Table 3.
Summary of nMI re-registration results. NMI-corrected CPPD (using Tref) was significantly lower than with fiducial-based registration (p⪡0.001). Shown also are the registration execution time, the number of iUS pixels, and pMR voxels used for nMI evaluation, the number of iUS tumor boundary points segmented from iUS, and the empirical measure of tumor feature prominence Ψ.
| Patient | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Initial CPPD (mm) | 3.0±1.6 | 1.4±1.0 | 2.3±1.3 | 4.9±1.6 | 1.8±1.2 | 1.4±0.73 |
| nMI-corrected CPPD (mm) | 1.0±0.7 | 0.90±0.8 | 1.3±0.95 | 1.3±1.2 | 0.85±0.61 | 0.70±0.65 |
| Execution time (sec) | 73 | 54 | 45 | 65 | 29 | 91 |
| Number iUS pixels used1 | 453 | 344 | 266 | 372 | 165 | 1133 |
| Number pMR voxels intersected | 19 928 | 20 632 | 9632 | 17 744 | 7368 | 32 760 |
| Number iUS boundary points segmented | 2122 | 2329 | 642 | 650 | 1535 | 691 |
| Ψ | 0.33 | 5.72 | 0.041 | 0.054 | 0.88 | 0.73 |
a
The number of iUS pixels in thousands.
b
Exceptionally large due to cyst boundaries used.