IMRT

Image guidance accuracy

“ Hidden-target test on anthropomorphic phantom, pelvic region ”

kV planar, kV CBCT imaging

iso 2mm BB in isocenter

Plan 30x30mm open fields

Treatment plan delivery

Phantom positionning

EPID Image analysis

-EPID images (0.2mm pixels) -Automatic detection of field outline (Hough transform) and BB (Kernel based) -Detection estimated accuracy 0.1 mm