Table 2.

List of additional collimator settings for Profiler 2 measurements of the major leaf offsets in Sec. 2B2. The fields listed are for measurement of the X1 reference leaf at retracted, SYM fields, and extended, X1 fields; the CAX fields were measured during the minor leaf offsets in Sec. 2B1a. Settings are based on the IEC 1217 Convention.

Field name	Collimator
	MLC X1 (mm)	MLC X2 (mm)	Backup jaw X1 (mm)	Backup jaw X2 (mm)	Jaw Y1 (mm)	Jaw Y2 (mm)
SYM 30%	74	−74	100	−100	200	200
SYM 50%	75	−75	100	−100	200	200
SYM 70%	76	−76	100	−100	200	200
X1 30%	−76	−150	100	−100	200	200
X1 50%	−75	−150	100	−100	200	200
X1 70%	−74	−150	100	−100	200	200