Table 1.
Summary of Results of Nonrigid Registration between Preprocedural MRI and Intraprocedural CT Images using B-Spline and GPU-accelerated Registration Techniques
| Mean ± SD | Range | p-value | ||
|---|---|---|---|---|
| DSC (%) | GPU | 88.30 ± 3.74 | 80.49 – 93.11 | 0.41 |
| B-Spline | 89.32 ± 4.90 | 79.70 – 94.46 | ||
| 95% HD (mm) | GPU | 13.14 ± 5.19 | 6.43 – 24.54 | 0.15 |
| B-Spline | 11.44 ± 6.32 | 5.43 – 23.04 | ||
| Time - Rigid Reg. (s) | GPU | 8.58 ± 6.31 | 4.36 – 29.28 | < 0.002 |
| B-Spline | 20.53 ± 7.01 | 14.56 – 40.08 | ||
| Time - Nonrigid Reg. (s) | GPU | 76.90 ± 10.75 | 61.5 – 91.43 | < 0.00002 |
| B-Spline | 42.48 ± 11.39 | 19.38 – 68.57 | ||
| Time - Resampling (s) | GPU | 2.07 ± 0.47 | 1 – 3 | < 0.0000000001 |
| B-Spline | 27.72 ± 5.02 | 19.87 – 40.71 | ||
| Time – Total Computation (s) |
GPU | 87.55 ± 14.26 | 69.10 – 118.25 | 0.71 |
| B-Spline | 90.72 ± 21.81 | 58.42 – 149.36 | ||
| Voxel Throughput (voxels/s) |
GPU | 195024.67 ± 141785.32 | 104192.50 – 614978.60 | < 0.0004 |
| B-Spline | 18050.36 ± 6324.58 | 12001.98 – 32628.07 | ||
| Time – Manual ROI Contouring |
GPU | N/A | N/A | N/A |
| B-spline | 466 ± 104 | 300–701 | ||
| Time –Total Processing | GPU | 87. 55 ± 14.26 | 69.10 – 118.25 | <0.000000002 |
| B-spline | 557.08 ± 116.47 | 375.83 – 850.36 | ||