چكيده به لاتين
In the past two decades, Transcranial Magnetic Stimulation (TMS) has been utilized in research protocols and clinical treatment of neurological disorders. In this thesis, we first examine the penetration of the electric field from the H-coil into the head, and then we compare it with various array coils that we simulated using CST software, proposing an array coil for each specific condition. The overarching idea in this thesis is that a unique array coil is suggested for each individual based on their specific condition, along with a method that aims to yield results in a shorter time frame. One of the fundamental issues with simulations in conventional numerical software is the time-consuming nature of such simulations. To achieve the optimal coil arrangement for an individual based on their condition, it often requires several hours or even days of repeated simulations. However, in this new proposed method, we aim to optimize the time to results with a new solution, ultimately allowing us to reach a final answer in just a few minutes. By doing this, we can obtain a map of the targeted area of the brain for someone with a specific issue through MRI, and since this method is very fast, we can optimize the coefficients and fields for each person and propose a coil element tailored to them. The results indicate that these coil arrays can create a clear focal area more than 10 centimeters beneath the scalp, satisfying the necessary depth for brain magnetic stimulation. Under the same Joule loss constraints, the optimized arrays can increase the intracranial stimulation intensity by up to 131%, enhance the longitudinal attenuation ratio by 4.5 times, and reduce the focus area by up to 76% compared to conventional flat magnetic stimulation arrays. The proposed arrays have significant advantages in deep brain stimulation, and the optimization method for the spatial array described in this study could serve as a valuable reference for coil or array optimization processes in other practical fields
