Held, Paul and Fellner, Claudia and Seitz, Johannes and Graf, Simone and Fellner, Franz and Strutz, Jürgen (1999) The value of T2(*)-weighted MR images for the diagnosis of acoustic neuromas. EUROPEAN JOURNAL OF RADIOLOGY, 30 (3). pp. 237-244. ISSN 0720-048X, 1872-7727
Full text not available from this repository.Abstract
The aim of this study was to evaluate high resolution T2(*)-weighted MRI-in our case a 3D CISS sequence-for the diagnosis of acoustic neuromas. Especially to be clarified was if high-resolution T2-weighted sequences can substitute T1-weighted contrast-enhanced sequences, and in which circumstances they can give important additional information when compared with contrast-enhanced T1-weighted sequences. Methods and patients: The MR examinations were performed using a 1.5-Tesla unit with a circularly polarized head coil. All 20 patients (II females, nine males, aged from 12 to 80 years) with acoustic neuromas underwent preoperative MRI with T2*-weighted 3D CISS (slice thickness, 0.7 mm; acquisition time, 8 min) and pre- and postcontrast T1-weighted 3D MP-RAGE (slice thickness, 0.9 mm; acquisition time, 8 min) sequences. The detectability of acoustic neuromas was evaluated following the consensus of three radiologists using a 3D work station (parameters: tumor presence, extent, nerve attribution). Results: All tumors were detected by both contrast-enhanced 3D MP-RAGE and 3D CISS and the diameters of the lesions were equally well measured. 3D CISS was the best sequence for the attribution of a lesion to a certain nerve. Labyrinthine involvement could be better detected using 3D CISS than contrast-enhanced 3D MP-RAGE. Conclusion: High-resolution T2(*)-weighted MRI is a very sensitive method for tumor screening which can also detect even small meatal and labyrinthine neuromas. In the case of abnormal findings (other pathology or variations, e.g. vascular loops); however, contrast-enhanced T1-weighted MRI is necessary in order to confirm the presence of a tumor with typical enhancement. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BRAIN-STEM RESPONSE; INTERNAL AUDITORY MEATUS; 3D CISS SEQUENCES; CEREBELLOPONTINE ANGLE; INNER-EAR; MP-RAGE; GADOLINIUM; LESIONS; SCHWANNOMA; MRI; acoustic neuroma; 3D CISS; vestibulocochlear nerve |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Röntgendiagnostik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Feb 2023 09:38 |
| Last Modified: | 14 Feb 2023 09:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/49192 |
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