R
Robert Elfring
Researcher at RWTH Aachen University
Publications - 11
Citations - 210
Robert Elfring is an academic researcher from RWTH Aachen University. The author has contributed to research in topics: Imaging phantom & Knee Joint. The author has an hindex of 5, co-authored 11 publications receiving 170 citations.
Papers
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Journal ArticleDOI
Assessment of optical localizer accuracy for computer aided surgery systems
TL;DR: The intrinsic localizer accuracy was determined for single markers as well as for tools using a volumetric measurement protocol on a coordinate measurement machine, and revealed that only the Polaris P4 shows significant warm-up behavior, with a significant shift of accuracy being observed within 42 minutes of being switched on.
Journal ArticleDOI
Electromagnetic tracking for CT-guided spine interventions: phantom, ex-vivo and in-vivo results.
Philipp Bruners,Tobias Penzkofer,Markus Nagel,Robert Elfring,Nina Gronloh,Thomas Schmitz-Rode,Rolf W. Günther,Andreas H. Mahnken +7 more
TL;DR: Pre-interventional computed tomography datasets were transferred to the navigation system and puncture trajectories were planned and a coaxial needle was advanced along the trajectories while the position of the needle tip was monitored in real time.
Journal Article
On the way to a cable free operating theater: An operating table with integrated multimodal monitoring
Tobias Wartzek,Robert Elfring,Arne Janssen,Benjamin Eilebrecht,Marian Walter,Steffen Leonhardt +5 more
TL;DR: A novel artifact detection method for capacitive electrocardiogram measurements based on an optical measurement is presented and together with an adaptive threshold based algorithm, intervals with artifacts can reliably be identified resulting in a robust estimation of heart rate.
Journal ArticleDOI
A new approach to implant alignment and ligament balancing in total knee arthroplasty focussing on joint loads.
Frauke Zimmermann,Christoph Schwenninger,Ulrich Nolten,Franz Peter Firmbach,Robert Elfring,Klaus Radermacher +5 more
TL;DR: First studies with the genALIGN system, including a comparison with an imageless navigation system, show the feasibility of the concept and the impact of ligament tensions on knee joint loads can be determined over the whole range of motion.
Book ChapterDOI
Vascular electromagnetic tracking: experiences in phantom and animal cadaveric models
Tobias Penzkofer,P Bruners,Peter Isfort,Robert Elfring,Andreas Fritschi,F. van Roost,Marcus Hormes,Rolf W. Günther,Thomas Schmitz-Rode,Andreas H. Mahnken +9 more
TL;DR: This study assesses the feasibility of navigated vascular interventions in a rapid prototyped anthropomorphic phantom and swine cadaveric model using electromagnetic tracking (EMT) in combination with a CT image data set.