Phantoms Cadaveric

To test the algorithm, both an artificial and cadaverous phantom were created. Each phantom was scanned using a multirow detector CT (GE Light-speed QXl, GE Medical Systems). A collimation of 2.5 mm and ahigh quality pitch were selected. Scans were reconstructed using the manufacturer s stan-... 

In the case of cadaverous phantoms, a total of 13 artificial polyps were created using fat tissues. Figure 18.9a exhibits the surface-rendered 3D reconstruction of the segmented colon, and Figure 18.9b presents the same binary object with its central path as a transparent 3D model. In Figure 18.10 the appearance of the created polyps on axial and virtual endoscopic views can be seen. 

Fig. 18.9a,b. The cadaverous phantom, a Surface-rendered image of the segmented colon, b Transparent 3D model showing the central path obtained by skeletonization... 

Fig. 18.12. Virtual dissection of the cadaverous colon phantom using the 2D flattening approach...

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