Magnetic Resonance Imaging of the Temporal Bone in Children

1988 ◽  
pp. 164-168
Author(s):  
S. Louryan ◽  
C. Christophe ◽  
P. Haesendonck ◽  
M. Lemort ◽  
G. Rodesch ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Temporal Bone ◽  
Resonance Imaging

Bony cochlear nerve canal and internal auditory canal measures predict cochlear nerve status

2017 ◽  
Vol 131 (8) ◽  
pp. 676-683 ◽  
Author(s):  
E Tahir ◽  
M D Bajin ◽  
G Atay ◽  
B Ö Mocan ◽  
L Sennaroğlu
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Temporal Bone ◽  
Internal Auditory Canal ◽  
Cochlear Nerve ◽  
Resonance Imaging ◽  
Canal Stenosis ◽  
Canal Diameter ◽  
Canal Atresia

AbstractObjectives:The bony cochlear nerve canal is the space between the fundus of the internal auditory canal and the base of the cochlear modiolus that carries cochlear nerve fibres. This study aimed to determine the distribution of bony labyrinth anomalies and cochlear nerve anomalies in patients with bony cochlear nerve canal and internal auditory canal atresia and stenosis, and then to compare the diameter of the bony cochlear nerve canal and internal auditory canal with cochlear nerve status.Methods:The study included 38 sensorineural hearing loss patients (59 ears) in whom the bony cochlear nerve canal diameter at the mid-modiolus was 1.5 mm or less. Atretic and stenotic bony cochlear nerve canals were examined separately, and internal auditory canals with a mid-point diameter of less than 2 mm were considered stenotic. Temporal bone computed tomography and magnetic resonance imaging scans were reviewed to determine cochlear nerve status.Results:Cochlear hypoplasia was noted in 44 out of 59 ears (75 per cent) with a bony cochlear nerve canal diameter at the mid-modiolus of 1.5 mm or less. Approximately 33 per cent of ears with bony cochlear nerve canal stenosis also had a stenotic internal auditory canal and 84 per cent had a hypoplastic or aplastic cochlear nerve. All patients with bony cochlear nerve canal atresia had cochlear nerve deficiency. The cochlear nerve was hypoplastic or aplastic when the diameter of the bony cochlear nerve canal was less than 1.5 mm and the diameter of the internal auditory canal was less than 2 mm.Conclusion:The cochlear nerve may be aplastic or hypoplastic even if temporal bone computed tomography findings indicate a normal cochlea. If possible, patients scheduled to receive a cochlear implant should undergo both computed tomography and magnetic resonance imaging of the temporal bone. The bony cochlear nerve canal and internal auditory canal are complementary structures, and both should be assessed to determine cochlear nerve status.

Magnetic Resonance Imaging of the Facial Nerve

1989 ◽  
Vol 101 (3) ◽  
pp. 295-301 ◽  
Author(s):  
Donald G. Wortham ◽  
Louis M. Teresi ◽  
Robert B. Lufkin ◽  
William N. Hanafee ◽  
Paul H. Ward
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Facial Nerve ◽  
Temporal Bone ◽  
Resonance Imaging ◽  
Mr Images ◽  
Beam Hardening ◽  
Parotid Tumors ◽  
Seventh Nerve ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI) of the facial nerve was evaluated by studying normal volunteers and patients with diseases of the facial nerve with a 0.3 Tesla permanent-magnet MRI system with special surface colls. The normal MR images were correlated with the anatomy of thin cryosection specimens of fresh cadavers. The seventh nerve was followed from its nucleus in the brainstem through the temporal bone to the parotid gland bed. The entire labyrinth and tympanic portions, as well as the geniculate ganglion, could be shown with appropriate scan planes. Examples of brainstem diseases affecting the facial nerve and nucleus, facial neuromas, parotid tumors involving the facial nerve, and other diseases were studied. MRI is a technique that allows unique evaluation of the entire course of the facial nerve. It produces superior Images of the facial nerve with high-contrast resolution. Unlike computed tomography, there is no beam-hardening artifact from the temporal bone or exposure to ionizing radiation and contrast agents. MRI also allows visualization of the main trunks of the facial nerve in the parotid bed not possible with any other imaging technique.

