2017_SBRT_Course Book

IGRT/frameless: Intrafraction motion

• 40 patients (66 brain metastases) • Immobilized with Brainlab frameless mask, ExacTrac 6DOF set-up

-1.5 -1 -0.5 0 0.5 1 1.5 2 Intrafraction motion

Vertical Shift [mm] Longitudinal shift [mm] Lateral shift [mm] Vertical rotation [°]

• Intrafraction motion: mean 3D of 0.58 mm (SD: 0.42 mm)

Gevaert et al , 2012 SBRT 2017 - D. Verellen

45