Table 3.
Registration of 27 US images of younger dataset with MR template. Average volume overlaps of four manually segmented structures and their standard deviations after registration of the source image (third column) to the US images. We also present p-value showing statistical significance when compared to the proposed method. The best performance is highlighted in bold.
| Registration | Similarity | Source | CP | VC | CH | CSP | Average |
|---|---|---|---|---|---|---|---|
| No alignment | 0.18 ± 0.14 | 0.10 ± 0.15 | 0.09 ± 0.13 | 0.09 ± 0.14 | 0.12 ± 0.14 | ||
| Gradient descent | NMI | MRI | 0.28 ± 0.19 | 0.18 ± 0.18 | 0.27 ± 0.19 | 0.22 ± 0.17 | 0.24 ± 0.18 |
| p-value | 1 × 10−8 | 2 × 10−9 | 2 × 10−7 | 3 × 10−6 | 6 × 10−12 | ||
| Gradient descent | NCC | Pseudo US | 0.45 ± 0.16 | 0.34 ± 0.19 | 0.31 ± 0.20 | 0.40 ± 0.17 | 0.37 ± 0.18 |
| p-value | 2 × 10−4 | 0.022 | 1 × 10−6 | 0.21 | 7 × 10−5 | ||
| Gradient descent | LNCC | Pseudo US | 0.42 ± 0.25 | 0.35 ± 0.26 | 0.45 ± 0.25 | 0.32 ± 0.18 | 0.38 ± 0.23 |
| p-value | 3 × 10−4 | 1 × 10−3 | 0.021 | 4 × 10−3 | 5 × 10−4 | ||
| Block-matching | CR | MRI | 0.54 ± 0.13 | 0.43 ± 0.17 | 0.46 ± 0.15 | 0.39 ± 0.13 | 0.46 ± 0.14 |
| p-value | 0.048 | 0.30 | 3 × 10−4 | 6 × 10−3 | 5 × 10−3 | ||
| Block-matching | CR | Pseudo US | 0.58 ± 0.11 | 0.42 ± 0.17 | 0.54 ± 0.16 | 0.39 ± 0.11 | 0.48 ± 0.14 |
| p-value | 0.92 | 0.043 | 0.31 | 0.010 | 0.13 | ||
| Block-matching | NCC | Pseudo US | 0.58 ± 0.10 | 0.46 ± 0.15 | 0.57 ± 0.09 | 0.43 ± 0.10 | 0.51 ± 0.11 |