Magnetic Resonance Imaging of the Normal Temporal Bone

2000 ◽  
Vol 11 (1) ◽  
pp. 2-9 ◽  
Author(s):  
Ethel Villanueva Sabnis ◽  
Mahmood F. Mafee ◽  
Richard Chen ◽  
Noam Alperin
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Temporal Bone ◽  
Resonance Imaging

Gadolinium-Enhanced Magnetic Resonance Imaging in Temporal Bone Lesions

1989 ◽  
Vol 99 (3) ◽  
pp. 257???260 ◽  
Author(s):  
Steven J. Millen ◽  
David L. Daniels ◽  
Glenn A. Meyer
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Temporal Bone ◽  
Bone Lesions ◽  
Resonance Imaging

The role of computed and magnetic resonance imaging in assessment of the local advancement of malignant tumors of the hearing organ

2021 ◽  
Vol 11 (2) ◽  
pp. 10-17
Author(s):  
E. G. Khazarova ◽  
E. L. Dronova
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Skin Cancer ◽  
Temporal Bone ◽  
Surgical Intervention ◽  
Malignant Tumors ◽  
Locally Advanced ◽  
Resonance Imaging ◽  
Hearing Organ ◽  
Ct And Mri

Introduction. Сomputed tomography (СТ) and magnetic resonance imaging (MRI) are the main methods of radiological diagnostics, which makes it possible to objectively assess the local advancement of malignant tumors of the hearing organ and decide on the possibility of surgical intervention.The objective of this scientific research – to determine the main indications for surgical intervention, taking into account the radiological criteria for the lesion of the temporal bone (CT, MRI) in locally advanced outer ear skin cancer. Materials and methods. This research work based on a retrospective and prospective analysis case history for patients with locally advanced external ear skin cancer. These are 45 patients, who received treatment in surgical department of head and neck tumors in N. N. Blokhin National Medical Research Center of Oncology between 1994 and 2020. Patient observation time averaged 30.0 ± 32.3 months (from 0.7 to 117.4 months, median – 12.0 months).Results. The prevalence of the tumor process in cancer of the skin of the external auditory canal in accordance with the staging system for lesions of the temporal bone structures (University of Pittsburgh, 1990), which takes into account CT and MRI signs of damage to the temporal bone and adjacent anatomical structures, is a factor that significantly affects the long-term results of treatment (for disease-free survival: hazard ratio (HR) 4.76, 95 % confidence interval (CI) 1.93–11.73, р = 0.00069; for tumor-specific survival: HR 4.25, 95 % CI 1.74–10.39, р = 0.0015; for overall survival: HR 1.96, 95 % CI 1.07–3.58, р = 0.029).Conclusion. CT and MRI are mandatory methods of radiological diagnosis of patients with skin cancer of the external auditory canal.

Giant cell reparative granuloma of the temporal bone successfully resected with preservation of hearing

2013 ◽  
Vol 127 (7) ◽  
pp. 716-720 ◽  
Author(s):  
Y Takata ◽  
H Hidaka ◽  
K Ishida ◽  
T Kobayashi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Giant Cell ◽  
Temporal Bone ◽  
Hearing Preservation ◽  
Resonance Imaging ◽  
Giant Cell Reparative Granuloma ◽  
Total Resection ◽  
History Of

AbstractObjective:To describe a case of giant cell reparative granuloma of the temporal bone which extended into the middle-ear cavity, and which was successfully treated surgically via a transmastoid approach, with hearing preservation.Case:A 37-year-old man presented with a one-year history of right-sided hearing loss, complicated by a three-month history of otalgia and a sensation of aural fullness. Computed tomography and magnetic resonance imaging demonstrated an osteolytic tumour lesion in the right temporal bone. The diagnosis was confirmed by biopsy from the mastoid lesion.Investigation and intervention:Pure-tone audiometry, computed tomography and magnetic resonance imaging were conducted, followed by total resection.Result:The giant cell reparative granuloma of the temporal bone was completely resected, with preservation of hearing.Conclusion:Although this patient's giant cell reparative granuloma of the temporal bone extended into the middle-ear cavity, total resection was achieved, with preservation of hearing. To the best of our knowledge, hearing preservation following resection of giant cell reparative granuloma of the temporal bone has not previously been reported.

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