QA Tolerances Flashcards
What is the electron output constancy requirement?
Electron output constancy must be checked weekly with a tolerance of 3%, except for machines with unique e-monitoring requiring daily checks.
What is the laser localization tolerance for Non-IMRT?
The laser localization tolerance is 2 mm.
What is the distance indicator (ODI) tolerance at iso for Non-IMRT?
The distance indicator (ODI) tolerance at iso is 2 mm.
What is the collimator size indicator tolerance for Non-IMRT?
The collimator size indicator tolerance is 2 mm.
What are the safety requirements for door interlock?
The door interlock must be functional to ensure the beam is off when the door is open.
What is the laser localization tolerance for IMRT?
1.5 mm
What is the laser localization tolerance for SBRT/SRS?
1 mm
What is the ODI @ iso tolerance for IMRT?
2 mm
What is the ODI @ iso tolerance for SBRT/SRS?
2 mm
What is the collimator size indicator tolerance for IMRT?
2 mm
What is the collimator size indicator tolerance for SBRT/SRS?
1mm
What is the daily CT QA Torrance for water?
0 +/- 5 HU
What is the daily x or y direction QA tolerance for CT?
+/- 1 mm
