Skip to main content

Table 8 Patient (re-)positioning and IGRT

From: Clinical practice of image-guided spine radiosurgery - results from an international research consortium

  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