TG-40 Annual

TG-40
Annual

Dosimetry Tolerance
X-Ray Output Calibration Constancy 2%
Field size dependence of x-ray output constancy 2%
Output factor constancy for electron applicators 2%
Central axis parameter constancy (PDD.TAR) 2%
Off axis factor constancy 2%
Transmission factor constancy for all treatment accessories 2%
Wedge transmission factor constancy** 2%
Monitor chamber linearity 2%
X-ray output constancy vs gantry angle 2%
Electron Output Constancy vs gantry angle 2%
Off axis factor constancy vs gantry angle 2%
Arc mode Mfrs specs

Mechanical Checks
Collimator rotation isocenter 2 mm diameter
Gantry rotation isocenter 2 mm diameter
Couch rotation isocenter 2 mm diameter
Coincidence of collimetry,gantry, couch axes with isocenter 2 mm diameter
Coincidence of radiation and mechanical isocenter 2mm diameter
Table top sag 2mm
Vertical travel of table 2mm