Neuroimaging of Status Epilepticus

Status epilepticus (SE) represents a neurological emergency characterised by prolonged or recurrent seizures without full recovery of consciousness. Rapid and accurate diagnosis is essential to guide treatment and limit permanent neuronal injury. Neuroimaging techniques, particularly magnetic resonance imaging (MRI), have become indispensable for detecting peri-ictal and post-ictal brain alterations. Diffusion-weighted imaging (DWI) frequently reveals transient diffusion-restricted lesions in regions such as the cortex, hippocampus and thalamic pulvinar, reflecting cytotoxic oedema during sustained epileptic activity. Perfusion-based methods—dynamic susceptibility contrast (DSC) MRI and arterial spin labelling (ASL)—demonstrate ictal hyperperfusion and post-ictal hypoperfusion patterns, aiding differentiation from mimics such as acute ischaemic stroke. Advanced image-processing algorithms now allow semi-quantitative regional analysis and automated lesion detection, improving consistency and throughput. Together, structural and functional neuroimaging illuminate the spatial distribution of seizure activity, inform prognosis and support tailored therapeutic interventions on a global scale.

Research from Nature Portfolio

A multicentre study evaluated multi-delay arterial spin labelling against DSC, fluid-attenuated inversion recovery and diffusion-weighted protocols in over ninety patients with SE or self-limiting seizures. Arterial spin labelling achieved the highest sensitivity (>90%) for initial detection of status epilepticus and showed superior prediction of refractory seizures and poor outcomes compared with other MRI sequences and electroencephalography. Despite low specificity, ASL’s non-invasive nature and quantitative maps position it as a valuable first-line imaging tool in emergency settings and for prognostic stratification.

Neuroimaging of Status Epilepticus publication trend

The graph below shows the total number of articles in neuroimaging of status epilepticus across all publications each year (not limited to Nature Index journals).

Technical terms

Status epilepticus: A neurological emergency of continuous or rapidly recurring seizures lasting beyond a critical duration, risking irreversible brain injury.

Diffusion-weighted imaging: An MRI technique sensitive to the motion of water molecules, used to detect cytotoxic oedema by measuring diffusion restriction.

Apparent diffusion coefficient: A quantitative map derived from diffusion-weighted images that reflects the degree of water diffusivity in tissue.

Arterial spin labelling: A non-invasive perfusion MRI method that uses magnetically labelled blood water as an endogenous tracer to quantify cerebral blood flow.

Perfusion MRI: A family of imaging techniques, including DSC and ASL, that assesses regional cerebral blood flow and volume to characterise haemodynamic changes.

References

1. Usefulness of arterial spin labeling perfusion as an initial evaluation of status epilepticus. Scientific Reports (2021).
2. Magnetic resonance imaging fingerprints of status epilepticus: A case–control study. Epilepsia (2024).
3. Large-scale transient peri-ictal perfusion magnetic resonance imaging abnormalities detected by quantitative image analysis. Brain Communications (2023).
4. Quantitative Analysis of Diffusion-Restricted Lesions in a Differential Diagnosis of Status Epilepticus and Acute Ischemic Stroke. Frontiers in Neurology (2022).