Intensity correction by subtraction for phased-array MRA images.
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.
Lee
J N
JN
Department of Radiology, University of Utah School of Medicine, Salt Lake City, Utah 84132, USA.
Roberts
J A
JA
Parker
D L
DL
Tsuruda
J S
JS
D002531:Cerebellum / Q000098:blood supply; D002536:Cerebral Arteries / Q000033:anatomy & histology; D005069:Evaluation Studies as Topic; D007089:Image Enhancement / Q000379:methods*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D012680:Sensitivity and Specificity; D013382:Subtraction Technique