Molecular Imaging 2017

Automatic delineation

YAPETISM (yet another PET image segmentation method …) • Thresholding 

Fixed threshold (e.g. predefined SUV or % of maximal SUV)  Adaptive thresholding („contrast oriented“, „source- to-background“) • Region growing (variant of contrast) • watershed (variant of contrast) • pipeline (multi-step) • gradient based (edge finding) • hybrid (including CT information) Zaidi EJNMMI 2010 Shepherd, 2011, submitted Lee R&O 2010