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Radiology, Vol 156, 93-98, Copyright © 1985 by Radiological Society of North America

ARTICLES

Central nervous system high-resolution magnetic resonance imaging: effect of increasing spatial resolution on resolving power

WG Bradley Jr, KE Kortman and JV Crues

Resolving power is a useful measure of the magnetic resonance (MR) imager-determined ability to discriminate subtle disease. Optimizing the resolving power produces the best MR images. The resolving power improves with higher spatial resolution, signal-to-noise ratio, and object contrast. Resolving power degrades with increased patient motion, which can be associated with prolonged imaging times. High and low object contrast 0.35-T MR images of the central nervous system are compared at different levels of spatial resolution and signal-to-noise ratios. In systems that have a marginal signal-to-noise ratio, the resolving power can actually decrease when higher spatial resolution is used due to further lowering of signal-to-noise ratio and to increased motion resulting from longer imaging times. This decreases the conspicuity of small, low contrast lesions.


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M. Stehling, R Turner, and P Mansfield
Echo-planar imaging: magnetic resonance imaging in a fraction of a second
Science, October 4, 1991; 254(5028): 43 - 50.
[Abstract] [PDF]


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