ドーズキャリブレータの測定精度および施設間差の評価

• 松友 紀和

  倉敷中央病院放射線技術部(現杏林大学保健学部診療放射線技術学科) 九州大学大学院医学系学府保健学専攻

• 甲谷 理温

  川崎医科大学附属病院中央放射線部 県立広島大学大学院総合学術研究科生命システム科学専攻

• 矢田 伸広

  県立広島大学大学院総合学術研究科生命システム科学専攻 島根大学医学部附属病院放射線部

• 見田 秀次

  県立広島病院放射線診断科 県立広島大学大学院総合学術研究科保健福祉学専攻

• 甲斐 勇二

  ジェイアール広島病院放射線科

• 前田 幸人

  香川大学医学部附属病院放射線部

• 酒井 崇行

  労働者健康福祉機構九州労災病院中央放射線部

• 大西 英雄

  県立広島大学大学院総合学術研究科生命システム科学専攻

• 佐々木 雅之

  九州大学大学院医学系学府保健学専攻

書誌事項

タイトル別名

• Evaluation of Measurement Accuracy and Inter-institutional Comparison for Dose Calibrators
• 臨床技術 ドーズキャリブレータの測定精度および施設間差の評価
• リンショウ ギジュツ ドーズキャリブレータ ノ ソクテイ セイド オヨビ シセツ カンサ ノ ヒョウカ

抄録

Purpose: The aim of this study was to validate the reliability of dose calibrators for measuring the radioactivity of several radioisotopes in multi-institution. Methods: We evaluated the measurement accuracy of dose calibrators using a commercially available source (⁶⁷ Ga, ^99m Tc, ¹²³ I, ²⁰¹ TL). Nine dose calibrators (five models) in seven institutions were performed in this study. Each source was measured at least 3 times a day over a period of 4 half-life. Linearity of concentration (%error value) and percent difference values (%diff measurement) between measured and estimated radioactivity were calculated to evaluate the measurement accuracy. In addition, difference among institutions (%diff institution) was evaluated by the error values between measured and reference institution values. Results: Good linearity of concentration was found between measured and estimated radioactivity in ^99mTc and ¹²³I. However, %error value was increased in ⁶⁷Ga and ²⁰¹TL (maximum 19.3%). %diff measurements were 1.9 ± 0.3% for ⁶⁷Ga, −0.9 ± 0.3% for ^99mTc, 2.2 ± 0.4% for ¹²³I, and −0.7 ± 0.3% for ²⁰¹TL, respectively. Although there were no clear differences in six institutions, %diff institution in one institution tended to be higher than that obtained in other institutions. Conclusions: Our results indicated that measurement accuracy of nine dose calibrators (five models) was relatively stable. However, difference of measured values tended to be higher in a part of institution and source. It is important to perform quality assurance and quality control for dose calibrator using traceable source.

収録刊行物

• 日本放射線技術学会雑誌

  日本放射線技術学会雑誌 72 (5), 410-415, 2016

  公益社団法人 日本放射線技術学会

キーワード

• dose calibrator
• quality assurance/quality control
• reliability
• measurement
• single photon emission computed tomography

詳細情報

• CRID: 1390282681340211200
• NII論文ID: 130005152033
• NII書誌ID: AN00197784
• DOI: 10.6009/jjrt.2016_jsrt_72.5.410
• ISSN: 18814883
• ISSN: 03694305
• NDL書誌ID: 027451860
• PubMed: 27211086
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027451860
• Web Site: https://www.jstage.jst.go.jp/article/jjrt/72/5/72_2016_JSRT_72.5.410/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2016318653
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • PubMed
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可