Atlas-Based Multiorgan Segmentation for Dynamic Abdominal PET

Region of interest (ROI) delineation is required to extract tissue time-activity curves (TACs) in dynamic PET studies, to analyze functional changes or estimate physiological parameters. In this paper, we present an automatic framework for atlas-based multiorgan segmentation in abdominal dynamic PET images with three different methods (4D-pair, 4D-PCA, and 3-D), incorporating probabilistic atlas i...