Validation of algorithm used for location of electrodes in CT images

19th Argentinean Bioengineering Society Congress

Bustos, J.^1 ; Graffigna, J.P.^1 ; Isoardi, R.^1 ; Gómez, M.E.^1 ; Romo, R.^1

Gabinete de Tecnología Médica, Facultad de Ingeniería, Universidad Nacional de San Juan, San Juan, Argentina^1

关键词: Coordinate space;    Ct and mr images;    Electro-encephalogram (EEG);    Electrode size;    Focal epilepsy;    Image processing algorithm;    Noninvasive technique;    Spatial location;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/477/1/012025/pdf
DOI  :  10.1088/1742-6596/477/1/012025

来源: IOP

【 摘 要 】

It has been implement a noninvasive technique to detect and delineate the focus of electric discharge in patients with mono-focal epilepsy. For the detection of these sources it has used electroencephalogram (EEG) with 128 electrodes cap. With EEG data and electrodes position, it is possible locate this focus on MR volumes. The technique locates the electrodes on CT volumes using image processing algorithms to obtain descriptors of electrodes, as centroid, which determines its position in space. Finally these points are transformed into the coordinate space of MR through a registration for a better understanding by the physician. Due to the medical implications of this technique is of utmost importance to validate the results of the detection of electrodes coordinates. For that, this paper present a comparison between the actual values measured physically (measures including electrode size and spatial location) and the values obtained in the processing of CT and MR images.