Figure 3
From: Comprehensive Investigation on Controlling for CT Imaging Variabilities in Radiomics Studies

Absolute value of the Pearson correlation rho for the correlation between feature value and image thickness for each region of interest (ROI). Each ROI is a different shape. Each category of feature is a different color. The correlation varies between and within features depending on the ROI. COM: gray level co-occurrence matrix, GLCM: gray level co-occurrence (used when there are features with the same name in different categories to differentiate them), GLRLM: gray level run length matrix, NGTDM: neighborhood gray tone difference matrix, beads: acrylic beads, worms: polyvinyl chloride pieces.