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A CT image slice of the colon with enhanced colonic materials (a). The white vertical line indicates a sample path for the profile of picture (c). A threshold of 200HU (Hounsfield unit) generates a segmentation of picture (b). Picture (d) shows the corresponding density profile from (b) along the vertical line in (a). The interface layer is a mixture of air and tagged colonic materials. The enhanced mucosa layer is a mixture of colon tissues and tagged materials.
