【7/12更新】2022年4月1日からのCiNii ArticlesのCiNii Researchへの統合について

Usefulness of monochromatic imaging with metal artifact reduction software for computed tomography angiography after intracranial aneurysm coil embolization

  • Yuki Shinohara
    Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Japan
  • Makoto Sakamoto
    Division of Neurosurgery, Department of Neurological Sciences, Faculty of Medicine, Tottori University, Japan
  • Naoki Iwata
    Division of Clinical Radiology, Tottori University Hospital, Yonago, Japan
  • Junichi Kishimoto
    Division of Clinical Radiology, Tottori University Hospital, Yonago, Japan
  • Keita Kuya
    Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Japan
  • Shinya Fujii
    Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Japan
  • Toshio Kaminou
    Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Japan
  • Takashi Watanabe
    Division of Neurosurgery, Department of Neurological Sciences, Faculty of Medicine, Tottori University, Japan
  • Toshihide Ogawa
    Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Japan

抄録

<jats:sec><jats:title>Background</jats:title><jats:p> Recently, a newly developed fast-kV switching dual energy CT scanner with a gemstone detector generates virtual high keV images as monochromatic imaging (MI). Each MI can be reconstructed by metal artifact reduction software (MARS) to reduce metal artifact. </jats:p></jats:sec><jats:sec><jats:title>Purpose</jats:title><jats:p> To evaluate the degree of metal artifacts reduction and vessel visualization around the platinum coils using dual energy CT with MARS. </jats:p></jats:sec><jats:sec><jats:title>Material and Methods</jats:title><jats:p> Dual energy CT was performed using a Discovery CT750 HD scanner (GE Healthcare, Milwaukee, WI, USA). In a phantom study, we measured the mean standard deviation within regions of interest around a 10-mm-diameter platinum coil mass on MI with and without MARS. Thirteen patients who underwent CTA after endovascular embolization for cerebral aneurysm with platinum coils were included in a clinical study. We visually assessed the arteries around the platinum coil mass on MI with and without MARS. </jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p> Each standard deviation near the coil mass on MI with MARS was significantly lower than that without MARS in a phantom study. On CTA of a clinical study, better visibility of neighboring arteries was obtained in 11 of 13 patients on MI with MARS compared to without MARS due to metal artifact reduction. Conclusion: Dual energy CT with MARS reduces metal artifact of platinum coils, resulting in favorable vessel visualization around the coil mass on CTA after embolization. </jats:p></jats:sec>

収録刊行物

  • Acta Radiologica

    Acta Radiologica 55 (8), 1015-1023, 2014-10

    SAGE Publications

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