X線検出器(輝尽性蛍光体プレート)に付着した放射性同位元素の除染 Radioisotope Decontamination of X-ray Detector (Photostimulable Phosphor Plate)

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著者

    • 小沼 洋治 ONUMA Yoji
    • 独立行政法人労働者健康福祉機構鹿島労災病院放射線科 Radiology Department of Kashima Rosai Hospital of Japan Labour Health and Welfare Organization
    • 林 美智子 HAYASHI Michiko
    • 独立行政法人労働者健康福祉機構鹿島労災病院放射線科 Radiology Department of Kashima Rosai Hospital of Japan Labour Health and Welfare Organization
    • 林 裕晃 [他] HAYASHI Hiroaki
    • 徳島大学大学院ヘルスバイオサイエンス研究部 Institute of Health Biosciences, The University of Tokushima Graduate School
    • 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 Institute of Health Biosciences, The University of Tokushima Graduate School

抄録

We tried to remove contamination of radioisotope (RI) for an X-ray detector (photostimulable phosphor plate; IP) and verified that our procedure suggested by Nishihara et al. was effective for decontamination. The procedure was as follows. First, the IP was kept for approximately twelve hours, and then it was processed [image (A)] as well as a clinical processing mode. Second, using a wet-type chemical wiper, we scavenged the IP to remove the adhered RI on its surface. Then, once again, the IP was kept for approximately fifteen hours and processed [image (B)] in order to check an effect of decontamination. Finally, the two images of (A) and (B) were analyzed using ImageJ, which can be downloaded as a free software, and a percentage of removal was calculated. The procedure was applied to two IPs using the FCR 5501 plus. In the present case, the percentage of removal was approximately 96%. The removed radioisotopes in the chemical wipers were analyzed by Ge detector. Then, <sup>134</sup>Cs and <sup>137</sup>Cs were found with activities of 2.9 4.3 Bq and 3.5 5.2 Bq, respectively. For three months after that, we cannot see black spots on the IPs owing to the contamination of the RI and there are no defects caused by decontamination using a wet-type chemical wiper.

収録刊行物

  • 日本放射線技術學會雜誌

    日本放射線技術學會雜誌 68(3), 277-282, 2012-03-20

    公益社団法人 日本放射線技術学会

参考文献:  11件中 1-11件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10030139340
  • NII書誌ID(NCID)
    AN00197784
  • 本文言語コード
    JPN
  • 資料種別
    NOT
  • ISSN
    03694305
  • NDL 記事登録ID
    023640118
  • NDL 請求記号
    Z19-205
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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