Table 2.

Multileaf collimator errors and gamma pass rates following delivery of centre specific plans. Median values are also shown (minimum and maximum)

Parameter	TrueBeam (N = 2) (n = 4)	2300IX (N = 5) (n = 10)
RMS values for leaves in Bank A (mm)	0.13 (0.11–0.14)	0.41 (0.24–0.46)
RMS values for leaves in Bank B (mm)	0.13 (0.12–0.14)	0.42 (0.25–0.47)
Gamma pass rate (3%3mm)	97.4 (84.0–100.0)	100.0 (98.9–100.0)
Gamma pass rate (2%2mm)	78.3 (50.5–97.9)	98.2 (85.4–99.7)

n, number of arcs analyzed; N, number of centres; RMS, root mean square.