| High-resolution magnetic resonance of the extracranial facial nerve and parotid duct: demonstration of the branches of the intraparotid facial nerve and its relation to parotid tumours by MRI with a surface coil. | |
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MedLine Citation:
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PMID: 15710138 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIM: To investigate the usefulness of high-resolution MR imaging in the evaluation of the extracranial facial nerve, compared with surgical findings. MATERIALS AND METHODS: Thirteen patients with benign parotid tumours were studied on a 1.5-T MR system with a 3 in circular surface coil. High-resolution T1-weighted spin-echo, T2-weighted fast spin-echo, and three-dimensional gradient-recalled acquisition in the steady state (GRASS) images were obtained in the axial planes. Oblique reformatted images were generated. Tumours, parotid ducts and facial nerves were identified on these images. The relationship of the tumours to the facial nerves was confirmed at surgery. RESULTS: Facial nerves appeared as linear structures of low intensity on all pulse sequences. The main trunks and cervicofacial and temporofacial divisions of the facial nerves were identified in 100%, 84.1% and 53.8% of GRASS images, respectively. Parotid ducts appeared as structures of low intensity on T1-weighted (66.6%) and GRASS images (81.8%), and as structures of very high intensity on T2-weighted images (91.7%). The relationships of the tumours to the facial nerves were correctly diagnosed in 11 (91.7%) of 12 cases. CONCLUSION: High-resolution MR imaging depicts the extracranial facial nerve and the parotid duct, and is useful for preoperative evaluation of parotid gland tumours. |
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Authors:
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N Takahashi; K Okamoto; M Ohkubo; M Kawana |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Clinical radiology Volume: 60 ISSN: 0009-9260 ISO Abbreviation: Clin Radiol Publication Date: 2005 Mar |
Date Detail:
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Created Date: 2005-02-15 Completed Date: 2005-05-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 1306016 Medline TA: Clin Radiol Country: England |
Other Details:
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Languages: eng Pagination: 349-54 Citation Subset: IM |
Affiliation:
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Department of Radiology, Niigata University Faculty of Medicine, Niigata, Japan. nandtr@hosp.niigata.niigata.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Facial Nerve / pathology* Female Humans Magnetic Resonance Imaging / instrumentation, methods* Male Middle Aged Parotid Diseases / diagnosis*, surgery Parotid Gland / pathology*, surgery Sensitivity and Specificity |
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