診療画像中に発生した黒点の原因となる放射性同位元素の付着部位に関する推定実験  [in Japanese] An Experiment to Estimate Locations of Radioisotopes Producing Black Spots on Medical Images  [in Japanese]

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Author(s)

    • 西原 貞光 NISHIHARA Sadamitsu
    • 徳島大学大学院ヘルスバイオサイエンス研究部保健科学部門 Subdivision of Biomedical Information Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School
    • 林 裕晃 HAYASHI Hiroaki
    • 徳島大学大学院ヘルスバイオサイエンス研究部保健科学部門 Subdivision of Biomedical Information Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School

Abstract

Caused by the accident of nuclear power plants in the Fukushima at 2011, many radioisotopes (RI) were diffused to the environment. As a result, X-ray detectors were stained with RIs and black spots appeared on the medical images. Using the RI of <sup>134</sup>Cs and <sup>137</sup>Cs, black spots which appeared on the photostimulable phosphor plate (X-ray detector) were reproduced experimentally. The aim of this study is the following two points; firstly, to clarify the relationship between long-time irradiations of RI and fading effect, and secondly, to clarify the positional relationship between the RI sources and the X-ray detector based on irradiation times of RI. For the latter experiment, the samples were made by spraying water (containing the RI) in order to reproduce small point sources. Then, the sources were placed on the photostimulable phosphor plate or on the cassette, and corresponding images with different irradiation times were taken. The black spots could be reproduced with the condition, in which sources were directly adhered to the photostimulable phosphor plate. We observed the black spots when sources were placed on the cassette for one week. Based on the result, we summarized that the RI which are directly adhered on the photostimulable phosphor plate may produce the black spots.

Journal

  • Japanese Journal of Radiological Technology

    Japanese Journal of Radiological Technology 68(10), 1307-1313, 2012-10-20

    Japanese Society of Radiological Technology

References:  11

Codes

  • NII Article ID (NAID)
    10031082125
  • NII NACSIS-CAT ID (NCID)
    AN00197784
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    03694305
  • NDL Article ID
    024064606
  • NDL Call No.
    Z19-205
  • Data Source
    CJP  NDL  IR  J-STAGE 
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