Adaptive anisotropic noise filtering for magnitude MR data

Jan Sijbers, Arnold J. den Dekker, Marleen Verhoye, Anne-Marie Van der Linden, Dirk Van Dyck, Kenneth M. Hanson
1999 Medical Imaging 1999: Image Processing  
Conventional noise filtering schemes applied to magnitude magnetic resonance (MR) images tacitly assume Gauss distributed noise. Magnitude MR data, however, are Rice distributed. Not incorporating this knowledge leads inevitably to biased results, in particular when applying such filters in regions with low signal-to-noise ratio. In this work, we show how the Rice data probability distribution can be incorporated so as to construct a noise filter that is far less biased.
doi:10.1117/12.348541 dblp:conf/miip/SijbersDVLD99 fatcat:5sd5swvmnbhjxbbvltoou2hamq