Table 4.
The error percentage (%) of two edges maps produced by Canny edge detection on original CBCT image and warped CT image by various similarity measures: none (meaning original CT image), SSD + MI, MI only, CC and RC. Numbers in bold are the best values for each case.
| Datasets | None | SSD + MI | MI | CC | RC |
|---|---|---|---|---|---|
| Head-and-neck (A) | 2.93 | 1.93 | 2.19 | 2.14 | 2.26 |
| Head-and-neck (B) | 2.29 | 2.07 | 2.25 | 2.12 | 2.08 |
| Head-and-neck (C) | 2.39 | 1.52 | 1.81 | 1.77 | 1.68 |
| Prostate (A) | 1.21 | 0.47 | 0.50 | 0.54 | 1.06 |
| Prostate (B) | 1.89 | 1.18 | 1.50 | 1.83 | 1.74 |
| Prostate (C) | 3.27 | 2.37 | 2.45 | 2.79 | 2.69 |