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[EPI-FLAIR sequence in the evaluation of mesial temporal sclerosis]

M A Machado1, F Goyanna, A S Matos

  • 1Setor de Neurorradiologia, Serviço de Bioimagem, Hospital São Rafael--Monte Tabor, Salvador, Bahia. machado@e-net.com.br

Arquivos De Neuro-Psiquiatria
|June 13, 2001
PubMed

Insights

Medically intractable temporal lobe epilepsy patients show increased signal intensity in the hippocampus on FLAIR-EPI MRI sequences. This finding aids in diagnosing mesial temporal sclerosis, a common cause of epilepsy.

Area of Science:

  • Neurology
  • Radiology
  • Medical Imaging

Context:

  • Temporal lobe epilepsy (TLE) is a common neurological disorder.
  • Mesial temporal sclerosis (MTS) is a frequent cause of medically intractable TLE.
  • Accurate diagnosis of MTS is crucial for effective treatment planning.

Purpose:

  • To evaluate morphological and signal intensity changes in the hippocampus.
  • To compare different Magnetic Resonance Imaging (MRI) sequences for detecting these changes.
  • To assess the utility of FLAIR-EPI and STIR sequences in patients with medically intractable TLE and suspected MTS.

Summary:

  • Eight patients with medically intractable TLE and MTS underwent 1.5-T MRI.
  • Fluid Attenuation Inversion Recovery Echo Planar Imaging (FLAIR-EPI) sequences demonstrated increased signal intensity in the hippocampus, particularly in coronal views, compared to Spin Echo (SE) and Fast Spin Echo (FSE) sequences.
  • The Short Tau Inversion Recovery (STIR) sequence revealed cortical hippocampal atrophy in 50% of cases with signal abnormalities.

Impact:

  • FLAIR-EPI sequences show higher sensitivity for detecting hippocampal signal abnormalities in MTS.
  • MRI findings, especially on FLAIR-EPI, can aid in diagnosing MTS in patients with intractable TLE.
  • These findings may improve the diagnostic accuracy and subsequent management of patients with TLE.

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