PMID: 8946349Dec 1, 1996Paper

2D locally focused MRI: applications to dynamic and spectroscopic imaging

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
L YaoD N Levin

Abstract

Conventional magnetic resonance images have uniform spatial resolution across the entire field of view. A method of creating MR images with user-specified spatial resolution along one dimension of the field of view was described recently by the authors. This paper presents the 2D generalization of this technique, which allows the user to specify arbitrary spatial resolution in arbitrary 2D regions. These images are reconstructed from signals that sparsely sample the k-space representation of the image. Therefore, locally focused images can be acquired in less time than that required by Fourier imaging with uniformaly high resolution. In this paper the authors show how to increase the temporal resolution of dynamic imaging (e.g., interventional imaging) by using high resolution in areas of expected change and lower resolution elsewhere. Alternatively, by matching the local spatial resolution to the expected edge content of the image, it is possible to avoid the localized truncation artifacts that mark Fourier images reconstructed from the same number of signals. For example, the authors show how proton spectroscopic images of the head may be improved by using high resolution in the neighborhood of scalp lipids that might otherwi...Continue Reading

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Citations

May 20, 1999·Journal of Magnetic Resonance Imaging : JMRI·V Y KupermanD N Levin
Feb 20, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G Z YangD N Firmin
Sep 1, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G Z YangD N Firmin
Mar 22, 2000·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·H SedaratD G Nishimura
Nov 1, 1996·Journal of Magnetic Resonance Imaging : JMRI·J L DuerkD H Wu
Dec 16, 1998·Journal of Magnetic Resonance Imaging : JMRI·V Y KupermanD N Levin
May 30, 2001·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·L P PanychR V Mulkern
Oct 9, 2001·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·J TsaoA G Webb
Sep 4, 1998·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·K Scheffler, J Hennig
Jun 18, 1999·Magnetic Resonance Imaging·V Y KupermanM T Alley
Jul 9, 2009·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Ajit Devaraj, James G Pipe
Jul 26, 2007·IEEE Transactions on Medical Imaging·Ildar KhalidovMichael Unser
Jan 1, 2009·IEEE Transactions on Medical Imaging·Wei Lin, Hee Kwon Song
May 23, 2002·IEEE Transactions on Medical Imaging·Zhihua Xu, Andrew K Chan
Jul 26, 2000·IEEE Transactions on Medical Imaging·H Sedarat, D G Nishimura
May 9, 2006·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yun GaoJing-Huei Lee
May 20, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·S K Nagle, D N Levin

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