Table 1 Systematic and random translational errors for conventional positioning with skin marks (laser crosses), infrared body markers and bone fusion (via ExacTrac/Novalis Body X-ray system = ETNB) by using the marker-based prostate position as “correct” reference position
From: Appropriate patient instructions can reduce prostate motion
Setup | LR error [mm] | SI error [mm] | AP error [mm] |
|---|---|---|---|
Skin marks | |||
Σ | 1.56 | 2.46 | 1.87 |
σ | 1.82 | 2.31 | 2.51 |
Margin | 5.17 | 7.76 | 6.43 |
Infrared markers | |||
Σ | 1.35 | 0.75 | 0.96 |
σ | 1.73 | 1.10 | 1.71 |
Margin | 4.59 | 2.64 | 3.60 |
Bone fusion (ETNB) | |||
Σ | 0.53 | 1.38 | 1.10 |
σ | 0.75 | 1.84 | 1.79 |
Margin | 1.85 | 4.74 | 4.00 |