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Spraggins TA. Simulation of spatial and contrast distortions in keyhole imaging. Magn Reson Med. 1994;31(3):320-2doi: 10.1002/mrm.1910310312.
Spraggins, T. A. (1994). Simulation of spatial and contrast distortions in keyhole imaging. Magnetic resonance in medicine, 31(3), 320-2. https://doi.org/10.1002/mrm.1910310312
Spraggins, T A. "Simulation of spatial and contrast distortions in keyhole imaging." Magnetic resonance in medicine vol. 31,3 (1994): 320-2. doi: https://doi.org/10.1002/mrm.1910310312
Spraggins TA. Simulation of spatial and contrast distortions in keyhole imaging. Magn Reson Med. 1994 Mar;31(3):320-2. doi: 10.1002/mrm.1910310312. PMID: 8057804.
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Magn Reson Med. 1994 Mar;31(3):320-2. doi: 10.1002/mrm.1910310312.

Simulation of spatial and contrast distortions in keyhole imaging.

Magnetic resonance in medicine

T A Spraggins

Affiliations

  1. Department of Radiology, University of Virginia, Charlottesville 22908.

PMID: 8057804 DOI: 10.1002/mrm.1910310312

Abstract

Keyhole imaging is a scheme introduced to improve temporal resolution in dynamic contrast-enhanced MRI by a factor of four or more. A "full" acquisition before contrast administration is followed by truncated acquisitions sensitive primarily to changes in image contrast. Simulations of the point-spread functions that obtain, and their effect on contrast and spatial resolution, reveal significant degradation only for the smallest objects. Our simulations also address the feasibility of three-dimensional keyhold imaging, and demonstrate a potential 16-fold increase in temporal resolution. This suggests roles for keyhole imaging in conventional (nondynamic) precontrast and postcontrast studies and other applications.

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