caa a22 4500 445812982 CHVBK 20180317145217.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s00411-011-0358-9 doi (NATIONALLICENCE)springer-10.1007/s00411-011-0358-9 Estimation of background radiation doses for the Peninsular Malaysia's population by ESR dosimetry of tooth enamel [Elektronische Daten] [Mohd Rodzi, Kassym Zhumadilov, Megu Ohtaki, Alexander Ivannikov, Deborshi Bhattacharjee, Akifumi Fukumura, Masaharu Hoshi] Background radiation dose is used in dosimetry for estimating occupational doses of radiation workers or determining radiation dose of an individual following accidental exposure. In the present study, the absorbed dose and the background radiation level are determined using the electron spin resonance (ESR) method on tooth samples. The effect of using different tooth surfaces and teeth exposed with single medical X-rays on the absorbed dose are also evaluated. A total of 48 molars of position 6-8 were collected from 13 district hospitals in Peninsular Malaysia. Thirty-six teeth had not been exposed to any excessive radiation, and 12 teeth had been directly exposed to a single X-ray dose during medical treatment prior to extraction. There was no significant effect of tooth surfaces and exposure with single X-rays on the measured absorbed dose of an individual. The mean measured absorbed dose of the population is 34±6.2mGy, with an average tooth enamel age of 39years. From the slope of a regression line, the estimated annual background dose for Peninsular Malaysia is 0.6±0.3mGyy−1. This value is slightly lower than the yearly background dose for Malaysia, and the radiation background dose is established by ESR tooth measurements on samples from India and Russia. Springer-Verlag, 2011 Rodzi Mohd Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut Zhumadilov Kassym Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut Ohtaki Megu Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut Ivannikov Alexander Medical Radiological Research Center, Korolyov str, 4, 249036, Obninsk, Russia aut Bhattacharjee Deborshi Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut Fukumura Akifumi National Institute of Radiological Sciences, 263-8555, Inage Ku, Chiba, Japan aut Hoshi Masaharu Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut Radiation and Environmental Biophysics Springer-Verlag 50/3(2011-08-01), 451-458 0301-634X 50:3<451 2011 50 411 https://doi.org/10.1007/s00411-011-0358-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00411-011-0358-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rodzi Mohd Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut NATIONALLICENCE 700 1- Zhumadilov Kassym Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut NATIONALLICENCE 700 1- Ohtaki Megu Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut NATIONALLICENCE 700 1- Ivannikov Alexander Medical Radiological Research Center, Korolyov str, 4, 249036, Obninsk, Russia aut NATIONALLICENCE 700 1- Bhattacharjee Deborshi Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut NATIONALLICENCE 700 1- Fukumura Akifumi National Institute of Radiological Sciences, 263-8555, Inage Ku, Chiba, Japan aut NATIONALLICENCE 700 1- Hoshi Masaharu Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami Ku., 734-8553, Hiroshima, Japan aut NATIONALLICENCE 773 0- Radiation and Environmental Biophysics Springer-Verlag 50/3(2011-08-01), 451-458 0301-634X 50:3<451 2011 50 411 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer