Figure 16: Several slices of the region of interest containing a nodule that the (a) surface-fitting and (b) plane-cutting methods failed to properly segment. The nodule was located near the diaphragm; notice that there was a large change in the position of the wall in frames 9 to 11. The voxels included in the segmentation are indicated in white, while high-intensity nonnodule voxels are shown in gray.