Stephan Waldeck1,2, Christian VON Falck3, Rene Chapot4, Marc Brockmann2, Daniel Overhoff5,6. 1. Department of Diagnostic and Interventional Radiology and Neuroradiology, Bundeswehr Central Hospital Koblenz, Koblenz, Germany; dr.waldeck@icloud.com. 2. Institute of Neuroradiology, University Medical Centre Johannes Gutenberg University Mainz, Mainz, Germany. 3. Institute of Diagnostic and Interventional Radiology, Hannover Medical School, Hanover, Germany. 4. Department of Neuroradiology, Alfried Krupp Krankenhaus, Essen, Germany. 5. Department of Diagnostic and Interventional Radiology and Neuroradiology, Bundeswehr Central Hospital Koblenz, Koblenz, Germany. 6. Department of Radiology and Nuclear Medicine, University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
Abstract
BACKGROUND: The aim of this study was to compare three different methods for measurement of cochlear duct length (CDL) in the clinical setting for two different imaging modalities, namely computed tomography (CT) and cone-beam computed tomography (CBCT). PATIENTS AND METHODS: One hundred temporal bone data sets (CT: n=50; CBCT: n=50) of non-malformed cochleae were retrospectively analyzed using three different CDL estimation techniques: 3D curved multiplanar reconstruction (cMPR), 2D cMPR and the A-value formula. RESULTS: The data sets belonged to 60 patients (34 males, 26 females; mean age=50.28±18.58 years). For both imaging modalities, application of the 3D cMPR estimation technique led to significantly greater mean CDL values than the two-dimensional methods (p<0.0083). The CDL measurements viewed in CT imaging software were significantly shorter than the corresponding CBCT measurements (p<0.05). Using a linear mixed model, differences in CDL by sex (p=0.796), age (p=0.377) and side of ear (p=0.690) were not significant. CONCLUSION: The 3D cMPR technique was found to provide the most accurate in vivo CDL measurement in non-malformed cochlea in both CT and CBCT imaging compared to 2D methods. The study results also suggest that the higher spatial resolution in CBCT imaging results in more precise CDL determination than in CT.
BACKGROUND: The aim of this study was to compare three different methods for measurement of cochlear duct length (CDL) in the clinical setting for two different imaging modalities, namely computed tomography (CT) and cone-beam computed tomography (CBCT). PATIENTS AND METHODS: One hundred temporal bone data sets (CT: n=50; CBCT: n=50) of non-malformed cochleae were retrospectively analyzed using three different CDL estimation techniques: 3D curved multiplanar reconstruction (cMPR), 2D cMPR and the A-value formula. RESULTS: The data sets belonged to 60 patients (34 males, 26 females; mean age=50.28±18.58 years). For both imaging modalities, application of the 3D cMPR estimation technique led to significantly greater mean CDL values than the two-dimensional methods (p<0.0083). The CDL measurements viewed in CT imaging software were significantly shorter than the corresponding CBCT measurements (p<0.05). Using a linear mixed model, differences in CDL by sex (p=0.796), age (p=0.377) and side of ear (p=0.690) were not significant. CONCLUSION: The 3D cMPR technique was found to provide the most accurate in vivo CDL measurement in non-malformed cochlea in both CT and CBCT imaging compared to 2D methods. The study results also suggest that the higher spatial resolution in CBCT imaging results in more precise CDL determination than in CT.
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Authors: Kayvan Nateghifard; David Low; Lola Awofala; Dilakshan Srikanthan; Jafri Kuthubutheen; Michael Daly; Harley Chan; Jonathan Irish; Joseph Chen; Vincent Lin; Trung Ngoc Le Journal: J Otolaryngol Head Neck Surg Date: 2019-11-21
Authors: Stephan Waldeck; Daniel Overhoff; Leona Alizadeh; Benjamin V Becker; Matthias Port; Matthias F Froelich; Marc A Brockmann; Sven Schumann; Thomas J Vogl; Stefan O Schoenberg; Sandra Schmidt Journal: Tomography Date: 2022-06-21