@article{fei2012mr,
  title={MR/PET quantification tools: Registration, segmentation, classification, and MR-based attenuation correction},
  author={Fei, Baowei and Yang, Xiaofeng and Nye, Jonathon A and Aarsvold, John N and Raghunath, Nivedita and Cervo, Morgan and Stark, Rebecca and Meltzer, Carolyn C and Votaw, John R},
  journal={Medical physics},
  volume={39},
  number={10},
  pages={6443--6454},
  year={2012},
  publisher={Wiley Online Library}
}