Technical accuracy of an O-arm registered surgical navigator

Abstract

The objective of this study was to assess the accuracy of a commercial surgical navigator using optical tracking modality with automated registration between O-arm images and the scanned object. Automated registration was enabled by using the spine navigation software of the navigator. The used phantom was designed by the authors of this paper. The surgical navigators and the O-arm are routinely used at Oulu University Hospital, Oulu, Finland. The distances measured with the surgical navigator from the fixed origin of the phantom were compared to the known phantom accuracy assessment coordinates. The error of the surgical navigator was the difference between measured and true values. The mean displacement error was 0.20 mm with a standard deviation of 0.14 mm. The results show that automated registration is very reliable for image guided surgery (IGS) and that the present accuracy assessment method can be used to periodically check surgical navigator accuracy using O-arm data.

Radiation exposure in spine surgery using an image-guided system based on intraoperative cone-beam computed tomography: analysis of 107 consecutive cases

“…In more recent years, the development of new intraoperative devices able to perform 3D imaging has become the focus of attention, especially in spine surgery. In fact, the advent of a cone beam-based imaging system (O-arm system, Medtronic, Inc.), especially when associated with an image-guided system (IGS), was seen as a revolution, 17 and excellent results were reported, 3,9,10,13,21,22,27 with accuracy in screw placement up to 98.5%. 4 However, despite these encouraging results there is still debate regarding where and when this technology should be used.…”

Radiation Dosimetry of Intraoperative Cone-Beam Compared with Conventional CT for Radiofrequency Ablation of Osteoid Osteoma

“…This is especially useful in axial locations that are deep or difficult to palpate (see Appendix). Intraoperative three-dimensional imaging simultaneous with navigation overcomes the problem of time separation between CT imaging and insertion of the Kirschner wire or probe, and it is more accurate than using paired points and surface-matching techniques 44 .…”

Cerebral Angiography for Multimodal Surgical Planning in Epilepsy Surgery: Description of a New Three-Dimensional Technique and Literature Review

“…The safety profile of electrode implantation with 3D DSA guidance is excellent, likely due to the detailed visualization of the cerebrovasculature and the low distortion inherent with CT scanning (12,23,25). In a previous study (10) we reported our first 81 cases of SEEG implantations based on our 3D DSA technique, without any major intracranial bleedings and only two minor ones.…”