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Updated: Jan 27, 2026

Extracting the Cochlea from a Human Temporal Bone: A Cadaveric Protocol
Published on: August 18, 2023
Detectability of minute temporal bone structures with ultra-high resolution CT
Harukazu Hiraumi1, Makiko Obara2, Kunihiro Yoshioka3
1Department of Otolaryngology, Head and Neck Surgery, Iwate Medical University, Morioka, Iwate, Japan.
Objective:
Computed 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 Methods:
The 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.
Results:
Minute 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.
Conclusion:
Ultra-high resolution CT provides good visualization of small temporal bone structures in normal subjects.
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