Int J CARS (2017) 12:1425–1437 DOI 10.1007/s11548-017-1594-5 ORIGINAL ARTICLE Workﬂow and simulation of image-to-physical registration of holes inside spongy bone 1 2 3 Jan Bergmeier · J. Michael Fitzpatrick · Dorothea Daentzer · 4 1 1 Omid Majdani · Tobias Ortmaier · Lüder A. Kahrs Received: 17 November 2016 / Accepted: 24 April 2017 / Published online: 6 May 2017 © CARS 2017 Abstract the drill trajectory reveals increasing registration accuracy as Purpose Mastoid cells as well as trabecula provide unique more bone-air patterns become available as landmarks with bone structures, which can serve as natural landmarks for reg- the highest accuracy obtained at the center point. At the facial istration. Preoperative imaging enables sufﬁcient acquisition recess and the cochlea, TREs are (0.363 ± 0.169) mm and of these structures, but registration requires an intraoperative (0.553 ± 0.262) mm, respectively. counterpart. Since versatile surgical interventions involve Conclusion This contribution demonstrates a new method drilling into mastoid cells and trabecula, we propose a reg- for registration via endoscopic acquisition of small features istration method based on endoscopy inside of these drill like trabecula or mastoid cells for image-guided procedures. holes. It has the potential to revolutionize bone registration because Methods
International Journal of Computer Assisted Radiology and Surgery – Springer Journals
Published: May 6, 2017
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