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Fig. 3 | Journal of Cheminformatics

Fig. 3

From: rMSIcleanup: an open-source tool for matrix-related peak annotation in mass spectrometry imaging and its application to silver-assisted laser desorption/ionization

Fig. 3

Exploratory analysis with PCA before and after removing matrix-related peaks. Red, green and blue are used to represent the spatial distribution of PC1, PC2 and PC3, respectively. The last column uses the Red Green Blue colour model (RGB) to represent the first three principal components in a single image. The annotation and removal of the matrix-related peaks lead to a generalized improvement in the contrast of morphological structures in all principal components. a Pancreas tissue from Dataset 2. b Brain tissue from Dataset 11 [18]

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