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Methods

     Individual bones of the Male Visible Human were outlined in sections of the pelvis (between slices 1731 and 1950). Masks were created  using Adobe Photoshop 3.0 on a Silicon Graphics system. Masks were created  for the individual bones so that three-dimensional models of the individual components of the bony pelvis could be generated.  Similarly, all muscles present in pelvic sections (1731-1965) were outlined for segmentation.  Lastly, the male bladder, urethra, prostate and ejaculatory ducts were segmented.  The segmented 2D images were used by  a surface modeling tool [5] to extract color 3D models of the anatomical structures. The visualization tools not only preserve the detailed  geometry of the models, but also texture them in the true tissue color. The resulting visualizations are of near-photographic quality.

    Our initial three-dimensional images show all the bones or muscles grouped together or in separation. We can link the 3D models by merging their respective 2D segmentations before the final 3D reconstruction takes place. Similarly we have generated three-dimensional models of the bladder, prostate and urethra. These can be viewed in separation or together.  Since we have segmented  all the individual bones and muscles of the pelvis, we can generate three-dimensional models of the individual bones and muscles in the future.  Ultimately, three-dimensional visualizations that allow disarticulation of the individual bony components will be generated. Individual muscles can then be added to the bones to build the pelvic anatomy.

    We have generated multimedia tutorials to illustrate the relationships of the bones and muscles of the pelvis and serve as prototypes for the illustrations generated from the fully segmented Visible Human data.  Prototypes combined QuickTime movies and  other 3D interactive models  of the bony pelvis with illustrations of the Pelvic/Perineal structures.  The illustrations were generated in Adobe Photoshop 5.0 and overlaid on the 3D images of the pelvic bone.  Layers were created and superimposed to recapitulate anatomical dissection.  When the individual muscles and other structures are separated from the Visible Human Data we have segmented, they will be organized in a similar manner to allow viewing from either the  "inside-out" or "outside-in" as demonstrated in our multimedia interactive.
  


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