Noninvasive CT to Iso-C3D registration for improved intraoperative visualization in computer assisted orthopedic surgery

Tobias Rudolph; Lars Ebert; Jens Kowal

doi:10.1117/12.653006

13 March 2006 Noninvasive CT to Iso-C3D registration for improved intraoperative visualization in computer assisted orthopedic surgery

Tobias Rudolph, Lars Ebert, Jens Kowal

Author Affiliations +

Proceedings Volume 6141, Medical Imaging 2006: Visualization, Image-Guided Procedures, and Display; 61411X (2006) https://doi.org/10.1117/12.653006
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

Supporting surgeons in performing minimally invasive surgeries can be considered as one of the major goals of computer assisted surgery. Excellent intraoperative visualization is a prerequisite to achieve this aim. The Siremobil Iso-C^3D has become a widely used imaging device, which, in combination with a navigation system, enables the surgeon to directly navigate within the acquired 3D image volume without any extra registration steps. However, the image quality is rather low compared to a CT scan and the volume size (approx. 12 cm³) limits its application. A regularly used alternative in computer assisted orthopedic surgery is to use of a preoperatively acquired CT scan to visualize the operating field. But, the additional registration step, necessary in order to use CT stacks for navigation is quite invasive. Therefore the objective of this work is to develop a noninvasive registration technique. In this article a solution is being proposed that registers a preoperatively acquired CT scan to the intraoperatively acquired Iso-C^3D image volume, thereby registering the CT to the tracked anatomy. The procedure aligns both image volumes by maximizing the mutual information, an algorithm that has already been applied to similar registration problems and demonstrated good results. Furthermore the accuracy of such a registration method was investigated in a clinical setup, integrating a navigated Iso-C^3D in combination with an tracking system. Initial tests based on cadaveric animal bone resulted in an accuracy ranging from 0.63mm to 1.55mm mean error.

Citation Download Citation

Tobias Rudolph, Lars Ebert, and Jens Kowal "Noninvasive CT to Iso-C3D registration for improved intraoperative visualization in computer assisted orthopedic surgery", Proc. SPIE 6141, Medical Imaging 2006: Visualization, Image-Guided Procedures, and Display, 61411X (13 March 2006); https://doi.org/10.1117/12.653006

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