Evaluation method for in-situ electric field of different TMS coils in human brain

摘要

This study proposes a method to evaluate focal stimulation in the target area of the brain for non-invasive electro-/magneto-stimulation. The feasibility of three different coils used in transcranial magnetic stimulation (TMS) is considered for clinical applications. In the second part, we investigate the induced electric fields in the brain using ten individual anatomically realistic models of the head. The group-average electric fields are studied using a registration procedure to map each individual's brain to the standard brain space. From computational results, it is difficult to localize the induced electric field in the target area of the brain due to the morphological variability of the human brain, at least for the coils considered herein. The evaluation method proposed is useful for future design of the coils.