Original Research
Accuracy of an Image-Guided Navigation System for Pelvic Sugery Based on a Multimodality Registration Object: A Cadaver Study
Am J Orthop. 2010 August;39(8):382-385
Author and Disclosure Information
Martin Thaler, MD, Eckart Mayr, MD, Alexandra Williams, MD, Jose Moctezuma de la Barrera, PhD, and Michael Nogler, MD, MA, MSc
Dr. Thaler is Surgeon-in-Training and Registrar, Dr. Mayr is Associate Professor of Orthopaedic Surgery, and Dr. Williams is Surgeon-in-Training and Registrar, Medical University Innsbruck, Innsbruck, Austria.
Dr. Moctezuma de la Barrera is Engineer, Stryker Leibinger, Freiburg, Germany.
Dr. Nogler is Full Professor and Head of the Institute of Experimental Orthopaedics, Medical University Innsbruck, Innsbruck, Austria.
Accurate registration of external landmarks is often required for computer-aided surgery. In the study reported here, we investigated the influence of a new externally fixated multimodality registration object (MRO) on the accuracy of an image-guided navigation system in a human cadaver pelvis. With the MRO placed on the ipsilateral anterior superior iliac spine (ASIS), 14 of 17 target points showed a mean deviation (1.1 mm) that was significantly lower than that registered with the MRO on the contralateral ASIS (2.5 mm). In addition, the distance of target points from the MRO and the deviation of target points were highly correlated. This MRO provides a feasible means for achieving improved registration in computer-aided surgery of the pelvis.