Table 8 Patient (re-)positioning and IGRT
| Â | UHW | UPMC | UofT | UVAMC | RSMC |
|---|---|---|---|---|---|
Treatment prone or supine | Supine | Supine | Supine | supine | Supine |
Immobilization device | Cervical: Thermoplastic mask; otherwise BodyFIX | Cervical down to T5: aquaplast face mask; otherwise BodyFIX | Cervical down to T2/3 s frame; otherwise BodyFIX | Cervical: Thermoplastic mask; otherwise BodyFIX | Cervical: Aquaplast mask with Accuform support secured to modified S-frame; otherwise BodyFIX |
Image guidance technology | Cone-beam CT | Cone-beam CT | Cone-beam CT | Cone-beam CT | Cone-beam CT |
Frequency of IGRT | Daily | Daily | Daily | Daily | Daily |
Correction of rotational set-up errors | Yes - Hexapod couch | Yes - Hexapod couch | Yes - Hexapod couch | Yes - Hexapod couch | Yes - Hexapod couch |
Action level for correction of set-up errors | 1 mm translation, 1 degree rotation | 1 mm translation, 1 degree rotation | 1 mm translation, 1 degree rotation | 2 mm translation, 1 degree rotation | 1 mm translation, 0.3 degree rotation |
Second imaging after couch adjustment prior to treatment | Yes | Yes | Yes | Yes | Yes |
Methods for intra-fractional patient monitoring | None | Cone-beam CT imaging after one and two thirds through the treatment | One to two intra-treatment Cone-beam CT scans | One intra-fraction cone-beam CT scan half-way through treatment | Typical one or two mid treatment cone-beam CTs |
Imaging after treatment | Yes | No | Yes | Yes | No |