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Indicative results of the segmentation in gray scale. Black color (red, green, blue [RGB] [0, 0, 0]) corresponds to anything outside the inner surface of the skull that defines the cranial cavity. This implies that black color can represent cranial bones, air, etc. White color (RGB [255, 255, 255]) corresponds to white matter, RGB (128, 128, 128) corresponds to gray matter, and RGB (160, 160, 160) corresponds to cerebrospinal fluid.
