Appendix I.
Recommended frequencies for simulator QC tests
| Test and frequency | Tolerance |
| Daily | |
| Crosswires | 1 mm |
| Optical distance indicator | 2 mm |
| Isocentric lasers | 1 mm |
| Optical/radiation field size (10 cm x 10 cm) | 2 mm |
| Optical/radiation field alignment (10 cm x 10 cm) | 1 mm |
| Monthly | |
| Isocentricity of gantry | 1 mm |
| Alignment of FAD movement | 1 mm |
| Crosswire rotational 90 cm and 110 cm FAD | 1 mm |
| Couch | |
| Isocentricity of couch rotation | 2 mm |
| Alignment of couch vertical movement | 2 mm |
| Optical/radiation field sizes (all sizes) | 2 mm/1.0% |
| Optical/radiation field alignment (all sizes) | 1 mm/0.5% |
| Congruence of vertically and laterally opposed fields | 1 mm |
| Positional readouts | 1 mm/0.5% |
| Alignment of shadow trays | 1 mm |
| Radiographic QC tests | see text |
| Six monthly | |
| Fluoroscopic image quality | see text |
| Alignment of fine and broad focus radiographic images | 0.5 mm |
| Annual | |
| Redefine isocentre | 1 mm |
| Crosswires and field wires at all gantry and diaphragm angles and FADs – all film | as above |
| Optical distance indicator at all gantry angles | 2 mm |
| Gantry and diaphragm angles | 0.5° |
| Loaded couch tests | see text |
| Full tests on fluoroscopic and radiographic system | see text |
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