Software Package for Transcranial Magnetic Stimulation Coil and Coil Array Analysis and Design.

Area of Science:

• Biomedical Engineering
• Electromagnetics
• Computational Physics

Background:

• Transcranial Magnetic Stimulation (TMS) requires precise coil design for effective therapeutic application.
• Accurate modeling of electric and magnetic fields is crucial for TMS coil optimization.
• Existing methods for coil analysis can be computationally intensive and complex.

Approach:

• Developed a MATLAB software package for TMS coil analysis and design.
• Employs a wire-based approach to precisely model complex conductor geometries.
• Utilizes the Fast Multipole Method (FMM) for efficient computation of fields and inductances.

Key Points:

• The software computes electric/magnetic fields and self/mutual inductances for coils with or without magnetic cores.
• Handles solid and stranded (Litz wire) conductors, generating wire and CAD meshes automatically.
• Achieved high accuracy, with <0.74% difference from ANSYS Maxwell 3D for inductance and <1.25% difference from experimental measurements.

Conclusions:

• The developed software package offers a precise and efficient tool for TMS coil analysis and design.
• The FMM-based approach ensures rapid evaluation of complex current distributions.
• The software's applicability extends beyond TMS to general quasistatic inductor design.