IMRT 2018

Cyber knife

• Profile: transversal and longitudinal. Energy. Output • Delivery is based on image guidance: bones, soft tissue, fiducial markers, … • Verify tracing accuracy • Verify geometric iso-centre • Verify laser/beam aligned to iso-centre Similar to 3D conformal on Linac

Isocrystal defines the geometricl iso-centre

4 3 2 1

Dieterich, MedPhys 38,2011. Report of AAPM TG 135: Quality assurance for robotic radiosurgery Vandervoort, J Appl Clin Med Phys 19,2018. COMP Report: CPQR technical quality control guidelines for CyberKnife Technology