Availability of in-vivo Measurement with Multipoint Vibration System for MR Elastography

DOI
  • Ozawa Shinya
    Graduate School of Engineering, Chiba University
  • Suga Mikio
    Graduate School of Engineering, Chiba University Molecular Imaging Center, National Institute of Radiological Sciences
  • Kobayashi Etsuko
    School of Engineering, The University of Tokyo
  • Arai Ken
    Graduate School of Engineering, Chiba University
  • Ikeda Hajime
    Faculty of Engineering, Chiba University
  • Hirano Masaya
    GE Healthcare Japan Corporation
  • Obata Takayuki
    Molecular Imaging Center, National Institute of Radiological Sciences

Bibliographic Information

Other Title
  • MRE用多点加振システムの生体に対する有効性評価

Abstract

Magnetic resonance elastography (MRE) is a MRI technique that can noninvasively visualize waves within tissue. The tissue stiffness is calculated by the equations of motion from the wave pattern. The physical attenuation of the propagating waves due to viscous losses of wave energy and geometric dispersion of wave fronts can cause the tissues distant from the wave source to have very low amplitude wave motion. This decreases the accuracy of the inversion results due to the increased impact of noise in the data. To address these limitations, multipoint vibration system with 4 drivers was developed.MRE performed on a healthy adult (age 21, male) placed 1 or 4 drivers along the upper abdominal wall. Same vibration energy was applied for the target. A vibration energy map was derived from wave images. The ratio of 4 to 1 driver's amplitude is 74% near the surface, 168% in a deep area. The results show multipoint vibration system is useful when the target tissue is in a deep area.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390282680570951936
  • NII Article ID
    130004604724
  • DOI
    10.11345/japannctam.60.0.174.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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