TY  - JOUR
A1  - Noyalet, Laurent
A1  - Ilgen, Lukas
A1  - Bürklein, Miriam
A1  - Shehata-Dieler, Wafaa
A1  - Taeger, Johannes
A1  - Hagen, Rudolf
A1  - Neun, Tilmann
A1  - Zabler, Simon
A1  - Althoff, Daniel
A1  - Rak, Kristen
T1  - Vestibular aqueduct morphology and Meniere’s disease - development of the vestibular aqueduct score by 3D analysis
JF  - Frontiers in Surgery
N2  - Improved radiological examinations with newly developed 3D models may increase understanding of Meniere's disease (MD). The morphology and course of the vestibular aqueduct (VA) in the temporal bone might be related to the severity of MD. The presented study explored, if the VA of MD and non-MD patients can be grouped relative to its angle to the semicircular canals (SCC) and length using a 3D model. Scans of temporal bone specimens (TBS) were performed using micro-CT and micro flat panel volume computed tomography (mfpVCT). Furthermore, scans were carried out in patients and TBS by computed tomography (CT). The angle between the VA and the three SCC, as well as the length of the VA were measured. From these data, a 3D model was constructed to develop the vestibular aqueduct score (VAS). Using different imaging modalities it was demonstrated that angle measurements of the VA are reliable and can be effectively used for detailed diagnostic investigation. To test the clinical relevance, the VAS was applied on MD and on non-MD patients. Length and angle values from MD patients differed from non-MD patients. In MD patients, significantly higher numbers of VAs could be assigned to a distinct group of the VAS. In addition, it was tested, whether the outcome of a treatment option for MD can be correlated to the VAS.
KW  - vestibular aqueduct (VA)
KW  - 3D analysis
KW  - temporal bone
KW  - saccotomy
KW  - computed tomography
KW  - Meniere’s disease
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-312893
SN  - 2296-875X
VL  - 9
ER  - 
TY  - JOUR
A1  - Müller-Graff, Franz-Tassilo
A1  - Ilgen, Lukas
A1  - Schendzielorz, Philipp
A1  - Voelker, Johannes
A1  - Taeger, Johannes
A1  - Kurz, Anja
A1  - Hagen, Rudolf
A1  - Neun, Tilmann
A1  - Rak, Kristen
T1  - Implementation of secondary reconstructions of flat-panel volume computed tomography (fpVCT) and otological planning software for anatomically based cochlear implantation
JF  - European Archives of Oto-Rhino-Laryngology
N2  - Purpose
For further improvements in cochlear implantation, the measurement of the cochlear duct length (CDL) and the determination of the electrode contact position (ECP) are increasingly in the focus of clinical research. Usually, these items were investigated by multislice computed tomography (MSCT). The determination of ECP was only possible by research programs so far. Flat-panel volume computed tomography (fpVCT) and its secondary reconstructions (fpVCT\(_{SECO}\)) allow for high spatial resolution for the visualization of the temporal bone structures. Using a newly developed surgical planning software that enables the evaluation of CDL and the determination of postoperative ECP, this study aimed to investigate the combination of fpVCT and otological planning software to improve the implementation of an anatomically based cochlear implantation.
Methods
Cochlear measurements were performed utilizing surgical planning software in imaging data (MSCT, fpVCT and fpVCT\(_{SECO}\)) of patients with and without implanted electrodes.
Results
Measurement of the CDL by the use of an otological planning software was highly reliable using fpVCT\(_{SECO}\) with a lower variance between the respective measurements compared to MSCT. The determination of the inter-electrode-distance (IED) between the ECP was improved in fpVCT\(_{SECO}\) compared to MSCT.
Conclusion
The combination of fpVCT\(_{SECO}\) and otological planning software permits a simplified and more reliable analysis of the cochlea in the pre- and postoperative setting. The combination of both systems will enable further progress in the development of an anatomically based cochlear implantation.
KW  - interelectrode-distance
KW  - Cochlear duct length
KW  - Cochlear planning software
KW  - fpVCT
KW  - secondary reconstruction
KW  - MSCT
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-266798
SN  - 1434-4726
VL  - 279
IS  - 5
ER  -