TABLE IV. Fitting Results for the Subject-Specific MRI Mesh.
Summary of the subject-specific MRI fitting results obtained by fitting piece-wise bi- and tricubic Hermite surfaces to digitized MRI slices of a particular female subject. The RMS errors are calculated as the difference between digitized data points and their orthogonal projections onto the fitted surfaces.
| Component | No. Data Pts |
No. Nodes |
No. Elem. |
RMS Error (mm) |
|---|---|---|---|---|
| LAPREXSPH | 4335 | 314 | 128 | 1.03 |
| LA | 2830 | 169 | 58 | – |
| PR | 875 | 120 | 39 | – |
| EAS | 630 | 78 | 28 | – |
| LURECINSPH | 1831 | 114 | 54 | 0.78 |
| Lumen | 691 | * | * | – |
| Rectum | 981 | 84 | 36 | – |
| IAS | 159 | 42 | 18 | – |
| Coccyx | 217 | 38 | 42 | 0.45 |
| TP | 157 | 28 | 32 | 0.94 |
| PB | 107 | 24 | 18 | 0.48 |
| Bladder | 1477 | 46 | 45 | 0.68 |
| Uterus | 375 | 31 | 30 | 0.52 |
| Vagina | 1250 | 64 | 56 | 0.84 |
| Bulbospongiosus | 388 | 74 | 23 | 0.66 |
| Obturator Internus | 3570 | 288 | 132 | 1.03 |
*
In order to create volume meshes for the rectum and internal anal sphincter muscles, the lumen data was used to form the inner surfaces, therefore, no nodes or elements are associated with the lumen surface.