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Published online before print April 10, 2002, 10.1148/radiol.2233010360
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(Radiology 2002;223:860-869.)
© RSNA, 2002

Technical Developments

Focal Epileptiform Activity in the Brain: Detection with Spike-related Functional MR Imaging—Preliminary Results1

Lorenz Jäger, MD, Konrad J. Werhahn, MD, Alexander Hoffmann, PhD, Sophia Berthold, Verena Scholz, MD, Jürgen Weber, PhD, Soheyl Noachtar, MD and Maximilian Reiser, MD

1 From the Institute of Clinical Radiology (L.J., A.H., S.B., V.S., J.W., M.R.) and Department of Neurology (K.J.W., S.N.), University of Munich, Klinikum Grosshadern, Marchioninistrasse 15, 81366 Munich, Germany. Received January 24, 2001; revision requested March 21; revision received September 7; accepted October 16. Address correspondence to L.J. (e-mail: jaeger@ikra.med.uni-muenchen.de).

The purpose of this study was to develop a spike-related functional magnetic resonance (MR) imaging method to detect epileptic brain activity. Correlations between simultaneous spike-related functional MR imaging and electroencephalographic (EEG) recordings were performed in 10 patients with focal epilepsy. Postprocessing techniques were implemented to eliminate contamination of the EEG recording from ballistocardiography and the echo-planar MR imaging sequence. A diagnostic EEG recording was achieved during functional MR imaging. Spike location correlated with the site of blood oxygen level–dependent signal increase. Spike-related functional MR imaging is a promising technique for detecting focal epileptic brain activity.

© RSNA, 2002

Index terms: Brain, MR, 134.121412 • Electroencephalography (EEG), 13.1299 • Epilepsy • Magnetic resonance (MR), functional imaging




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