Effectiveness of MRI and its correlation with EEG in patients with seizures
Journal Title: Medpulse International Journal of Radiology - Year 2019, Vol 9, Issue 2
Abstract
Background: A seizure is defined as an abnormal neurological disorder characterized by alteration in neurologic function due to excessive electrical discharge from the central nervous system. The aim of the study is to assess the changes in Magnetic Resonance Imaging (MRI) brain in patients presenting with seizures. This study is to determine the correlation between Electroencephalogram (EEG) findings and MRI abnormalities in patients presented with seizures. Materials and Methods: It is a cross sectional, non-interventional, observational retrospective study in which clinical records and imaging studies of patients, who referred to the Department of radiology, L. G. Hospital, Maninagar, Ahmedabad for MRI examination and EEG of the brain between January 2017 to December 2018 were analyzed retrospectively. Observations and Results: Out of 300 patients presented with seizures, 230 (76.6 %) patients were show abnormality in MRI Brain. Etiology according to MRI, in descending order are idiopathic (36.6 %) followed by infections (13.67 %), hippocampal pathology (11.6 %), cortical malformations (4.3%), abnormal white matter hyper intensities (6.66 %), tumors (0.67%) and AVM (3.67%). EEG can identified seizure onset area including hippocampal atrophy, cortical malformation, certain tumors anddual pathology. There were 260 patients (86.67%) with an abnormality on both MRI and EEG. So, abnormal MRI and EEG were concordant in 86% of subjects in this study. There were 40 patients (13.33%) in which both MRI and EEG were normal. The sensitivity (95% Confidence Interval) for MRI is 88.24% and EEG is 66.25%. Conclusion: EEG is the preferable investigation for identification and localization of the seizures onset area. However, MRI offers the potential for precise localization of epileptogenic focus. EEG results are not good indicators as compared to MRI for diagnosis of structural causes of seizures.
Authors and Affiliations
Amisha G Patel, Kavita U Vaishnav
Keywords
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- EP ID EP539499
- DOI 10.26611/1013928
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