Table 3.
Setup Discrepancies Between ExacTrac X-ray 6D and CBCT for the Patient Study. Left, for the Spinal Patients Group and Right for the Nonspinal Cases.
| Motions | Discrepancies ExacTrac X-ray versus kV-CBCT spinal | Discrepancies ExacTrac X-ray versus kV-CBCT nonspinal | ||||||
|---|---|---|---|---|---|---|---|---|
| RMS | SD | Max | p-value | RMS | SD | Max | p-value | |
| Translations(mm) | ||||||||
| Vert. (AP) | 0.42 | 0.42 | 2.14 | .463 | 0.58 | 0.55 | 2.42 | <.0001 |
| Long. (SI) | 0.51 | 0.39 | 1.46 | <.0001 | 0.66 | 0.61 | 1.75 | <.0001 |
| Lat. (LR) | 0.75 | 0.47 | 1.58 | <.0001 | 0.73 | 0.70 | 2.4 | .099 |
| Rotations (°) | ||||||||
| Pitch (Rx) | 0.52 | 0.51 | 2.03 | .067 | 0.66 | 0.66 | 2.27 | .147 |
| Roll (Rz) | 0.44 | 0.38 | 1.31 | <.0001 | 0.77 | 0.67 | 1.93 | <.0001 |
| Yaw (Ry) | 0.57 | 0.42 | 1.92 | <.0001 | 0.65 | 0.59 | 2.23 | <.0001 |
kV-CBCT, kV-cone beam computed tomography.