Abstract
Thousands of operations are annually guided with computer assisted surgery (CAS) technologies. As the use of these devices is rapidly increasing, the reliability of the devices becomes ever more critical. The problem of accuracy assessment of the devices has thus become relevant. During the past five years, over 200 hazardous situations have been documented in the MAUDE database during operations using these devices in the field of neurosurgery alone. Had the accuracy of these devices been periodically assessed pre-operatively, many of them might have been prevented.The technical accuracy of a commercial navigator enabling the use of both optical (OTS) and electromagnetic (EMTS) tracking systems was assessed in the hospital setting using accuracy assessment tools and methods developed by the authors of this paper. The technical accuracy was obtained by comparing the positions of the navigated tool tip with the phantom accuracy assessment points. Each assessment contained a total of 51 points and a region of surgical interest (ROSI) volume of 120x120x100 mm roughly mimicking the size of the human head.The error analysis provided a comprehensive understanding of the trend of accuracy of the surgical navigator modalities. This study showed that the technical accuracies of OTS and EMTS over the pre-determined ROSI were nearly equal. However, the placement of the particular modality hardware needs to be optimized for the surgical procedure. New applications of EMTS, which does not require rigid immobilization of the surgical area, are suggested.
Highlights
Current operating rooms are equipped with complex devices and machines
The main advantage reached with computer assisted surgery (CAS) is that the surgical procedure can be planned preoperatively with images taken from the patient and performed using surgical navigators for instrument guidance (Wiles et al 2004; Beaulieu et al 2008; Grunert et al 2003; Kücker et al 2006; Mascott 2005)
For the Optical tracking system (OTS) (Figure 2A) the dependence of the error on the distance from the optical camera to the object can be seen, as the error is clearly skewed to the furthest edge of the region of surgical interest (ROSI) volume
Summary
Current operating rooms are equipped with complex devices and machines. The most critical operations in minimally invasive surgery rely largely on the seamless co-operation between these technologies and the surgeons. The main advantage reached with CAS is that the surgical procedure can be planned preoperatively with images taken from the patient and performed using surgical navigators for instrument guidance (Wiles et al 2004; Beaulieu et al 2008; Grunert et al 2003; Kücker et al 2006; Mascott 2005). This is made possible by spatially linking the patient and the surgical instrument to the image data (Kücker et al 2006). Two main modalities of navigator tracking have been adopted, namely the optical (OTS) and electromagnetic (EMTS) tracking systems
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
