Fig. 3From: The effects of volume of interest delineation on MRI-based radiomics analysis: evaluation with two disease groupsHeatmap for the inter-observer analysis of the segmentation. 30 cases with segmentation by two radiologists were randomly selected from each dataset. For each selected region of interest (ROI), the smallest rectangle that best fits the tumor region was used to calculate margin distance of two kinds of manual segmentation in four directions (up, down, left, and right), resulting in multiple calculated values (number of selected ROIs × 4) for analysis together. Colors in the heatmap indicated that margin differences of ROIs were concentrated between 0 and 8 pixels for all datasetsBack to article page