PMID: 9436945Jan 22, 1998Paper

Estimating spatial resolution of in vivo MR images using spatial modulation of magnetization

Magnetic Resonance Imaging
S C Wayte, T W Redpath

Abstract

Spatial Modulation of Magnetization is shown to provide a means of estimating perceived spatial resolution directly in vivo. On the first magnetic resonance system tested, resolution in conventional spin echo images was found to be stability limited in the phase encoding direction and voxel limited (via the Nyquist sampling theorem) in the frequency encoding direction both in vitro and in vivo. As the voxel size approaches half the stripe separation, fringes of resolved and unresolved stripes are formed across the image. This phenomenon is explained and described mathematically. On a second magnetic resonance scanner, resolution in the phase encoding direction of fast spin echo images with centrically ordered phase encoding is shown to be voxel limited in substances with long T2, with poorer resolution in substances with short T2. Resolution in fast spin echo images with linearly ordered phase encoding was shown to be voxel limited in the phase encoding direction.

References

Nov 1, 1992·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·R T Constable, J C Gore
Dec 1, 1992·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·E R McVeigh, E Atalar
Jan 1, 1991·Magnetic Resonance Imaging·M S Cohen, R M Weisskoff
Mar 1, 1985·Medical Physics·M L Wood, R M Henkelman
Jan 1, 1993·Magnetic Resonance Imaging·R A Lerski, J D de Certaines

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Citations

Jul 31, 2007·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Wen-Tung WangCraig H Meyer
Oct 3, 2012·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Lucian RoibanOvidiu Ersen

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