Design of a three dimensional magnetic field measurement system for TMS pre-testing

In the course of treatment and diagnosis of transcranial magnetic stimulation (TMS), the target and non-target are stimulated simultaneously, which produces undesirable side effects. To reduce the risk of such side effects, it is essential to test the stimulation before the real treatment. This paper presents the structure of a magnetic field measurement system for TMS pre-testing. The 3D magnetic field measurement structure can use a 3D magnetic sensor to measure the value of electromagnetic field in some specific points of the brain model to reduce the risk that could be caused by directly measuring in human brain and effectively avoid the side effects of TMS.