Middle Cerebral Artery (MCA) Susceptibility Sign at Susceptibility-based Perfusion MR Imaging: Clinical Importance and Comparison with Hyperdense MCA Sign at CT1
| Autor: | Sebastian Flacke, Alexander Hartmann, J Textor, Wolfgang Block, Frank Träber, Hans H. Schild, Juergen Gieseke, Ewald Keller, Paul J. M. Folkers, Horst Urbach |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
medicine.medical_specialty
medicine.diagnostic_test business.industry Infarction Magnetic resonance imaging medicine.disease Magnetic resonance angiography nervous system diseases medicine.artery Predictive value of tests Middle cerebral artery Angiography Medicine Radiology Nuclear Medicine and imaging cardiovascular diseases Radiology business Nuclear medicine Perfusion Stroke |
| Zdroj: | Radiology. 215:476-482 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/radiology.215.2.r00ma09476 |
| Popis: | PURPOSE: To describe the radiologic findings of susceptibility changes in acute middle cerebral artery (MCA) thromboembolism detected with three-dimensional (3D) susceptibility-based perfusion magnetic resonance (MR) imaging and to compare the detectability and clinical value of this sign with those of the hyperdense MCA sign at computed tomography (CT). MATERIALS AND METHODS: Twenty-three patients (mean age, 55 years) underwent CT and MR imaging within the first 6 hours after the onset of acute MCA stroke. The hyperdense MCA sign at CT and the presence of susceptibility changes in acute thromboembolism as depicted on T2*-weighted 3D perfusion MR images were assessed. The presence of each sign was correlated with clinical presentation. RESULTS: The sensitivity of the hyperdense MCA sign at CT was 54% (negative predictive value, 71%) compared with 82% (negative predictive value, 86%) for the susceptibility changes at MR imaging. There were no false-positive CT or MR readings. The presence of the MCA suscep... |
| Databáze: | OpenAIRE |
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