfully been demonstrated.
authors: Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Hiroshima, Japan. tanakake@hiroshima-u.ac.jp
authors: Kenichi
authors: K
authors: Tanaka
authors: Satoru
authors: S
authors: Endo
authors: Shin
authors: S
authors: Toyoda
authors: Eldana
authors: E
authors: Tieliewuhan
authors: Alex
authors: A
authors: Romanyukha
authors: Masaharu
authors: M
authors: Hoshi
mesh_terms: D006801:Humans; D007091:Image Processing, Computer-Assisted; D009010:Monte Carlo Method; D011859:Radiography; D015203:Reproducibility of Results; D013326:Strontium Radioisotopes / Q000032:analysis*; D014070:Tooth / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*
chemical_list: D013326:Strontium Radioisotopes