@Article{holler17pls,
title = {Evaluation of Parallel Level Sets and Bowsher's Method as Segmentation-Free Anatomical Priors for Time-of-Flight PET Reconstruction},
author = {Georg Schramm and Martin Holler and Ahmadreza Rezaei and Kathleen Vunckx and Florian Knoll and Kristian Bredies and Fernando Boada and Johan Nuyts},
journal = {IEEE Transaction on Medical Imaging},
year = {2017},
number = {2},
pages = {590 - 603},
volume = {37},
doi = {10.1109/TMI.2017.2767940}
}