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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