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Intensity correction by subtraction for phased-array MRA images
J N Lee1, J A Roberts, D L Parker
1Department of Radiology, University of Utah School of Medicine, Salt Lake City, Utah 84132, USA.
Abstract:
A method of intensity correction is described that is particularly useful for magnetic resonance angiography images acquired with phased-array coils. In this method a low-pass filtered version of the image is subtracted from the original image to remove signal variations due to the phased-array coil. This avoids the noise amplification caused by division correction and enhances the signal-to-noise ratio of small arteries in maximum intensity projections. J. Magn. Reson. Imaging 2000;12:501-504.

