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Proceedings Paper

Multiphase 3D MR tagging method based on TrueFISP sequence
Author(s): Shin-ichi Urayama; Leon Axel; Naoaki Yamada; Jun Okamoto; Hiroshi Watabe; Hidehiro Iida
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Paper Abstract

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 postprocessing 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.

Paper Details

Date Published: 24 April 2002
PDF: 9 pages
Proc. SPIE 4683, Medical Imaging 2002: Physiology and Function from Multidimensional Images, (24 April 2002); doi: 10.1117/12.463575
Show Author Affiliations
Shin-ichi Urayama, Research Institute of National Cardiovascular Ctr. (Japan)
Leon Axel, New York Univ. School of Medicine (United States)
Naoaki Yamada, Hospital of National Cardiovascular Ctr. Hospital (Japan)
Jun Okamoto, Siemens-Asahi Medical Technologies Ltd. (Japan)
Hiroshi Watabe, Research Institute of National Cardiovascular Ctr. (Japan)
Hidehiro Iida, Research Institute of National Cardiovascular Ctr. (Japan)


Published in SPIE Proceedings Vol. 4683:
Medical Imaging 2002: Physiology and Function from Multidimensional Images
Anne V. Clough; Chin-Tu Chen, Editor(s)

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