Deformable Image Registration, Contour Propagation and Dose Mapping

• Image quality (noise, artefact, slice thickness, etc) • Image modality (CT, CBCT, MRI, US, etc.) • Multi-image modalities (a key factor for ART as the planning and daily patient images are typically not of the same type) • Imaging protocol and reconstruction • Clinical application (contour propagation, dose mapping, dose summation, motion compensation, tumor evolution) • Clinical site (head & neck, pelvis, lung, etc.) • Vendor implementation.