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Multi-modal imaging in epilepsy: SPECT and PET.

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JBR-BTR : Organe De La Societe Royale Belge De Radiologie (SRBR) = Orgaan Van De Koninklijke Belgische Vereniging Voor Radiologie (KBVR)
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Single-photon emission computed tomography (SPECT) and positron emission tomography (PET) are crucial for epilepsy surgery evaluation. These imaging techniques help pinpoint seizure origins and identify damaged brain areas, aiding surgical planning.

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Area of Science:

  • Neurology
  • Radiology
  • Epileptology

Background:

  • Refractory epilepsy requires precise localization of the epileptic focus for effective surgical treatment.
  • Neuroimaging plays a vital role in presurgical evaluation, complementing clinical and electroencephalographic data.

Purpose of the Study:

  • To elucidate the complementary roles of SPECT and PET in the presurgical evaluation of refractory epilepsy.
  • To highlight the utility of these modalities in localizing and characterizing the epileptic focus.

Main Methods:

  • Utilizing perfusion SPECT to identify the ictal onset zone (IOZ).
  • Employing PET to delineate the functional deficit zone (FDZ).
  • Correlating imaging findings with MRI and invasive EEG data.

Main Results:

  • SPECT effectively identifies the IOZ, indicating the seizure's origin.
  • PET accurately delineates the FDZ, representing areas of functional impairment.
  • Both SPECT and PET aid in localizing and characterizing the epileptic focus, guiding invasive EEG placement.

Conclusions:

  • SPECT and PET offer complementary information crucial for presurgical planning in refractory epilepsy.
  • These imaging modalities enhance the detection of subtle lesions and improve the guidance of invasive EEG procedures.