Figure 5
Three-dimensional renderings derived from a subset of the reconstructed volume which spans the thickness of the keel (upper and lower borders in Fig. 4). A and B correspond to the rows of channels described in Fig. 4. The upper-left rendering shows lower-absorbing voxels with darker pixels, and the edges of the parallelepiped are 49, 120 and 365 µm in length. The rendering at the lower right shows only the lowest-absorption voxels (dark gray pixels) with black indicating shadows; all voxels more absorbing than the channels are rendered transparent. The double-headed arrows point to the same row of channels in the other rendering. Note that the viewing perspective changes between the renderings; this is necessary to allow the separation between channels of one row to be seen clearly due to the fact that the channels have an elliptical cross section. |