Table 4.
Registration of 27 US images of younger dataset with MR template. Average distance of barycentres (in mm) of the 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.
| Registration | Similarity | Source | CP | VC | CH | CSP | Average |
|---|---|---|---|---|---|---|---|
| No alignment | 6.50 ± 2.65 | 7.75 ± 3.43 | 7.15 ± 2.52 | 7.37 ± 2.75 | 7.19 ± 2.84 | ||
| Gradient descent | NMI | MRI | 5.66 ± 3.19 | 6.54 ± 3.85 | 5.68 ± 4.37 | 4.80 ± 2.46 | 5.67 ± 3.47 |
| p-value | 4 × 10−6 | 7 × 10−6 | 2 × 10−4 | 6 × 10−5 | 1 × 10−6 | ||
| Gradient descent | NCC | Pseudo US | 3.51 ± 2.06 | 3.68 ± 2.86 | 4.67 ± 2.87 | 3.20 ± 2.24 | 3.76 ± 2.51 |
| p-value | 6 × 10−3 | 0.041 | 3 × 10−5 | 0.32 | 1 × 10−3 | ||
| Gradient descent | LNCC | Pseudo US | 4.33 ± 2.95 | 4.69 ± 4.13 | 3.36 ± 3.41 | 3.87 ± 2.36 | 4.06 ± 3.21 |
| p-value | 5 × 10−4 | 4 × 10−3 | 0.033 | 0.011 | 2 × 10−3 | ||
| Block-matching | CR | MRI | 2.79 ± 1.57 | 2.74 ± 01.58 | 2.95 ± 1.91 | 3.54 ± 2.14 | 3.00 ± 1.80 |
| p-value | 0.077 | 0.28 | 3 × 10−3 | 5 × 10−3 | 0.02 | ||
| Block-matching | CR | Pseudo US | 2.45 ± 1.29 | 2.82 ± 1.71 | 2.19 ± 1.56 | 3.11 ± 1.58 | 2.64 ± 1.54 |
| p-value | 0.63 | 0.089 | 0.25 | 4 × 10−3 | 0.11 | ||
| Block-matching | NCC | Pseudo US | 2.38 ± 1.06 | 2.42 ± 1.30 | 1.87 ± 0.70 | 2.77 ± 1.40 | 2.36 ± 1.11 |