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Temporal boneanatomy
1. Temporal Bone
Normal Anatomy
Computed Tomography /Histology Correlation
Otopathology Laboratory
Department of Radiology
Massachusetts Eye and Ear
Otopathologylaboratory.org
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Cochlea
Vestibule
Semicircular
canal
Introduction
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5. Labelled CT
IAC
Attic
Axial CT Histo
Axial Histo
Coronal CT Histo
Axial CT Coronal CT Coronal Histo
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45. Eric F. Curtin
Barbara J. Burgess
Dianne D. Jones
Jennifer T. O’Malley
Hugh D. Curtin MD
Otopathology Laboratory
Department of Radiology
Massachusetts Eye and Ear
Otopathologylaboratory.org
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Editor's Notes
Level 1 axial shows the facial nerve (VII) leaving the IAC reaching the genu (red arrow). Note the vestibule, lateral semicircular canal. Attic is at the upper part of the middle ear and the upper ossicles are coming into view.
Level 2 the facial nerve (arrows) crosses the middle ear. Malleus (M) and Incus (I) in the attic
Level 3 the facial nerve (arrow) is now seen in cross section as it has turned into the mastoid segment. Stapes (S), note the small septations in the cochlea
Level 3 the facial nerve (arrow) is now seen in cross section as it has turned into the mastoid segment. Stapes (S), note the small septations in the cochlea
Level 3 the facial nerve (arrow) is now seen in cross section as it has turned into the mastoid segment. Stapes (S), note the small septations in the cochlea
Level 4 is at the level of the round window (RW). the facial nerve (arrow) . All three turns of the cochlea are visible. The middle ear (ME) is well aerated.
Level 5 is at the level of the carotid plate and the jugular plate. They should be checked on every case. the facial nerve (arrow) . TMJ
Section 3, posterior to 2. Level of the oval window. This is a key section. The facial nerve (red arrow) passes just above the oval window and below the lateral semicircular canal
