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[CAT and MRI in the study of partial epilepsy: comparison of the 2 methods and correlations with EEG]
M Ulivelli1, R Rocchi, G Vatti
1Istituo di Clinica delle Malattie Nervose e Mentali, Università di Siena.
Abstract:
Seventy five adult patients suffering from partial epilepsy were investigated by MRI. Results were then compared with those obtained with CT scan and EEG analysis. The interval between the two neuroradiological studies did not exceed five years. MRI and CT showed abnormalities respectively in 45 and 55% of patients, MRI showed a better sensitivity in detecting ischemic or atrophy-gliosis chronic focal alterations. In the remaining lesions such as tumors, vascular malformations, cysts and diffuse atrophies, where often an urgent diagnosis is necessary, both tests were equally sensitive. EEG showed alterations in 80% of patients and agreed with results of CT scan and MRI in about 80% of cases.
Insights
Magnetic Resonance Imaging (MRI) and Computed Tomography (CT) scans were compared for partial epilepsy diagnosis. MRI demonstrated superior sensitivity for detecting chronic focal alterations, while both imaging techniques were equally effective for acute lesions.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Partial epilepsy diagnosis relies on accurate identification of underlying brain abnormalities.
- Conventional imaging techniques like CT scans and electroencephalography (EEG) have limitations in detecting subtle lesions.
Purpose of the Study:
- To compare the diagnostic sensitivity of MRI and CT scans in adult patients with partial epilepsy.
- To evaluate the concordance of MRI and CT findings with EEG results.
Main Methods:
- Seventy-five adult patients with partial epilepsy underwent both MRI and CT scans within a five-year interval.
- Results from MRI and CT were compared with each other and with EEG findings.
Main Results:
- MRI detected abnormalities in 45% of patients, while CT identified abnormalities in 55%.
- MRI showed higher sensitivity in detecting ischemic or atrophy-gliosis chronic focal alterations.
- Both MRI and CT exhibited equal sensitivity for detecting acute lesions like tumors, vascular malformations, and cysts.
- EEG revealed abnormalities in 80% of patients, with approximately 80% agreement with both CT and MRI findings.
Conclusions:
- MRI is more sensitive than CT for detecting specific chronic focal brain alterations in partial epilepsy.
- Both MRI and CT are valuable tools for diagnosing various lesions in partial epilepsy, with comparable sensitivity for acute pathologies.
- EEG remains a crucial complementary diagnostic tool, showing good agreement with neuroimaging results.