Grid and depth intracranial electrodes localization in a normalized space using MRI and CT images.

BLENKMANN ALEJANDRO; PHILLIPS HOLLY; PRINCICH JUAN PABLO; MURAVCHIK CARLOS; KOCHEN SILVIA

Paraná

Congreso; VI Latin American Congress on Biomedical Engineering CLAIB 2014; 2014

Consejo Regional de Ingeniería Biomédica para América Latina (CORAL)

An image processing pipeline for localizing grid and depth intracranial electrodes in a standard space is presented. Open source software and simple in-house scripts were used to process MRI and CT images in order to transform coordinates from each subject´s native space into standard (MNI152) space. Then a semiautomatic procedure was applied to label the electrodes. The method was performed in 6 patients candidates for epilepsy surgery with a number of electrodes per subject ranging 48 to 128. The electrode distance to the normalized brain cortex was measured in order to quantify the method performance. Mean distance was 4.5mm and standard deviation 2.5mm.