Table 2.
Characteristics of the motion traces generated for each subject case. The parameters are in reference to Eq. (1). The fitting parameter (n) was 2 for all cases in this table. The X and Y directions were always in phase (φX = 0). The RMS displacement from the origin is a metric used to describe the 3D magnitude of motion from the phantom origin location (where it was registered). With motion tracking turned off, δRMS for each case in Table 3 would be equal to this value.
| (mm) | (mm) | (mm) | RMS displacement from origin (mm) | (s) | φZ (%) | |
|---|---|---|---|---|---|---|
| Lung 1 | 16 | 10 | 6 | 6.9 | 5 | 20 |
| Lung 2 | 5 | 10 | 9 | 5.4 | 5 | −10 |
| Lung 3 | 7 | 14 | 13 | 7.4 | 5 | −20 |
| Lung 4 | 12 | 13 | 13 | 8.0 | 5 | 0 |
| Lung 5 | 10 | 6 | 2 | 5.6 | 5 | 0 |
| Liver 1 | 9 | 2 | 1 | 3.4 | 3 | −50 |
| Liver 2 | 11 | 14 | 5 | 6.8 | 4 | −60 |
| Liver 3 | 16 | 5 | 1 | 6.1 | 4 | 10 |
| Liver 4 | 18 | 16 | 6 | 9.4 | 3 | 0 |
| Pancreas 1 | 13 | 3 | 1 | 5.4 | 3 | 20 |
| Pancreas 2 | 14 | 11 | 5 | 6.8 | 5 | −50 |
| Pancreas 3 | 14 | 3 | 1 | 5.3 | 4 | −10 |
| Pancreas 4 | 10 | 6 | 6 | 5.1 | 4 | −20 |