title: A non-invasive patient registration and reference system for interactive intraoperative localization in intranasal sinus surgery.
abstract: A basic problem common to all systems for computer assisted surgery (CAS) is patient referencing, or the transfer of preoperative image data to the intraoperative pathology. The authors describe a highly precise CAS system with non-invasive referencing that can be used in ear, nose and throat (ENT) surgery of the paranasal sinuses. It is based on optical digitizing with several custom-made self-localizing surgical instruments. The accuracy of the system was tested in an experimental model using a plastic head. Measurements of repositioning the reference bow had a mean error of 0.81 mm +/- 0.31 mm. The system was evaluated clinically with 11 patients who received surgery for different pathologies of the paranasal sinuses. These trials met with a high rate of success and specific results are reported.
authors.affiliation: Department of Otorhinolaryngology, University of Basel, Kantonsspital, Switzerland.
authors.forename: R
authors.initials: R
authors.lastname: Hauser
authors.forename: B
authors.initials: B
authors.lastname: Westermann
authors.forename: R
authors.initials: R
authors.lastname: Probst
mesh_terms: D001706:Biopsy; D006801:Humans; D007430:Intraoperative Care; D010254:Paranasal Sinus Diseases / Q000000981:diagnostic imaging* / Q000601:surgery*; D019047:Phantoms, Imaging; D011187:Posture; D011300:Preoperative Care; D011856:Radiographic Image Enhancement / Q000379:methods*; D012086:Reoperation; D015203:Reproducibility of Results; D013813:Therapy, Computer-Assisted / Q000295:instrumentation / Q000379:methods*; D014057:Tomography, X-Ray Computed