歯科Ｘ線撮影のリスクの推定，１９８７　第２報　国民線量とリスクについて

DOI

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タイトル別名
  • Estimation of stochastic risks occured by dental radiographic examination in Japan, 1987. Part 2. Estimation of pupulation doses and stochastic risks.

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The population doses (Genetically significant doses (GSD), per Caput mean bone marrow dose (CMD), Leukemia significant dose (LSD), and Malignant significant dose (MSD)) and stochastic risks from dental radiographic examinations were estimated on the basis of a nationwide survey in Japan 1987. The organ or tissue doses related to the stochastic effects with intra-oral and panoramic examinations were determined using ionization chambers and thermoluminescent dosimeters placed in the RANDO-Woman-phantom. The phantom was exposed with dental x-rays under the condition of 60kV and 10mA and panoramic x-rays of 85kV, 10mA. The risk factors of the genetic effects, the leukemia and the fatal malignant diseases were estimated from the results of a nationwide survey. The effective dose related to MSD and the effective dose equivalent recommended by the International Commission on Radiological Protection (ICRP) were calculated using weighting factors and the organ or tissue doses.<br>The annual population doses per person were calculated as 98nGy for GSD, 8.5μGy for CMD, 7.5μGy for LSD and 7.1μGy for MSD from intra-oral radiography and 6nGy for GSD, 2.3μGy for CMD, 2.1μGy for LSD and 1.3μGy for MSD from panoramic radiography, respectively. The collective ffective dose equivalents were calculated as 2370man·Sv for intra-oral radiography and 470man·Sv for panoramic radiography. The resultant annual risks of population from intra-oral and panoramic radiography were estimated to be 0.17 for genetic effects, 2.3 for leukemia and 16.7 for fatal malignant diseases.

収録刊行物

  • 歯科放射線

    歯科放射線 29 (2), 245-251, 1989

    特定非営利活動法人 日本歯科放射線学会

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