When a three-dimensional object was generated from the Visible Human pelvic bones, we were surprised to find the image was both too complex yet lacked sufficient detail. The complexity is a consequence of the technique used to reconstruct the 3D image from the sections. Because the algorithm used to generate the images preserves the surface texture and color of the segmented object, the surface of the pelvic bones was disfigured by portions of muscle tissue that were also segmented because of their proximity to the bony surface. This is one area where our visualization method of the the Visible Human data may not provide an advantage over other means of illustrating the bony pelvis, unless we choose to use pseudocoloring to replace the texturing with the original color of the tissue. Absence of detail is a consequence of the lack of shadows in the three-dimensional images of the Visible Human.
For comparative purposes we generated a movie of
a model of the pelvic bones [Figure 2] by digital
photography. This movie was also used as a framework for illustrations
showing the relationship of the pelvic diaphragm to the bony pelvis.