internal auditory canal
T2 weighted MR characteristics of internal auditory canal masses
... the internal auditory canal are hypointense relative to cerebrospinal fluid, and therefore visible, on fast spin-echo T2-weighted MR ...the internal auditory canal, identified ...
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The evolving MR appearance of structures in the internal auditory canal after removal of an acoustic neuroma
... the internal auditory canal (IAC) on MR studies after removal of an acoustic neuroma, including changes in those patterns with time; to evaluate signal and enhancement of the labyrinth; to ...
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Anatomy of the facial and vestibulocochlear nerves in the internal auditory canal
... the internal auditory canal have concentrated on axial and coronal sequences and have led to the suppo- sition that the facial, cochlear, superior vestib- ular, and inferior vestibular nerves are ...
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Prevalence of Internal Auditory Canal Diverticulum and Its Association with Hearing Loss and Otosclerosis
... IAC diverticula are focal CSF attenuation outpouchings at the anterolateral internal auditory canal, present on 5% of CT exam- inations of the temporal bone in our study population. IAC di- verticula ...
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The relationship between the dimensions of the internal auditory canal and the anomalies of the vestibulocochlear nerve
... the internal auditory canal showing the facial (F) nerve and hypoplastic subdivisions of the vestibulocochlear nerve; superior division of the vestibular (Vs), inferior division of the vestibular ...
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MR Imaging of Cerebellopontine Angle and Internal Auditory Canal Lesions at 1 5 T
... A and B, T1-weighted coronal A and axial B images show small internal auditory canal tumor large sfraight arrows, slightly hypointense relative to normal pons P, displacing lower-signal [r] ...
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Isolated Internal Auditory Canal Diverticula: A Normal Anatomic Variant Not Associated with Sensorineural Hearing Loss
... This final group of 22 patients with isolated unilateral IAC diverticula and complete audiometric data for both ears provided 22 IAC diverticula and 22 nondiverticula internal controls. A comparison of hearing in ...
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Neoplasms of the Internal Auditory Canal
... Physical examination showed a positive Romberg to the left, ataxia, diplopia, left facial anesthesia, no spontaneous nystagrnus , a greatly decreased left caloric exam, [r] ...
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Topographical relationship of the facial and vestibulocochlear nerves in the subarachnoid space and internal auditory canal
... The facial nerve is a round structure located ante- rior to the vestibulocochlear nerve. Moving laterally in the IAC, it courses anterosuperior to the vestibu- locochlear nerve until it leaves the canal. The cross ...
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Optimizing MR imaging for detecting small tumors in the cerebellopontine angle and internal auditory canal
... The relative resolving power in patients exceeded theoretical calculations because of greater than expected image contrast caused by low CSF signal intensity secondary to CSF pulsation..[r] ...
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Cerebellar Abscess Caused by Extension of an Otogenic Infection Through the Labyrinth and Internal Auditory Canal
... Axial CT image showing opacification of the right mastoid process (M) and middle 91. ear (ME), extensive boney erosion of the ossicular chain, Fallopian canal (F), cochlea[r] ...
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Dumbbell Schwannomas of the Internal Auditory Canal
... Dumbbell schwannomas may extend from the confines of the IAC into the various segments of the labyrinth or facial nerve canal. It is critical to recognize extension of IAC schwannomas into the modiolus ...
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Diagnostic Accuracy of Screening MR Imaging Using Unenhanced Axial CISS and Coronal T2WI for Detection of Small Internal Auditory Canal Lesions
... Five of those studies reported the number of lesions measuring ⱕ10 mm.6,11-14 Of the 5, 2 had 100% sensitivity using axial 2D fast spin-echo T2WI alone and axial 3D fast asymmetric spin-[r] ...
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MR of the normal and abnormal internal auditory canal
... The myelinated intracanalicular portion of the acoustic and facial nerves are seen best on the T1-weighted images; however, the appearance of the nerves varies with the plane of section [r] ...
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Visualization of Human Inner Ear Anatomy with High Resolution MR Imaging at 7T: Initial Clinical Assessment
... the internal auditory canal, smaller nerve branches such as the superior ampullary nerve and the intermediate nerve were, in general, better depicted at ...The internal auditory ...
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High resolution CT of the temporal bone in dysplasia of the auricle and external auditory canal
... external auditory canal: stenosis or atre- sia of the cartilaginous part of the auditory canal, stenosis or atresia of the bony part, thickness of the atresia plate (smallest dimension at the ...
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Osteoma of Temporal Bone—A Rare Case Report
... external auditory canal (the most common site), squama, mastoid, middle ear, glenoid fossa, eustachian tube, internal auditory canal, petrous apex and styloid process have been reported ...
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Original Article Functional magnetic resonance imaging evidence in patients with sudden sensorineural hearing loss
... the internal auditory canal, inner ear hemorrhage [7, 8], cerebral infarction [9], inner ear inflammation, and malformation of the cochlea and vestibule can also lead to SSN- ...
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Absent Semicircular Canals in CHARGE Syndrome: Radiologic Spectrum of Findings
... isolated vestibule was present. Cochlear anomalies were related to presence and size of the basal and apical turns. Cochlear aperture was also recorded as normal if patent, visible on an MR when available, or trapped if ...
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Correlation of HRCT mastoid with clinical presentation and operative findings in ear diseases
... external auditory canal, excessive inclination of the external and internal auditory canals, dysplasia of the middle ear cavity and ...of internal auditory ...of internal ...
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