Detectability of minute temporal bone structures with ultra-high resolution CT |
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| Institution: | 1. Department of Otolaryngology, Head and Neck Surgery, Iwate Medical University, Morioka, Iwate, Japan;2. Department of Radiology, Iwate Medical University, Morioka, Iwate, Japan;3. Division of Cardiovascular Radiology, Department of Radiology, Iwate Medical University, Morioka, Japan;1. Department of Otolaryngology-Head & Neck Surgery, Kobe University, Graduate School of Medicine, Hyogo, Japan;2. Department of Anatomy, Kochi Medical School, Nankoku, Kochi, Japan;3. Department of Otolaryngology, Kochi Medical School, Nankoku, Kochi, Japan;1. Department of Otorhinolaryngology, Head and Neck Surgery, Tonami General Hospital, Tonami City, Toyama, Japan;2. Department of Otorhinolaryngology, Head and Neck Surgery, Kanazawa University, Kanazawa City, Ishikawa, Japan;3. Department of Otorhinolaryngology, Head and Neck Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan;1. Division of Head and Neck Surgery, Department of Otolaryngology, Stanford University School of Medicine, Stanford, CA 94305, USA;2. Program in Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA;3. Stanford Cancer Institute and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford CA 94305, USA;1. LSUHSC School of Medicine, New Orleans, LA, USA;2. Case Western Reserve University School of Medicine, Cleveland, Ohio, USA;3. New York Eye and Ear Infirmary of Mount Sinai, Department of Otolaryngology, 310 East 14th St. 6th Floor, New York, NY 10003, USA;1. Division of Thoracic Surgery, The Ottawa Hospital – General Campus, University of Ottawa, 501 Smyth Road, Ottawa, Ontario K1H 8L6, Canada;2. Laval University, Québec City, Québec G0A 3Z0, Canada;3. Department of Surgery, University of British Columbia, 2178 Pandosy Street, Kelowna, British Columbia V1W 1S8, Canada |
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| Abstract: | ObjectiveComputed tomography (CT) is the imaging tool of choice in the diagnosis of temporal bone lesions. With the recent progress in imaging technology, CT with higher spatial resolution (Ultra-high resolution CT) has become available in the clinical setting. The purpose of this study is to evaluate the visibility of small temporal bone structures using ultra-high resolution CT.Material and methodsThe visibility of 27 minute temporal bone structures on ultra-high resolution CT images was evaluated. Non-helical axial scans were performed in 18 normal hearing ears without previous otologic diseases. Visibility was scored by an experienced radiologist and otologist.ResultsMinute temporal bone structures including the ossicular chain, the crus of the stapes, the greater superficial petrosal nerve, and the anterior malleolar ligament were clearly visualized on ultra-high resolution CT. The stapedius muscle tendon and the chorda tympani exiting the posterior canaliculus and coursing medial to the malleus could be visualized.ConclusionUltra-high resolution CT provides good visualization of small temporal bone structures in normal subjects. |
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| Keywords: | Computed tomography Imaging Ossicle Chorda tympani |
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