A triangulation-based magnetic resonance image-guided method for transcranial magnetic stimulation coil positioning

Brain Stimulation
Jamila AndohArnaud Cachia

Abstract

Transcranial magnetic stimulation (TMS) is currently used for cognitive studies and investigated as a treatment for psychiatric disorders. Because of the cortex variability, the coil positioning stage is difficult and should be improved by using individual neuroimaging data. Sophisticated and expensive neuronavigation systems have been developed to guide the coil to selected regions on the patient's magnetic resonance images (MRI). Our objective was to develop a triangulation-based MRI-guided method to position manually the TMS coil over the subject's head, using a cortical target derived from individual MR data. We evaluated both the spatial accuracy and the reproducibility of the method using functional MR activations of two different targets in the motor and parietal cortices. The accuracy of the MRI-guided method, assessed from the Euclidean distance (D(m)) between the thumb motor target and the coil position eliciting reproducible thumb motor-evoked potentials with TMS, was D(m) = 10 +/- 3 mm. The reproducibility of the method, evaluated across two different operators, was D(m) = 6.7 +/- 1.4 mm for the repositioning in the motor cortex and D(m) = 6.0 +/- 3.2 mm in the parietal cortex. This novel method could be used clinic...Continue Reading

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Citations

Oct 29, 2011·Brain Stimulation·Tal Herbsman, Ziad Nahas
Mar 1, 2016·Restorative Neurology and Neuroscience·Edward P Washabaugh, Chandramouli Krishnan
Oct 19, 2017·Restorative Neurology and Neuroscience·Jakob RodsethChandramouli Krishnan
Mar 4, 2020·Neuroinformatics·F BriendO Etard

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