Table 1.
Registration validation by calculating distances between landmarks in the registered images and their corresponding homologous landmarks in the target image. Manual landmark identification errors were assessed by checking how landmarks marked in two different views agreed with each other. Avg_16, Dev_16 and Max_16 are statistics (average, standard deviation and maximum) over the 16 CT scans tested.
| Distances between homologous landmarks (mm) | Manual landmark identification errors (mm) | |||
|---|---|---|---|---|
| Before Registration | After registration | |||
| All 4 landmarks | Avg_16
Dev_16 Max_16 |
9.34
4.89 19.60 |
2.56
1.32 4.98 |
1.70
1.36 6.56 |
| Fovea capitis | Avg_16
Dev_16 Max_16 |
12.76
4.81 19.60 |
2.56
1.37 4.11 |
1.14
1.14 3.28 |
| Trochanteric Fossa | Avg_16
Dev_16 Max_16 |
8.41
4.44 19.59 |
2.78
1.13 4.22 |
1.99
1.33 3.98 |
| Quadrate Tubercle | Avg_16
Dev_16 Max_16 |
7.95
4.98 17.31 |
2.69
1.50 4.98 |
1.93
1.35 5.57 |
| Internal calcar Septum | Avg_16
Dev_16 Max_16 |
8.26
4.03 14.80 |
2.20
1.32 4.89 |
1.75
1.54 6.56 |