In-room imaging and MR planning

Image registration • Misregistration in PET/CT can occur:

Axial fused FDG PET–CT image of axilla incl. lymph node

• CT-series of PET/CT represents reference frame • Image registration may be required : – In multimodal delineation applications (e.g. +MRI) – If PET/CT is not acquired in RT setting (then coreg. with planning CT) – For IGRT with e.g. CBCT