A multi-institution evaluation of MLC log files and performance in IMRT delivery

Table 2 Summary of log file error results sorted by treatment type

Modality	Institution	Mean leaf RMS error (mm)	Mean 95th percentile error (mm)
Step & shoot	B	0.004	0.020
	F	0.011	0.020
	Overall	0.008	0.020
Dynamic	A	0.37	0.69
	B	0.25	0.61
	C	0.22	0.45
	D	0.22	0.47
	E	0.30	0.65
	Overall	0.32	0.64
VMAT	A	0.46	0.96
	E	0.46	0.94
	Overall	0.46	0.95

Aggregated RMS error and 95^th percentile error values of each treatment type with values from contributing institutions and overall values listed.