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  [in Japanese] Evaluation of Commercial Resolution Recovery Techniques in Four State-of-the-art Single Photon Emission Computed Tomography Systems Using a Digital Phantom Model  [in Japanese]

Access this Article

Author(s)

    • 大西 英雄 ONISHI Hideo
    • 県立広島大学大学院総合学術研究科保健福祉学専攻 Program in Health and Welfare, Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima
    • 本村 信篤 MOTOMURA Nobutoku
    • 東芝メディカルシステムズ株式会社CT・核医学開発担当 Division of CT & Nuclear Medicine, Toshiba Medical Systems Co.
    • 夏目 貴弘 NATSUME Takahiro
    • 藤田保健衛生大学医療科学部放射線学科 Faculty of Radiological Technology, Fujita Health University School of Health Science

Abstract

<i>Purpose</i>: This study aims to evaluate the fundamental performance of four leading advanced resolution recovery methods. <i>Method</i>: 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<sup>TM</sup> (AST), Evolution<sup>TM</sup> (EVL), Flash-3D<sup>TM</sup> (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. <i>Result</i>: 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. <i>Discussions</i>: 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.

Journal

  • Japanese Journal of Radiological Technology

    Japanese Journal of Radiological Technology 68(6), 686-696, 2012-06-20

    Japanese Society of Radiological Technology

References:  17

Cited by:  1

Codes

  • NII Article ID (NAID)
    10030496575
  • NII NACSIS-CAT ID (NCID)
    AN00197784
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03694305
  • NDL Article ID
    023875465
  • NDL Call No.
    Z19-205
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
Page Top