骨SPECT 定量における異なる校正用線源の相互校正の精度

• 宮司 典明

  公益財団法人がん研究会有明病院画像診断センター核医学チーム

• 三輪 建太

  国際医療福祉大学保健医療学部

• 茂木 一樹

  公益財団法人がん研究会有明病院画像診断センター核医学チーム

• 梅田 拓朗

  公益財団法人がん研究会有明病院画像診断センター核医学チーム

• 我妻 慧

  東京都健康長寿医療センター研究所神経画像研究チーム

• 深井 翔平

  公益財団法人がん研究会有明病院画像診断センター核医学チーム

• 滝口 智洋

  公益財団法人がん研究会有明病院画像診断センター核医学チーム

• 寺内 隆司

  公益財団法人がん研究会有明病院画像診断センター核医学チーム

• 小泉 満

  公益財団法人がん研究会有明病院画像診断センター核医学チーム

書誌事項

タイトル別名

• Validation of Cross-calibration Schemes for Quantitative Bone SPECT/CT Using Different Sources under Various Geometric Conditions
• ホネ SPECT テイリョウ ニ オケル コトナル コウセイヨウセン ゲン ノ ソウゴ コウセイ ノ セイド

抄録

Purpose: Several cross-calibration schemes have been proposed to produce quantitative values in bone SPECT imaging. Differences in the radionuclide sources and geometric conditions can decrease the accuracy of cross-calibration factor (CCF). The present study aimed to validate the effects of calibration schemes using different sources under various geometric conditions. Methods: Temporal variations as well as variations in acquisition counts and the shapes of ⁵⁷Co standard and ^99mTc point sources and a ^99mTc disk source were determined. The effects of the geometric conditions of the source-to-camera distance (SCD) and lateral distance on the CCF were investigated by moving the camera or source away from the origin. The system planar sensitivity of NEMA incorporated into a Symbia Intevo SPECT/CT device (Siemens®) was defined as reference values. Results: The temporal variation in CCF using the ⁵⁷Co source was relatively stable within the range of 0.7% to 2.3%, whereas the ^99mTc source ranged from 2.7% to 7.3%. In terms of source shape, the ⁵⁷Co standard point source was the most stable. Both SCD and lateral distance decreased as a function of distance from the origin. Errors in the geometric condition were higher for the ⁵⁷Co standard point source than the ^99mTc disk source. Conclusions: Different calibration schemes influenced the reliability of quantitative values. The ⁵⁷Co standard point source was stable over a long period, and this helped to maintain the quality of quantitative SPECT/CT imaging data. The CCF accuracy of the ^99mTc source decreased depending on the preparative method. The method of calibration for quantitative SPECT should be immediately standardized to eliminate uncertainty.

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 73 (6), 443-450, 2017

  公益社団法人 日本放射線技術学会

キーワード

• cross-calibration
• quantification
• bone SPECT/CT
• calibration error
• planar sensitivity

詳細情報

• CRID: 1390282681338448512
• NII論文ID: 130007324260
• NII書誌ID: AN00197784
• DOI: 10.6009/jjrt.2017_jsrt_73.6.443
• ISSN: 18814883
• ISSN: 03694305
• NDL書誌ID: 028356317
• PubMed: 28637958
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028356317
• Web Site: https://www.jstage.jst.go.jp/article/jjrt/73/6/73_2017_JSRT_73.6.443/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2017388787
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • PubMed
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可