Publications by authors named "A Parashos"

Despite decades of advancements in diagnostic MRI, 30-50% of temporal lobe epilepsy (TLE) patients remain categorized as "non-lesional" (i.e., MRI negative or MRI-) based on visual assessment by human experts.

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Convolutional neural networks (CNN) show great promise for translating decades of research on structural abnormalities in temporal lobe epilepsy into clinical practice. Three-dimensional CNNs typically outperform two-dimensional CNNs in medical imaging. Here we explore for the first time whether a three-dimensional CNN outperforms a two-dimensional CNN for identifying temporal lobe epilepsy-specific features on MRI.

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Article Synopsis
  • Intracranial EEG helps identify networks associated with focal epilepsy, but how these network structures affect post-surgery seizure outcomes is not well understood.
  • The study tested whether better surgical outcomes are linked to removing key brain regions (hubs) involved in seizure activity, measured by a new metric called Resection-Hub Alignment Degree (RHAD).
  • Results indicated that a significant difference in RHAD was found between patients with good and bad surgical results, suggesting that analyzing network hubs offers better insights than traditional methods in predicting post-surgery epilepsy outcomes.
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Patients with drug-resistant temporal lobe epilepsy often undergo intracranial EEG recording to capture multiple seizures in order to lateralize the seizure onset zone. This process is associated with morbidity and often ends in postoperative seizure recurrence. Abundant interictal (between-seizure) data are captured during this process, but these data currently play a small role in surgical planning.

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Background And Objectives: Postoperative seizure control in drug-resistant temporal lobe epilepsy (TLE) remains variable, and the causes for this variability are not well understood. One contributing factor could be the extensive spread of synchronized ictal activity across networks. Our study used novel quantifiable assessments from intracranial EEG (iEEG) to test this hypothesis and investigated how the spread of seizures is determined by underlying structural network topological properties.

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