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Photon-Counting Detector CT Virtual Monoengergetic Images for Cochlear Implant Visualization—A Head to Head Comparison to Energy-Integrating Detector CT

1
Department of Diagnostic and Interventional Radiology and Neuroradiology, Bundeswehr Central Hospital Koblenz, Rübenacher Straße 170, 56072 Koblenz, Germany
2
Institute of Neuroradiology, University Medical Centre, Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany
3
Department of Radiology and Nuclear Medicine, University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1–3, 68167 Mannheim, Germany
4
Bundeswehr Institute of Radiobiology, Neuherbergstraße 11, 80937 München, Germany
5
Institute of Anatomy, University Medical Center, Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
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Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, 60590 Frankfurt am Main, Germany
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Department of ENT Surgery, Bundeswehr Central Hospital Koblenz, Rübenacher Straße 170, 56072 Koblenz, Germany
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Jasper Nijkamp
Tomography 2022, 8(4), 1642-1648; https://doi.org/10.3390/tomography8040136
Received: 12 April 2022 / Revised: 7 June 2022 / Accepted: 18 June 2022 / Published: 21 June 2022
(This article belongs to the Section Neuroimaging)
Cochlear implants (CIs) are the primary treatment method in patients with profound sensorineural hearing loss. Interpretation of postoperative imaging with conventional energy-integrating detector computed tomography (EID-CT) following CI surgery remains challenging due to metal artifacts. Still, the photon-counting detector (PCD-CT) is a new emerging technology with the potential to eliminate these problems. This study evaluated the performance of virtual monoenergetic (VME) EID-CT images versus PCD-CT in CI imaging. In this cadaveric study, two temporal bone specimens with implanted CIs were scanned with EID-CT and PCD-CT. The images were assessed according to the visibility of interelectrode wire, size of electrode contact, and diameter of halo artifacts. The visibility of interelectrode wire sections was significantly higher when reviewing PCD-CT images. The difference in diameter measurements for electrode contacts between the two CT scanner modalities showed that the PCD-CT technology generally led to significantly larger diameter readings. The larger measurements were closer to the manufacturer’s specifications for the CI electrode. The size of halo artifacts surrounding the electrode contacts did not differ significantly between the two imaging modalities. PCT-CT imaging is a promising technology for CI imaging with improved spatial resolution and better visibility of small structures than conventional EID-CT. View Full-Text
Keywords: cochlear implant; spatial resolution; high-resolution computed tomography; metal artifacts; virtual monoenergetic imaging; photon-counting detector CT; energy-integrating detector CT; cadaver study cochlear implant; spatial resolution; high-resolution computed tomography; metal artifacts; virtual monoenergetic imaging; photon-counting detector CT; energy-integrating detector CT; cadaver study
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MDPI and ACS Style

Waldeck, S.; Overhoff, D.; Alizadeh, L.; Becker, B.V.; Port, M.; Froelich, M.F.; Brockmann, M.A.; Schumann, S.; Vogl, T.J.; Schoenberg, S.O.; Schmidt, S. Photon-Counting Detector CT Virtual Monoengergetic Images for Cochlear Implant Visualization—A Head to Head Comparison to Energy-Integrating Detector CT. Tomography 2022, 8, 1642-1648. https://doi.org/10.3390/tomography8040136

AMA Style

Waldeck S, Overhoff D, Alizadeh L, Becker BV, Port M, Froelich MF, Brockmann MA, Schumann S, Vogl TJ, Schoenberg SO, Schmidt S. Photon-Counting Detector CT Virtual Monoengergetic Images for Cochlear Implant Visualization—A Head to Head Comparison to Energy-Integrating Detector CT. Tomography. 2022; 8(4):1642-1648. https://doi.org/10.3390/tomography8040136

Chicago/Turabian Style

Waldeck, Stephan, Daniel Overhoff, Leona Alizadeh, Benjamin V. Becker, Matthias Port, Matthias F. Froelich, Marc A. Brockmann, Sven Schumann, Thomas J. Vogl, Stefan O. Schoenberg, and Sandra Schmidt. 2022. "Photon-Counting Detector CT Virtual Monoengergetic Images for Cochlear Implant Visualization—A Head to Head Comparison to Energy-Integrating Detector CT" Tomography 8, no. 4: 1642-1648. https://doi.org/10.3390/tomography8040136

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