paediatrics Brussels 17

Target definition and margins

SIOP Ependymoma II FINAL Protocol Version 1.2_November 14th, 2013

MRI obtained immediately before radiotherapy should be used for treatment planning. To properly delineate target volumes for this study , complete information defining the extent of disease before and after surgery is needed. Pre- and post-operative MRI, in particular pre- and post-gadolinium contrast T1, T2, and FLAIR sequences , should be reviewed. Sequences that best define post-operative tumour bed and residual disease at each time point should be utilized to define the GTV and registered to planning CT.