Magnetic Resonance Imaging (1.5 Tesla) in Patients With Intractable Focal Seizures

Authors:
  • RLRonald P. Lesser
    Ronald P. Lesser
  • MMMichael T. Modic
    Michael T. Modic
  • MWMeredith A. Weinstein
    Meredith A. Weinstein
  • PDPaul M. Duchesneau
    Paul M. Duchesneau
  • HLHans Lüders
    Hans Lüders
  • DDDudley S. Dinner
    Dudley S. Dinner
  • HMHarold H. Morris
    Harold H. Morris
  • MEMelinda Estes
    Melinda Estes
  • SCSamuel M. Chou
    Samuel M. Chou
  • JHJoseph F. Hahn
    Joseph F. Hahn
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Abstract
• Magnetic resonance (MR) (1.5 tesla) studies were performed in ten patients with temporal lobe epilepsy and two with temporofrontal epilepsy. Two patients with temporal lobe epilepsy and one with temporofrontal epilepsy exhibited areas of increased signal intensity on T2-weighted images in the mesiobasal portion of the temporal lobe shown by electroencephalography to be the epileptogenic focus; no analogous abnormalities had been found in these patients on computed tomographic scans. Pathologic studies have not revealed a specific ultrastructural correlate for the MR findings in this group of patients. We found MR to be a useful, noninvasive diagnostic adjunct in the presurgical assessment of some patients with temporal lobe epilepsy. Where abnormalities were found, they corresponded with the epileptogenic focus as defined by electroencephalography.

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