SBRT2015

Patient specific pre-treatment QA • Verifying if marker motion is appropriate surrogate of tumour motion

Surrogate value: COM Single Visicoil marker vs. COM GTV

Lung

Liver

In Lung, for large amplitudes (> 15 mm p2p):

Stable

Artefact

Multi-modal delineation on one 4D CT phase + RIGID propagation based on fiducial marker

MR fusion

PET-CT fusion

Exhale

Mid.

4D CT Artefacts

43

SBRT 2015 - D. Verellen