Table 3.
The average distance errors (in mm) for the different cases of known simulated motion in the NCAT phantom for the metrics investigated. XTwo, YTwo, ZTwo indicates two motion groups were simulated with motion in X, Y and Z direction respectively. XThree, YThree and ZThree are simulated similarly with three motion groups. In both cases the full 6-DOF motion model was optimized. The columns Group 1 and Group 2 refer to AvDistErr in the transformations estimated between the second and third motion groups with respect to the reference Group 0.
| MSD | NCC | PI | NMI | MI | |
|---|---|---|---|---|---|
| XTwo Translation | 3.69 | 3.78 | 2.05 | 2.94 | 5.51 |
| XTwo Rotation | 9.29 | 10.23 | 7.61 | 4.25 | 8.22 |
| YTwo Translation | 4.62 | 3.64 | 1.63 | 2.43 | 5.60 |
| YTwo Rotation | 7.52 | 5.42 | 8.83 | 6.21 | 5.14 |
| ZTwo Translation | 2.99 | 3.46 | 2.90 | 2.85 | 3.18 |
| ZTwo Rotation | 8.27 | 8.22 | 5.51 | 6.54 | 6.54 |
| Complex | 4.44 | 6.96 | 6.16 | 6.91 | 3.78 |
| Average | 5.83 | 5.96 | 4.96 | 4.59 | 5.42 |
| MSD | NCC | PI | NMI | MI | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Group 1 |
Group 2 |
Group 1 |
Group 2 |
Group 1 |
Group 2 |
Group 1 |
Group 2 |
Group 1 |
Group 2 |
|
| XThree Translation | 3.78 | 4.25 | 4.48 | 3.88 | 1.82 | 4.58 | 1.87 | 4.90 | 4.11 | 6.68 |
| XThree Rotation | 10.46 | 12.61 | 11.96 | 15.60 | 3.22 | 3.88 | 8.13 | 9.34 | 9.15 | 11.96 |
| YThree Translation | 3.88 | 8.50 | 3.74 | 6.72 | 1.26 | 3.64 | 2.62 | 3.83 | 5.51 | 5.70 |
| YThree Rotation | 7.01 | 9.11 | 4.67 | 9.81 | 1.68 | 4.44 | 2.10 | 6.21 | 4.20 | 4.76 |
| ZThree Translation | 4.20 | 8.55 | 3.78 | 8.22 | 4.30 | 7.47 | 3.97 | 4.53 | 2.52 | 4.76 |
| ZThree Rotation | 11.68 | 17.00 | 10.74 | 15.41 | 6.63 | 10.37 | 7.01 | 11.68 | 5.60 | 11.21 |
| Average | 6.83 | 10.00 | 6.56 | 9.94 | 3.15 | 5.73 | 4.28 | 6.75 | 5.18 | 7.51 |