Abstract #0772

7 tesla MRI in the pre-surgical evaluation of 26 patients with focal epilepsy

Tim J Veersema¹, Cyrille H Ferrier¹, Pieter van Eijsden¹, Peter H Gosselaar¹, Fredy Visser^2,3, Jaco JM Zwanenburg^2,4, Hans Hoogduin², Gerárd AP de Kort², Jeroen Hendrike², and Kees PJ Braun¹

¹Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, Netherlands, ²Department of Radiology, University Medical Center Utrecht, Utrecht, Netherlands, ³Philips Healthcare, Best, Netherlands, ⁴Image Sciences Institute, University Medical Center Utrecht, Utrecht, Netherlands

For this series we assessed all 26 epilepsy patients who underwent 7T MRI for pre-surgical evaluation in our center, and whose scans (both 7T and lower field) were discussed during epilepsy surgery meetings (ESM). We compared the conclusions of the visual assessments of 1.5T or 3T, and 7T MRI as agreed upon by the ESM team. 7T MRI holds a promise to improve identification of epileptogenic structural abnormalities in patients with intractable epilepsy. In our series of 26 patients with refractory focal epilepsy, multidisciplinary evaluation of 7T MRI identified additional lesions not seen on lower-field MRI in five patients (19.2%).

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