Table 5.
Correction of 2D measurements using linear regression equations
| |
|
Perturbed pose (3 Deg) |
Perturbed pose (6 Deg) |
||
|---|---|---|---|---|---|
| Error (%) | Corrected error (%) | Error (%) | Corrected error (%) | ||
|
Sagittal Plane |
Tibia Part |
|
|
|
|
| |
TiAL |
2.17 |
-1.02 |
4.41 |
1.12 |
| |
TiSR |
3.17 |
-0.05 |
4.87 |
1.59 |
| |
APG |
3.51 |
-0.14 |
13.34 |
9.42 |
| |
APA |
2.69 |
2.69 |
8.40 |
8.40 |
| |
MTiTh |
2.91 |
-1.66 |
5.56 |
0.25 |
| |
MDA |
31.36 |
8.42 |
65.25 |
35.96 |
| |
MDV |
25.43 |
8.63 |
33.46 |
12.09 |
| |
Talus Part |
|
|
|
|
| |
TaAL |
-8.57 |
1.95 |
-5.92 |
0.58 |
| |
TaR |
7.08 |
1.10 |
8.35 |
1.84 |
|
Frontal Plane |
Tibia part |
|
|
|
|
| |
TiW |
4.97 |
-1.85 |
6.87 |
-0.23 |
| |
MalW |
2.37 |
0.54 |
3.54 |
1.66 |
| |
MLATi |
2.21 |
2.07 |
2.74 |
2.60 |
| |
Talus part |
|
|
|
|
| |
TaW |
-10.61 |
-8.78 |
-16.36 |
-14.07 |
| MLATa | 29.80 | 14.76 | 50.54 | 29.11 | |
*Error = 100% × (2D - 3D)/3D.
Mean residual errors of 2D measurements of the morphological parameters made on two sets of DRR images produced from 3D poses with random errors in the three individual rotational components for up to 3 degrees and 6 degrees, respectively, before and after corrections using the linear regression equations derived from data in the standard pose.