Spectroscopic Imaging of Circular Voxels with a Two-Dimensional Fourier-Series Window Technique

Kristy Hendrich, Xiaoping Hu, Ravi S. Menon, Hellmut Merkle, Paul Camarata, Roberto Heros, Kâmil Uğurbil

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Spatial localization with the spectroscopic imaging technique is normally implemented with the Fourier-transform approach, yielding rectangular voxels, with potentially significant cross-voxel contamination. Multidimensional Fourier-series window (FSW) is an alternate approach that generates single voxels of predetermined shape, with minimal out-of-voxel contamination. The spatial location of the voxel is shifted by means of postacquisition processing. A two-dimensional circular voxel is introduced, which for many in vivo applications is a good match of the region of interest. Phantom images illustrate the spatial distribution of signal intensity within the circular FSW voxels. Phantom spectroscopic studies show excellent spatial localization, with no detectable out-of-voxel contamination. The circular FSW voxel approach is implemented in human and animal model studies, demonstrating the technique′s utility. This arbitrary shape approach can be extended to three dimensions, defining, for example, cylinders, spheres, or ellipsoids.

Original languageEnglish (US)
Pages (from-to)225-232
Number of pages8
JournalJournal of Magnetic Resonance, Series B
Volume105
Issue number3
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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