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The Capital Region of Denmark - a part of Copenhagen University Hospital
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Reconstruction strategy for echo planar spectroscopy and its application to partially undersampled imaging

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  5. Improved calculation of the equilibrium magnetization of arterial blood in arterial spin labeling

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  1. Brain Changes Induced by Electroconvulsive Therapy Are Broadly Distributed

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  2. Coil profile estimation strategies for parallel imaging with hyperpolarized 13 C MRI

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  3. Inductive measurement and encoding of k-space trajectories in MR raw data

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  4. Invited talk: MR safety: Regulatory aspects

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The most commonly encountered form of echo planar spectroscopy involves oscillating gradients in one spatial dimension during readout. Data are consequently not sampled on a Cartesian grid. A fast gridding algorithm applicable to this particular situation is presented. The method is optimal, i.e., it performs as well as the full discrete Fourier transform for band limited signals while allowing for use of the fast Fourier transform. The method is demonstrated for reconstruction of data that are partially undersampled in the time domain. The advantages of undersampling are lower hardware requirements or fewer interleaves per acquisition. The method is of particular interest when large bandwidths are needed (e.g., for high field scanning) and for scanners with limited gradient performance. The unavoidable artifacts resulting from undersampling are demonstrated to be acceptable for spectroscopy with long echo times.
Original languageEnglish
JournalMagnetic Resonance in Medicine
Volume44
Issue number3
Pages (from-to)412-417
Number of pages6
ISSN0740-3194
DOIs
Publication statusPublished - 2000

    Research areas

  • Algorithms, Artifacts, Aspartic Acid, Brain, Brain Chemistry, Echo-Planar Imaging, Fourier Analysis, Humans, Image Processing, Computer-Assisted, Nerve Fibers, Myelinated, Phantoms, Imaging, Signal Processing, Computer-Assisted, Water

ID: 32511644