Multi-phase 3D MR tagging method based on TrueFISP sequence

Shin Ichi Urayama, Leon Axel, Naoaki Yamada, Jun Okamoto, Hiroshi Watabe, Hidehiro Iida

研究成果: Article査読

抄録

A rapid multi-phase 3D tagging method based on TrueFISP sequence and its postprocessing algorithm are proposed for 3D regional myocardial motion analysis. SPAMM (SPAtial Modulation of Magnetization) plane tags perpendicular to the read-out direction were imposed for easy tagged-image analysis. To acquire images covering a whole heart within a single breath hold (25 heartbeats), an ellipsoidal cylinder region in the 3D k-space was filled in a 3D centric reordering manner. The post-processing algorithm was based on a Hessian matrix. Since the eigenvalues of the Hessian matrix defined at each voxel represent the curvature of the 3D image along the corresponding eigenvectors, a group of voxels, at which the largest eigenvalue was positive, much greater than the others and for when the corresponding eigenvector pointed almost along the read-out direction, were selected as a tag-plane. On the resulting images, clear tag contrast can be observed in spite of the small number of k-space lines. Almost all tag planes can be extracted with the algorithm. Those results show our methods are potentially clinically useful.

本文言語English
ページ(範囲)130-138
ページ数9
ジャーナルProceedings of SPIE - The International Society for Optical Engineering
4683
DOI
出版ステータスPublished - 2002 1 1
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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