@misc{indiciae38ee7f06dd55,
  title = {Three-dimensional reconstruction for a multi-ring positron tomograph.},
  author = {D W Townsend and M Defrise and A Geissbühler and T Spinks and T Jones},
  year = {1991},
  url = {https://pubmed.ncbi.nlm.nih.gov/1988969/},
  note = {Source identifier: 1988969}
}