Evaluation of magnetic resonance imaging(MRI) in diagnosis of acoustic neuroma. Comparative study with plain X-ray and CTS
| Autor: | Junichi Matsukawa, Makoto Sakai, Atsushi Shinkawa, Kimihisa Nomura, Hirosato Miyake |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
Adult
Male medicine.medical_specialty Acoustic neuroma chemistry.chemical_compound Metrizamide otorhinolaryngologic diseases Humans Medicine medicine.diagnostic_test business.industry Cranial nerves Magnetic resonance imaging Neuroma Acoustic Middle Aged Neurovascular bundle medicine.disease Cerebellopontine angle Magnetic Resonance Imaging Contrast medium Otorhinolaryngology chemistry Female sense organs Radiology Differential diagnosis Tomography X-Ray Computed business Nuclear medicine |
| Zdroj: | Nippon Jibiinkoka Gakkai Kaiho. 90:1849-1855 |
| ISSN: | 1883-0854 0030-6622 |
| DOI: | 10.3950/jibiinkoka.90.1849 |
| Popis: | In order to find an approach to earlier and more acurate diagnosis of acoustic neuroma, a comparative evaluation of MRI, plain X-ray (Stenvers'projection), high resolution CT with or without Metrizamide enhancement and air-CT has been made in five clinical cases of acoustic neuroma. A paramagnetic contrast agent, Gadolinium-diethylenetriamine pentaacetic acid (GdDTPA), was used to enhance images resolution in two cases of acoustic neuroma. In MRI, the high singnal mass in the posterior fossa was smaller than 10×10mm in 2 cases, 17×20mm in 2 cases and 35×40mm in one case.MRI revealed enlargement of the neurovascular bundle around the VII and VIII cranial nerves compatible with a diagnosis of acoustic neuroma in all 5 cases, and masses within the cerebellopontine angle were also disclosed.In 2 cases the image of equivocal acoustic neuromas was well enhanced, and these lesions were visualized after intravenous administration of Gd-DTPA. In one of the cases the acoustic neuroma was satisfactorily differentiated from the surrounding cystic lesion with the aid of a contrast medium.Magnetic resonance which uses no ionizing radiation seems to be innocuous and offers several advantages over other imaging methods and CT, which may produce an adverse reaction when a contrast medium is used in CT-cisternography. Further advancement of MR technology will offer greater assistance in differential diagnosis of lesions such as acoustic tumors or other cerebellopontine angle tumors. |
| Databáze: | OpenAIRE |
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