title: IN-VIVO RADIATION DOSIMETRY USING PORTABLE L BAND EPR: ON-SITE MEASUREMENT OF VOLUNTEERS IN FUKUSHIMA PREFECTURE, JAPAN.
abstract: The aim of this study was to make direct measurements of the possible radiation-induced EPR signals in the teeth of volunteers who were residents in Fukushima within 80 km distance from the Fukushima Nuclear Power plant at the time of the disaster, and continued to live there for at least 3 month after the disaster. Thirty four volunteers were enrolled in this study. These measurements were made using a portable L-band EPR spectrometer, which was originally developed in the EPR Center at Dartmouth. All measurements were performed using surface loop resonators that have been specifically designed for the upper incisor teeth. Potentially these signals include not only radiation-induced signals induced by the incident but also background signals including those from prior radiation exposure from the environment and medical exposure. We demonstrated that it is feasible to transport the dosimeter to the measurement site and make valid measurements. The intensity of the signals that were obtained was not significantly above those seen in volunteers who had not had potential radiation exposures at Fukushima.
authors: Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Kagawa University, 750-1 Ikenobe, Miki-cho, Kita-gun , Kagawa Prefecture 761-0793, Japan dentmm@med.kagawa-u.ac.jp.
authors: Minoru
authors: M
authors: Miyake
authors: Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Kagawa University, 750-1 Ikenobe, Miki-cho, Kita-gun , Kagawa Prefecture 761-0793, Japan.
authors: Yasuhiro
authors: Y
authors: Nakai
authors: Department of Environmental Health, NIPH (National Institute of Public Health ), 2-3-6 Minami, Wako-shi , Saitama 351-0197, Japan.
authors: Ichiro
authors: I
authors: Yamaguchi
authors: EPR group in the Division of Bioengineering and Bioinformatics, Hokkaido University, Kita 14, Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0814, Japan.
authors: Hiroshi
authors: H
authors: Hirata
authors: Department of Environmental Health, NIPH (National Institute of Public Health ), 2-3-6 Minami, Wako-shi , Saitama 351-0197, Japan.
authors: Naoki
authors: N
authors: Kunugita
authors: Dartmouth EPR Center, Department of Radiology, The Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA.
authors: Benjamin B
authors: BB
authors: Williams
authors: Dartmouth EPR Center, Department of Radiology, The Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA.
authors: Harold M
authors: HM
authors: Swartz
mesh_terms: D001681:Biological Assay / Q000295:instrumentation*; D004578:Electron Spin Resonance Spectroscopy / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D062406:Fukushima Nuclear Accident; D006801:Humans; D008297:Male; D008872:Microwaves; D008875:Middle Aged; D008904:Miniaturization; D011829:Radiation Dosage; D000069079:Radiation Exposure / Q000032:analysis*; D011874:Radiometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014070:Tooth / Q000737:chemistry* / Q000528:radiation effects*