Three-monthly

Question 1

Indicator lights

Answer 1

Functional

Question 2

Junction homogeneity

Answer 2

2 mm (or 20%)

Question 3

Output variation with gantry angle

Answer 3

Calibration +/- 2%

Question 4

Dose check for non-standard field size and SSD

Answer 4

+/- 2%

Question 5

Optical field size variation for different field sizes

Answer 5

2 mm

Question 6

VMAT synchronicity

Answer 6

Test dependent