ホットスポットファントムを用いたOSEM再構成画像の基礎的検討 : iteration回数およびsubset数の評価

• 丸 繁勘

  千葉県循環器病センター放射線科

• 柳沢 正道

  千葉県循環器病センター放射線科

書誌事項

タイトル別名

• Basic Evaluation of OSEM Algorithm by Assessing Iteration Times and Number of Subsets in a Hot Spot Phantom Study

抄録

To investigate optimal iteration times and the number of subsets on OSEM(ordered subsets expectation maximization), we estimated the values of the target-to-background ratio(T/B), signal-to-noise ratio(S/N), and NMSE(normalized mean square error). We acquired SPECT data with four scan durations, 5, 10, 15, and 20 min, using a three-headed SPECT scanner(GCA-9300 A/UI, Toshiba Co., Ltd.), and reconstructed the OSEM algorithm varying iteration and subset numbers. We determined the optimal values of T/B, S/N, and NMSE for OSEM, and compared these by filtered back projection(FBP). We observed the same convergence propotity between OSEM and FBP. We evaluated this by comparing it with the FBP method to obtain the most appropriate parameter from 36 kinds of SPECT images. In the spherical hot spot phantom study, the values of 2 and 15 were optimum for iteration times and number of subsets, respectively.

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 57 (10), 1233-1239, 2001

  公益社団法人 日本放射線技術学会

キーワード

• Ordered subsets expectation maximization(OSEM)
• Filtered back projection(EBP)
• Butterworth filter
• Signal-to-noise ratio(S
• N)
• Normalized mean square error(NMSE)

詳細情報

• CRID: 1390282681366728448
• NII論文ID: 110003460196
• NII書誌ID: AN00197784
• DOI: 10.6009/jjrt.kj00003110968
• ISSN: 18814883
• ISSN: 03694305
• ISSN: http://id.crossref.org/issn/03694305
• Web Site: https://www.jstage.jst.go.jp/article/jjrt/57/10/57_KJ00003110968/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2002087159
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可