数値ファントムを用いた最新鋭SPECTの位置分解能補正の基礎的検討

• 大西 英雄

  県立広島大学大学院総合学術研究科保健福祉学専攻

• 本村 信篤

  東芝メディカルシステムズ株式会社CT・核医学開発担当

• 藤埜 浩一

  大阪大学医学部付属病院医療技術部放射線部門

• 夏目 貴弘

  藤田保健衛生大学医療科学部放射線学科

• 原本 泰博

  広島赤十字・原爆病院放射線部

書誌事項

タイトル別名

• Evaluation of Commercial Resolution Recovery Techniques in Four State-of-the-art Single Photon Emission Computed Tomography Systems Using a Digital Phantom Model
• スウチ ファントム オ モチイタ サイシンエイ SPECT ノ イチ ブンカイノウ ホセイ ノ キソテキ ケントウ

抄録

Purpose: This study aims to evaluate the fundamental performance of four leading advanced resolution recovery methods. Method: To evaluate the performance of the resolution recovery algorithm, we carried out the computer simulation with the cone/sphere digital phantoms. These phantoms were used to investigate the basic properties of those algorithms. The software of four packages (advance) were also tested, specifically Astonish^TM (AST), Evolution^TM (EVL), Flash-3D^TM (FL3), and 3D-OSEM (3DOS). The performance was evaluated in the collimator systems (LEHR) reconstruction conditions using the full width at half maxi am (FWHM), aspect ratio (ASR), and artifacts of conical part. Result: In the “without BG,” FWHM of the advance method indicated a true-FWHM with SI (subset×iteration)=20, 40. As SI increased, FWHM was composed with over estimate. Each advances of FWHM indicated only 5% of improvement as compared with reference FWHM in the “with BG.” The ASR increased 20% to AST, FL3, and ASR of 3DOS remained in 10% in the outside. As for the reproducibility of the conical part, an artifact was caused by the FL3, EVL, and AST methods. This artifact did not occur in 3DOS. Discussions: An SI needs more than 150 to obtain an accurate compensation effect. As for the advance method, the major compensation effect was not demonstrated very much as compared with the OS-EM. The EVL, FL3, and AST overestimated values due to a Gibb’s oscillation in the artifacts of the conical part.

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 68 (6), 686-696, 2012

  公益社団法人 日本放射線技術学会

キーワード

• resolution recovery
• reconstruction
• single photon emission computed tomography (SPECT)
• image quality

詳細情報

• CRID: 1390001206361162496
• NII論文ID: 10030496575
• NII書誌ID: AN00197784
• DOI: 10.6009/jjrt.2012_jsrt_68.6.686
• COI: 1:STN:280:DC%2BC38fgslCkuw%3D%3D
• ISSN: 18814883
• ISSN: 03694305
• NDL書誌ID: 023875465
• PubMed: 22805445
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023875465
• Web Site: https://search.jamas.or.jp/link/ui/2012285623
• 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