| Â | Mean [mm] j = 1...23 | Range [mm] j = 1...23 |
|---|
Random setup error
| Â | Â |
Left-right | 2.3 | -7.9/7.4 |
Superior-inferior | 2.7 | -8.6/7.8 |
Anterior-posterior | 2.7 | -12.1/5.4 |
Random prostate movement
| Â | Â |
Left-right | 1.4 | -5.5/6.3 |
Superior-inferior | 2.3 | -5.9/8.6 |
Anterior-posterior | 2.7 | -7.0/8.0 |
Random total error
| Â | Â |
Left-right | 2.9 | -8.0/6.6 |
Superior-inferior | 3.9 | -11.5/8.2 |
Anterior-posterior | 4.3 | -14.9/11.2 |
- The standard deviations of measured deviations Δsij, Δmij, Δtotij around the systematic errors (of each patient j = 1...23) <Δs>j, <Δm>j, <Δtot>j after averaging over i = 1,..., 8 weekly controls provide the random errors sqrt(1/7Σi = 1..8(<Δs>j - Δsij)2), sqrt(1/7Σi = 1..8(<Δmi>j - Δmij)2), sqrt(1/7Σi = 1..8(<Δtoti>j - Δtotij)2) for patient j = 1,..., 23. They are splitted into the RL, SI and AP direction for every error type, i.e. setup error, prostate movement and total error (see Fig. 1 for explanation of symbols). The mean random errors after averaging over 23 patients and their range, i.e. maximum deviations in both orientations of the axes, are given in the table.
