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Imaging of the ear – X ray of the temporal bone,Schuller's projection
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Imaging of the ear – X ray of the temporal bone,Schuller's projection
● 1. Auricula● 2. Cellulae squamosae● 3. Angulus Citelli● 4. Cellulae periantralis● 5. Sulcus sinus sigmoidei● 6. Margo anterior partis petrosae● 7. Antrum mastoideum● 8. Fossa mandibularis, Facies articularis● 9. Cellulae marginalis● 10. Mandibula, Processus condylaris● 11. Os temporale, Processus zygomaticus● 12. Tuberculum articulare● 13. Cellulae retrofacialis● 14. Meatus acusticus internus et externus● 15. Apex partis petrosae● 16. Processus mastoideus, Cellulae
mastoideae● 17. Processus styloideus
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X ray of the temporal boneStenvers' projection
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X ray of the temporal boneStenvers' projection
● 1. Sutura sphenosquamosa● 2. Protuberantia occipitalis interna● 3. Crista occipitalis interna● 4. Fossa subarcuata● 5. Eminentia arcuata● 6. Tegmen tympani● 7. Apex partis petrosae● 8. Canalis semicircularis anterior● 9. Meatus acusticus internus● 10. Antrum mastoideum● 11. Fissura sphenopetrosa● 12. Vestibulum● 13. Cochlea● 14. Canalis semicircularis lateralis● 15. Cavitas tympanica● 16. Mandibula, Processus condylaris
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CT of the temporal bone – tympanic membrane
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Superior semicircular canal
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Malleus, incus, articulation
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Lateral semicircular canal
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The cochlea
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Posterior semicircular canal
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The vestibule, cochlea, Fallopian canal, ossicules
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Basal turn of the cochlea, round window
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Magnetic resonance imaging
● T1-weighted MRI after i.v. contrast shows left-sided mastoiditis and subtotal, thrombotic occlusion of the transverse and sigmoid sinus (*)
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Schwannoma = acoustic schwannoma
● In the internal ear canal ● in the ponto-cerebellar angle
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Schwannoma
● Big schwannoma with symptoms of pressure of the cerebelllum and 4th ventricle
● Single side● Both sides in
neurofibromatosis-2 (both sides schwannomas, cafe-au-lait stains on the skin, meningiomas)
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Schwannoma
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Hearing prosthesis and auditory rehabilitation
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PORP, TORP
● Partial ossicular replacement prosthesis (short columella)● Total ossicular replacement prosthesis (long columella)
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PORP, TORP
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Hearing aid (HA)
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Cochlear implant
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Auditory brainstem implant
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Electrodes
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Middle ear implant (MEI)
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MEI Medel