OBJECTIVES: To evaluate a novel method for localization of subdural electrodes in presurgical assessment of patients with drug-resistant focal epilepsy. METHODS: We studied eight consecutive patients with posterior epilepsy in whom subdural electrodes were implanted for presurgical evaluation. Electrodes were detected on post-implantation brain CT scans through a semiautomated procedure based on a MATLAB routine. Then, post-implantation CT scans were fused with pre-implantation MRI to localize the electrodes in relation to the underlying cortical structures. The reliability of this procedure was tested by comparing 3D-rendered MR images of the electrodes with electrode position as determined by intraoperative digital photography. RESULTS: In each patient, all electrodes could be correctly localized and visualized in a stereotactic space, thus allowing optimal surgery planning. The agreement between the procedure-generated images and the digital photographs was good according to two independent raters. The mean mismatch between the 3D images and the photographs was 2 mm. CONCLUSIONS: While our findings need confirmation on larger samples including patients with anterior epilepsy, this procedure allowed to localize subdural electrodes and to establish the spatial relationship of each electrode to the underlying brain structure, either normal or damaged, on brain convessity, basal and medial cortex. SIGNIFICANCE: Being simple, rapid, unexpensive, and reliable, this procedure holds promise to be useful to optimize epilepsy surgery planning.
OBJECTIVES: To evaluate a novel method for localization of subdural electrodes in presurgical assessment of patients with drug-resistant focal epilepsy. METHODS: We studied eight consecutive patients with posterior epilepsy in whom subdural electrodes were implanted for presurgical evaluation. Electrodes were detected on post-implantation brain CT scans through a semiautomated procedure based on a MATLAB routine. Then, post-implantation CT scans were fused with pre-implantation MRI to localize the electrodes in relation to the underlying cortical structures. The reliability of this procedure was tested by comparing 3D-rendered MR images of the electrodes with electrode position as determined by intraoperative digital photography. RESULTS: In each patient, all electrodes could be correctly localized and visualized in a stereotactic space, thus allowing optimal surgery planning. The agreement between the procedure-generated images and the digital photographs was good according to two independent raters. The mean mismatch between the 3D images and the photographs was 2 mm. CONCLUSIONS: While our findings need confirmation on larger samples including patients with anterior epilepsy, this procedure allowed to localize subdural electrodes and to establish the spatial relationship of each electrode to the underlying brain structure, either normal or damaged, on brain convessity, basal and medial cortex. SIGNIFICANCE: Being simple, rapid, unexpensive, and reliable, this procedure holds promise to be useful to optimize epilepsy surgery planning.
Authors: Vahid Taimouri; Alireza Akhondi-Asl; Xavier Tomas-Fernandez; Jurriaan M Peters; Sanjay P Prabhu; Annapurna Poduri; Masanori Takeoka; Tobias Loddenkemper; Ann Marie R Bergin; Chellamani Harini; Joseph R Madsen; Simon K Warfield Journal: Int J Comput Assist Radiol Surg Date: 2013-06-23 Impact factor: 2.924
Authors: Michael S Trotta; John Cocjin; Emily Whitehead; Srikanth Damera; John H Wittig; Ziad S Saad; Sara K Inati; Kareem A Zaghloul Journal: Hum Brain Mapp Date: 2017-11-02 Impact factor: 5.038
Authors: Allan A Azarion; Jue Wu; Allison Pearce; Veena T Krish; Joost Wagenaar; Weixuan Chen; Yuanjie Zheng; Hongzhi Wang; Timothy H Lucas; Brian Litt; James C Gee; Kathryn A Davis Journal: Epilepsia Date: 2014-11-06 Impact factor: 5.864
Authors: Andrew I Yang; Xiuyuan Wang; Werner K Doyle; Eric Halgren; Chad Carlson; Thomas L Belcher; Sydney S Cash; Orrin Devinsky; Thomas Thesen Journal: Neuroimage Date: 2012-06-30 Impact factor: 6.556
Authors: Alejandro O Blenkmann; Holly N Phillips; Juan P Princich; James B Rowe; Tristan A Bekinschtein; Carlos H Muravchik; Silvia Kochen Journal: Front Neuroinform Date: 2017-03-02 Impact factor: 4.081