Table 2.

Quality control tests for conventional simulators (tolerances and action levels are specified in millimeters unless otherwise stated)

Designator	Test	Performance
		Tolerance	Action
Daily
DS1	Door interlock	Functional
DS2	Motion interlock	Functional
DS3	Beam status indicators	Functional
DS4	Emergency off buttons	Functional
DS5	Collision avoidance	Functional
DS6	Lasers/crosswires	1	2
DS7	Optical distance indicator	1	2
DS8	Crosswires/reticle/block tray	1	2
DS9	Light/radiation coincidence	1	2
DS10	Field size indicators	1	2
Monthly
MS1	Gantry angle readouts	0.5°	1°
MS2	Collimator angle readouts	0.5°	1°
MS3	Couch position readouts	1	2
MS4	Alignment of FAD movement	1	2
MS5	Couch isocenter	2	3
MS6	Couch parallelism	1	2
MS7	Laser/crosswire isocentricity	1	2
MS8	Optical distance indicator	1	2
MS9	Crosswire centering	1	2
MS10	Light/radiation coincidence	1	2
MS11	Field size indicators	1	2
MS12	Records	Complete
Six‐monthly
SS1	Lead apron	Functional
SS2	${\text{kV}}_{\mathrm{p}}$	5%	10%
SS3	Reference dosimetry	5%	10%
SS4	Beam quality (HVL)	5%	10%
SS5	Automatic exposure control	5%	10%
SS6	Focal spot	Reproducible
SS7	Contrast	Reproducible
SS8	Resolution	Reproducible
SS9	Fluoroscopic timer	5%	10%
Annually
AS1	Redefine isocenter	1	2
AS2	Couch deflection	3	5
AS3	Alignment of focal spots	0.5	1
AS4	Independent quality control review	Complete