Locally focused MRI

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Y CaoL Yao

Abstract

Conventional magnetic resonance images are reconstructed by Fourier transformation and have uniform spatial resolution across the entire field of view (FOV). This paper describes a way of creating MR images that have higher spatial resolution in some areas than in others. High resolution imaging can be confined to just those areas where it is necessary to resolve strong edges without truncation artifact. Such locally focused images can be acquired in less scan time than that required to image the entire FOV with uniformly high resolution. Images are reconstructed from a subset of the usual phase-encoded signals required to create a uniformly well-resolved image. The measured signals are usually nonuniformly scattered in k-space. Functional and interventional imaging may benefit from this technique, which makes it possible to acquire a rapid series of dynamical images that have high resolution in areas of expected change and lower resolution elsewhere. Spectroscopic images may be improved by using high resolution in the neighborhood of sharp edges (e.g., scalp lipids) that might otherwise cause truncation artifacts.

References

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Citations

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
Mar 22, 2000·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·C M Tsai, D G Nishimura
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
Dec 1, 1996·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·L YaoD N Levin
May 15, 1998·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·D C NollF E Boada
May 15, 1998·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G Z YangD N Firmin
Apr 6, 2005·Magnetic Resonance Imaging·Kate McLeish, Pablo Irarrazaval
Apr 11, 2001·Magnetic Resonance Imaging·Y M Ro
Jun 18, 1999·Magnetic Resonance Imaging·V Y KupermanM T Alley
Feb 3, 2004·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Marijn E BrummerW Thomas Dixon
Feb 13, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Gage RedlerHoward J Halpern
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Jul 26, 2000·IEEE Transactions on Medical Imaging·H Sedarat, D G Nishimura
Sep 4, 2015·Medical Physics·Lior WeizmanDafna Ben Bashat
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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