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Designing a circular coil of repetitive transcranial magnetic stimulation at frequencies of 0.5 and 1 Hz using CST studio suite software and comparison of results with theoretical calculations

Context: Since the 1990s, repetitive transcranial magnetic stimulation (rTMS) has been used as a noninvasive method to diagnose and manage the treatment of many neurological disorders. The circular coil is one of the most common coils in rTMS devices. This study presents the design documentation of a circular coil for use in the rTMS device and examines the consistency of the magnetic field intensity (H) and the magnetic flux density (B) obtained from the simulation of its use with the theoretical values. Aims: This study aimed to design a rTMS circular coil at frequencies of 0.5 and 1 Hz using CST Studio Suite software and compare the intensity of the B- and H-fields with theoretical calculations. Materials and Methods: After designing a circular coil, we measured B and H by simulation with CST Studio Suite software and compared the results with theoretical calculations. Results: The magnetic field intensity and the magnetic flux density obtained from the circular coil simulation we designed had an acceptable consistency with the theoretical values. Conclusions: The B- and H-field intensity whether on the body or in the air, or on the antenna, is fairishly consistent with theoretical calculations.