Dosimetry:
X-ray flatness change from baseline 1%
X-ray symmetry change from baseline 1%
Electron flatness change from baseline 1%
Electron symmetry change from baseline 1%
SRS arc rotation mode:  (range: 0.5–10 MU/deg)
Monitor units set vs delivered: for SRS/SBRT
1.0 MU or 2% (whichever is greater)
Gantry arc set vs delivered: 1.0° or 2% (whichever is greater)