Blog
About

  • Record: found
  • Abstract: found
  • Article: not found

Head motion detection using FID navigators.

Read this article at

ScienceOpenPublisherPubMed
Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Abstract

      This work explores a concept for motion detection in brain MR examinations using high channel-count RF coil arrays. It applies ultrashort (<100 μsec) free induction decay signals, making use of the knowledge that motion induces variations in these signals when compared to a reference free induction decay signal. As a proof-of-concept, the method was implemented in a standard structural MRI sequence. The stability of the free induction decay-signal was verified in phantom experiments. Human experiments demonstrated that the observed variations in the navigator data provide a sensitive measure for detection of relevant and common subject motion patterns. The proposed methodology provides a means to monitor subject motion throughout a MRI scan while causing little or no impact on the sequence timing and image contrast. It could hence complement available motion detection and correction methods, thus further reducing motion sensitivity in MR applications.

      Related collections

      Author and article information

      Affiliations
      [1 ] Laboratory for Functional and Metabolic Imaging, Ecole Polytechnique Fédérale de Lausanne, Switzerland. tobias.kober@epfl.ch
      Journal
      Magn Reson Med
      Magnetic resonance in medicine
      Wiley
      1522-2594
      0740-3194
      Jul 2011
      : 66
      : 1
      21337424
      10.1002/mrm.22797

      Comments

      Comment on this article