Layer, T., Blaickner, M., Knäusl, B., Georg, D., Neuwirth, J., Baum, R. P., Schuchardt, C., Wiessalla, S., & Matz, G. (2015). PET image segmentation using a Gaussian mixture model and Markov random fields. EJNMMI Physics. https://doi.org/10.1186/s40658-015-0110-7