TY  - JOUR
A1  - Taeger, Johannes
A1  - Müller-Graff, Franz-Tassilo
A1  - Neun, Tilmann
A1  - Köping, Maria
A1  - Schendzielorz, Philipp
A1  - Hagen, Rudolf
A1  - Rak, Kristen
T1  - Highly precise navigation at the lateral skull base by the combination of flat-panel volume CT and electromagnetic navigation
JF  - Science Progress
N2  - This study aimed to evaluate the feasibility and accuracy of electromagnetic navigation at the lateral skull base in combination with flat panel volume computed tomography (fpVCT) datasets. A mastoidectomy and a posterior tympanotomy were performed on 10 samples of fresh frozen temporal bones. For registration, four self-drilling titanium screws were applied as fiducial markers. Multi-slice computed tomography (MSCT; 600 µm), conventional flat panel volume computed tomography (fpVCT; 466 µm), micro-fpVCT (197 µm) and secondary reconstructed fpVCT (100 µM) scans were performed and data were loaded into the navigation system. The resulting fiducial registration error (FRE) was analysed, and control of the navigation accuracy was performed. The registration process was very quick and reliable with the screws as fiducials. Compared to using the MSCT data, the micro-fpVCT data led to significantly lower FRE values, whereas conventional fpVCT and secondary reconstructed fpVCT data had no advantage in terms of accuracy. For all imaging modalities, there was no relevant visual deviation when targeting defined anatomical points with a navigation probe. fpVCT data are very well suited for electromagnetic navigation at the lateral skull base. The use of titanium screws as fiducial markers turned out to be ideal for comparing different imaging methods. A further evaluation of this approach by a clinical trial is required.
KW  - electromagnetic navigation
KW  - fpVCT
KW  - fiducial registration error
KW  - lateral skull base
KW  - otology
KW  - cochlear implantation
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-250268
SN  - 2047-7163
VL  - 104
IS  - 3
ER  -