@inproceedings{wein2011motion,
  author = {W. Wein and A. Ladikos},
  title = {Detecting patient motion in projection space for cone-beam computed tomography},
  booktitle = {MICCAI 2011 Proceedings},
  series = {Lecture Notes in Computer Science},
  publisher = {Springer},
  month = Sep,
  year = 2011
}