TABLE 10.

Basic TPS validation tests for electron beams and minimum tolerance values

#	Dose comparison objective	Examples	Tolerances
8.1	Verify that TPS reproduces the absolute dose under reference calibration conditions	Calculate the absolute dose per MU to the reference point using the same SSD and cone size as the calibration protocol	0.5%
8.2	Basic model verification with shaped fields	PDD and profile comparison of custom cutouts at standard and extended SSDs	3%/3 mm
8.3	Surface irregularities/obliquity	PDD and/or profile comparison of obliquely incident fields using reference cone and nominal clinical SSD	5%
8.4	Inhomogeneity test	Compare manual dose calculation or chamber measurement to TPS with reference cone and nominal clinical SSD	7%