Statistical voxel-wise analysis of ictal SPECT reveals pattern of abnormal perfusion in patients with temporal lobe epilepsy

Arquivos de Neuro-Psiquiatria

Bárbara Juarez Amorim²  Elba Cristina Sá De Camargo Etchebehere²  Edwaldo Eduardo Camargo²  Pablo Augusto Rio¹  Leonardo Bonilha¹  Chris Rorden¹  Li Min Li²  Fernando Cendes² 

[1] ,UNICAMP FCM Department of Radiology

关键词: brain perfusion;    SPECT;    SPM;    seizures;    epilepsy;    Perfusão cerebral;    SPECT;    SPM;    crises epilépticas;    epilepsia;   

DOI  :  10.1590/S0004-282X2005000600014

来源: SciELO

【 摘 要 】

OBJECTIVE: To investigate the pattern of perfusion abnormalities in ictal and interictal brain perfusion SPECT images (BSI) from patients with temporal lobe epilepsy (TLE). METHOD: It was acquired interictal and ictal BSI from 24 patients with refractory TLE. BSIs were analyzed by visual inspection and statistical parametric mapping (SPM2). Statistical analysis compared the patients group to a control group of 50 volunteers. The images from patients with left-TLE were left-right flipped. RESULTS: It was not observed significant perfusional differences in interictal scans with SPM. Ictal BSI in SPM analysis revealed hyperperfusion within ipsilateral temporal lobe (epileptogenic focus) and also contralateral parieto-occipital region, ipsilateral posterior cingulate gyrus, occipital lobes and ipsilateral basal ganglia. Ictal BSI also showed areas of hypoperfusion. CONCLUSION: In a group analysis of ictal BSI of patients with TLE, voxel-wise analysis detects a network of distant regions of perfusional alteration which may play active role in seizure genesis and propagation.

【 授权许可】

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