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Abstract-A novel approach to create nosologic images of the brain using magnetic resonance spectroscopic imaging (MRSI) data in an unsupervised way is presented. Different tissue patterns are identified from the MRSI data using non-negative matrix factorization (NMF) and are then coded as different primary colors (i.e. red, green and blue) in an RGB image, so that mixed tissue regions are automatically visualized as mixtures of primary colors. The approach is useful in assisting gliomadoi:10.1109/tbme.2012.2228651 pmid:23192480 fatcat:w7cm7buk7jcyll5nyy4qvdnhri