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Surrogate value: COM Single Visicoil marker vs. COM GTV
LAT
AP
CC
Ex. 1
LAT
AP
CC
Ex. 2
(x,y,z)
COM
,
Visicoil
=(x,y,z)
COM,GTV
+Cte
Max deviation
1.2 mm in CC
(CT slice 2 mm)
For large amplitudes
(> 15 mm p2p):
Exhale
Mid. Vent.
Stable
Artefact
4D CT Artefacts
Patient specific pre-treatment QA
•
Verifying if marker motion is appropriate surrogate of tumour motion
SBRT 2015 - D. Verellen
42