Figure 4From: ImageParser: a tool for finite element generation from three-dimensional medical images The Grayscale Histogram of ROI. Horizontal axis denotes a grayscale (G), and vertical axis a number of voxels. G = 0 is the background color of black; G = 255 the color of white. From the grayscale distribution corresponding to the tissues in Figure 3, we can define the grayscale range for fat, parenchyma, and tumor tissues.Back to article page