Notes on annual tests

AK1	Using a high‐quality dosimetry system calibrated against the local secondary standard, all beams and cones in use are recalibrated
AK2	Timer and end‐effect error measurement may be performed in conjunction with AK3
AK3	Output linearity measurement for a clinically used filter/cone combination at a standard SSD and a dose range of 10−1000 cGy
AK4	Output reproducibility verification for a clinically used filter/cone combination. These measurements should be repeated at typical tilt and head rotation used for treatments
AK5	Output error when the beam is interrupted during the irradiation for a clinically used filter/cone combination
AK6	The HVL of any clinically used beams is measured. The HVLs measured in millimeters of Al or millimeters of Cu as appropriate are compared with the values obtained at commissioning. These tolerances acknowledge measurement uncertainty
AK7	Focal spot—quantitative measurement, assessed relative to acceptance test value where applicable
AK8	Using a pin hole or resolution tool
AK9	Verification of percentage depth dose measurements for all used filter/cone combinations against baseline
AK10	Verification of inplane and crossplane profiles at different depths for all used filter/cone combinations against baseline
AK11	To ensure redundancy and adequate monitoring, a second qualified medical physicist must independently verify the implementation, analysis, and interpretation of the quality control tests at least annually