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Three-Dimensional Magnetization-Prepared Imaging Using a Concentric Cylinders Trajectory

Title
Three-Dimensional Magnetization-Prepared Imaging Using a Concentric Cylinders Trajectory
Authors
Kwon, Kie TaeWu, Holden H.Shin, TaehoonCukur, TolgaLustig, MichaelNishimura, Dwight G.
Ewha Authors
신태훈
Issue Date
2014
Journal Title
MAGNETIC RESONANCE IN MEDICINE
ISSN
0740-3194JCR Link

1522-2594JCR Link
Citation
MAGNETIC RESONANCE IN MEDICINE vol. 71, no. 5, pp. 1700 - 1710
Keywords
non-Cartesian trajectories3D concentric cylindersmagnetization-prepared imaging
Publisher
WILEY-BLACKWELL
Indexed
SCI; SCIE; SCOPUS WOS
Document Type
Article
Abstract
PurposeTo develop new magnetization-prepared imaging schemes based on a three-dimensional (3D) concentric cylinders trajectory. MethodsThe 3D concentric cylinders trajectory, which is robust to off-resonance effects and timing delays while requiring fewer excitations than a comparable 3D Cartesian (3DFT) sequence, is used as the readout for magnetization-prepared sequences exploiting its inherently centric-ordered structure. Two applications: (i) T-1-weighted brain imaging with an inversion-recovery-prepared radiofrequency-spoiled gradient-echo (IR-SPGR) sequence, (ii) non-contrast-enhanced (NCE) peripheral angiography with a magnetization-prepared balanced steady-state free precession (bSSFP) sequence are presented to demonstrate the effectiveness of the proposed method. For peripheral angiography, the scan efficiency is further improved by interleaving different preparations at different rates and by carefully designing the sampling geometry for an efficient parallel imaging method. ResultsIn vivo brain scans with an IR-SPGR sequence and lower extremity scans with a magnetization-prepared bSSFP sequence for NCE peripheral angiography both demonstrate that the proposed sequences with concentric cylinders effectively capture the transient magnetization-prepared contrast with faster scan times than a corresponding 3DFT sequence. The application of peripheral angiography also shows the feasibility of the proposed interleaving schemes and parallel imaging method. ConclusionThe 3D concentric cylinders trajectory is a robust and efficient readout that is well-suited for magnetization-prepared imaging. Magn Reson Med 71:1700-1710, 2014. (c) 2013 Wiley Periodicals, Inc.
DOI
10.1002/mrm.24823
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엘텍공과대학 > 휴먼기계바이오공학부 > Journal papers
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