Influence of Vibration Waveform on MR Elastography

DOI Web Site Web Site PubMed 5 References
  • Tanaka Michitaka
    Department of Radiological Sciences, Faculty of Health Sciences, Tokyo Metropolitan University (Current address: Department of Radiology, Dokkyo Medical University Saitama Medical Center)
  • Numano Tomokazu
    Department of Radiological Sciences, Faculty of Health Sciences, Tokyo Metropolitan University Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
  • Habe Tetsushi
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
  • Ito Daiki
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
  • Maeno Toshiki
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
  • Ueki Takamichi
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
  • Igarashi Keisuke
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
  • Mizuhara Kazuyuki
    Department of Mechanical Engineering, School of Engineering, Tokyo Denki University

Bibliographic Information

Other Title
  • 振動波形がMR elastography に与える影響
  • シンドウ ハケイ ガ MR elastography ニ アタエル エイキョウ

Search this article

Abstract

<p>The purpose of this study was to investigate an influence of vibration waveform on magnetic resonance elastography (MRE). MRE is an innovative imaging technique for the non-invasive quantification of the elasticity of soft tissues through the direct visualization of propagating shear waves in vivo using a special phase-contrast magnetic resonance imaging sequence. Since the elasticity of soft tissue calculates from the wavelength of propagating shear waves, it is necessary to propagate sine-wave-shape shear wave at the target soft tissue. However, due to the various factors; i.e. overload of vibration generator, poor contact between imaging object and vibration pad, etc.; it may be difficult to generate a simple sine wave. This work was focused on change vibration waveforms; i.e. square wave, triangle wave, saw-tooth wave; which is induced by the various factors. Phantom experimental results demonstrated that when square and saw-tooth waveforms of 25 Hz vibration frequency, into the phantom, the waveform of propagating wave was not similar to sine waveform. It may influence on the MRE that in case of the waveforms has low frequency and square or saw-tooth like waveforms.</p>

Journal

References(5)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top