Table 1:
The optimal overlap widths of the two dynamic field edges matched at a distance of 220 cm from the radiation source. When overlapped optimally, the dose variation is within ±10% at the field junction.
Leaf motion length (cm)
2
3
4
5
Optimal overlap width (cm)
3.5
5.0–5.5
6.5–7.5
8.5–10.0