@misc{indiciaea6f153bb5054,
  title = {Frameless patient registration using ultrasonic imaging: a preliminary study.},
  author = {T Ault and M W Siegel},
  year = {1995},
  doi = {10.1002/(sici)1522-712x(1995)1:2<94::aid-igs4>3.0.co;2-g},
  url = {https://pubmed.ncbi.nlm.nih.gov/9079433/},
  note = {Source identifier: 9079433}
}