Table 3.
Mechanical tests
| Item | Test | Frequency | Tolerance |
|---|---|---|---|
| M1 | Localizing lasers | Daily | 2 mm |
| Monthly | 1 mm | ||
| M2 | Optical distance indicator | Daily | 2 mm at isocenter |
| Monthly | 2 mm over clinical range | ||
| M3 | Jaw position indicators | Daily | 2 mm per jaw for single field |
| Monthly | 2 mm per jaw for clinical range of motion | ||
| M4 | Light to radiation field coincidence | After Service | 2 mm per jaw |
| M5 | Leaf position accuracy | Monthly | 1 mm |
| M6 | Gantry/collimator angle indicators | Monthly | 1° |
| M7 | Physical graticule (port film graticule) | Monthly | 2 mm |
| M8 | Cross‐hair centering | Monthly | 1 mm |
| M9 | Treatment couch positions (absolute and relative) | Monthly |
Abs: 2 mm and 1°; Rel: 1 mm over 10 cm and 0.5° over 3° |
| M10 | Radiation isocentricity (MLC/jaw radiation isocenter with collimator, gantry and couch rotation) | Annual | 2 mm diametera |
| M11 | Electron applicator collimator settings/physical inspection/interlocks | Annual | Same as acceptance/TPS |
| M12 | Stereotactic accessories, lockouts, cone coding | Daily | Functional |
| Annual | Functional | ||
| M13 | Accessory latches/interface (all slots) | Annual | Functional |
a
For SRS‐SBRT applications, refer to the relevant AAPM Medical Physics Practice Guideline.