Table 1.

Directional Tolerances for ArcCheck phantom and QA platform.

Directional component	Tolerance	Tolerance in length
ArcCheck rotation	±0.5°	±1.16 mm in X
ArcCheck tilt	±0.25°	±1.93 mm in Y
QA platform translation	±0.3 mm	±0.3 mm in X
QA platform translation	±0.3 mm	±0.3 mm in Y