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Figure 4. 3D reconstruction with surface displays.(a) Structures above corresponding thresholds in the positive and negative sequences are separately visualized. In order not to obscure the smaller structures (in grey), the positive sequence is placed closer to the readers, so the bladder is placed in front of the lower abdomen. The threshold in the negative sequence is set to intermediate low so that the separations of the three spongy structures are displayed as solid while their inner regions as (artificially) hollow. (b) The structures from both positive and negative sequences are fused together to reveal the relationship between the cuff and the urethra; in this case, the cuff is fully sealed (also see movies on our website for a better 3D perception).
