逐次近似応用再構成法が超急性期脳梗塞CT 画像におけるZ スコアマッピングに与える効果 Impact to Z-score Mapping of Hyperacute Stroke Images by Computed Tomography in Adaptive Statistical Iterative Reconstruction

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著者

    • 渡邊 翔太 Watanabe Shota
    • 近畿大学高度先端総合医療センターPET 分子イメージング部|金沢大学大学院医薬保健学総合研究科保健学専攻 Division of Positron Emission Tomography, Institute of Advanced Clinical Medicine, Kindai University|Graduate School of Medical Science, Kanazawa University
    • 細野 眞 Hosono Makoto
    • 近畿大学高度先端総合医療センターPET 分子イメージング部|近畿大学医学部放射線医学教室放射線診断学部門 Division of Positron Emission Tomography, Institute of Advanced Clinical Medicine, Kindai University|Department of Radiology, Kindai University School of Medicine
    • 石井 一成 Ishii Kazunari
    • 近畿大学高度先端総合医療センターPET 分子イメージング部|近畿大学医学部放射線医学教室放射線診断学部門 Division of Positron Emission Tomography, Institute of Advanced Clinical Medicine, Kindai University|Department of Radiology, Kindai University School of Medicine
    • 村上 卓道 Murakami Takamichi
    • 近畿大学高度先端総合医療センターPET 分子イメージング部|近畿大学医学部附属病院中央放射線部|近畿大学医学部放射線医学教室放射線診断学部門 Division of Positron Emission Tomography, Institute of Advanced Clinical Medicine, Kindai University|Department of Central Radiology, Kindai University Hospital|Department of Radiology, Kindai University School of Medicine

抄録

<p>The purpose of this study was to evaluate the effect of a hybrid-type iterative reconstruction method on Z-score mapping of hyperacute stroke in unenhanced computed tomography (CT) images. We used a hybrid-type iterative reconstruction [adaptive statistical iterative reconstruction (ASiR)] implemented in a CT system (Optima CT660 Pro advance, GE Healthcare). With 15 normal brain cases, we reconstructed CT images with a filtered back projection (FBP) and ASiR with a blending factor of 100% (ASiR100%). Two standardized normal brain data were created from normal databases of FBP images (FBP-NDB) and ASiR100% images (ASiR-NDB), and standard deviation (SD) values in basal ganglia were measured. The Z-score mapping was performed for 12 hyperacute stroke cases by using FBP-NDB and ASiR-NDB, and compared Z-score value on hyperacute stroke area and normal area between FBP-NDB and ASiR-NDB. By using ASiR-NDB, the SD value of standardized brain was decreased by 16%. The Z-score value of ASiR-NDB on hyperacute stroke area was significantly higher than FBP-NDB (<i>p</i><0.05). Therefore, the use of images reconstructed with ASiR100% for Z-score mapping had potential to improve the accuracy of Z-score mapping.</p>

収録刊行物

  • 日放技学誌

    日放技学誌 74(4), 375-381, 2018

    公益社団法人 日本放射線技術学会

各種コード

  • NII論文ID(NAID)
    130006712082
  • NII書誌ID(NCID)
    AN00197784
  • 本文言語コード
    JPN
  • ISSN
    0369-4305
  • NDL 記事登録ID
    029024766
  • NDL 請求記号
    Z19-205
  • データ提供元
    NDL  J-STAGE 
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