[Design and field calculation of coil array for transcranial magnetic stimulation (TMS) based on genetic algorithm]

Area of Science:

• Biomedical Engineering
• Electromagnetism
• Computational Neuroscience

Context:

• Transcranial Magnetic Stimulation (TMS) requires precise targeting for effective neuromodulation.
• Current TMS coil designs often lack the ability to focus electromagnetic fields on specific neural targets efficiently.
• Optimizing electromagnetic field distribution is crucial for enhancing TMS efficacy and safety.

Purpose:

• To develop an efficient method for locating the activation point in Transcranial Magnetic Stimulation (TMS).
• To design and evaluate a torus-shaped coil array for achieving ideal electromagnetic field focusing.
• To optimize current values and phases in the coil array using an improved adaptive genetic algorithm (AGA).

Summary:

• A torus-shaped coil array was designed to achieve focused electromagnetic field distribution.
• An improved adaptive genetic algorithm (AGA) was employed to optimize current amplitude and phase for each coil.
• The optimized configurations demonstrated significant focusing capabilities for both magnetic and electric fields.
• The coil array successfully established a focused electromagnetic distribution and showed potential for simultaneous multi-target stimulation.

Impact:

• Provides a novel coil array design for enhanced TMS precision.
• Demonstrates the capability of focused electromagnetic fields for targeted neuromodulation.
• Highlights the potential for simultaneous multi-target TMS applications.
• Advances the efficiency and effectiveness of TMS in neurological and psychiatric treatments.