title: [Design and field calculation of coil array for transcranial magnetic stimulation (TMS) based on genetic algorithm].
abstract: It is the intent of this paper to locate the activation point in Transcranial Magnetic Stimulation (TMS) efficiently. The schemes of coil array in torus shape is presented to get the electromagnetic field distribution with ideal focusing capability. Then an improved adaptive genetic algorithm (AGA) is applied to the optimization of both value and phase of the current infused in each coil. Based on the calculated results of the optimized current configurations, ideal focusing capability is drawn as contour lines and 3-D mesh charts of magnitude of both magnetic and electric field within the calculation area. It is shown that the coil array has good capability to establish focused shape of electromagnetic distribution. In addition, it is also demonstrated that the coil array has the capability to focus on two or more targets simultaneously.
authors.affiliation: College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China.
authors.forename: Jicheng
authors.initials: J
authors.lastname: Liu
authors.forename: Kama
authors.initials: K
authors.lastname: Huang
authors.forename: Lanting
authors.initials: L
authors.lastname: Guo
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Yayi
authors.initials: Y
authors.lastname: Hu
mesh_terms: D000465:Algorithms; D001921:Brain / Q000502:physiology; D004558:Electric Stimulation / Q000295:instrumentation; D004574:Electromagnetic Fields; D004867:Equipment Design; D019054:Evoked Potentials, Motor / Q000502:physiology; D006801:Humans; D009474:Neurons / Q000502:physiology; D050781:Transcranial Magnetic Stimulation