Key Points
The main goal of neuroimaging in seizures is to rule out focal lesions that could threaten the patient’s life (i.e., neoplasm or other intracranial space-occupying lesion). The most important role of neuroimaging in epilepsy is to identify the structural substrate of the epileptogenic focus. Neuroimaging is not recommended for a simple febrile seizure (limited evidence). Computed tomography scan is the best imaging study in the evaluation of patients with acute nonfebrile symptomatic seizures because it detects important abnormalities, such as acute intracranial hemorrhage, that may require immediate medical or surgical treatment (limited evidence). Magnetic resonance imaging (MRI) is the neuroimaging study of choice in the workup of first unprovoked seizures (moderate evidence). Focal neurologic deficit is an important predictor of an abnormality in the neuroimaging examination (moderate evidence). Magnetic resonance (MR) evaluation should be performed in nonacute symptomatic seizure patients with confusion and postictal deficits (moderate evidence). MR should be performed in children with unexpected cognitive or motor delays or children under 1 year of age, with remote symptomatic seizures (moderate evidence). Patients with focal seizures, abnormal EEG, or generalized epilepsy should be imaged (moderate evidence). MRI is the imaging modality of choice in temporal lobe epilepsy (moderate evidence). Ictal single photon emission computed tomography (SPECT) is the best neuroimaging examination to localize seizure activity (moderate evidence).
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Bernal, B., Altman, N. (2011). 14 Neuroimaging of Seizures. In: Medina, L., Blackmore, C., Applegate, K. (eds) Evidence-Based Imaging. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-7777-9_14
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