Coil design considerations for deep-brain transcranial magnetic stimulation (dTMS).
This engineering-focused conference paper proposes figures of merit to evaluate deep-brain transcranial magnetic stimulation (dTMS) coil designs, focusing on depth penetration, scalp stimulation, focality, and energy. It analyzes circular crown and C-core coils and reports reduced electric-field attenuation with depth compared with conventional TMS coils, with preliminary simulations favoring the crown coil. The authors report charge density and heating in the brain are at safe levels, but emphasize that unintended neuromodulation and seizure risks need further evaluation.
Key points
- Figures of merit are proposed to compare dTMS coil designs across depth penetration, scalp stimulation, focality, and energy.
- Circular crown and C-core coil configurations are analyzed as potentially suitable for dTMS.
- Both analyzed coils are reported to show less electric-field attenuation with depth than conventional TMS coils.
- In the large-coil limiting case, electric-field decay with depth is described as linear, implying attenuation proportional to target depth.
- Induced charge density and heating in the brain are stated to be at safe levels in the analysis.
- The authors note that unintended neuromodulation and seizure risk with dTMS requires further evaluation.
- Synchronous firing of coil elements is reported to appear more effective for deep neuron stimulation than sequential firing.
Referenced studies & papers
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AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
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