Design of Double-trapezoidal and Double-layer Transcranial Magnetic Coil with High Focality
[1]JIN Guiping,YANG Sisi,TU Zhihong,et al.Design of Double-trapezoidal and Double-layer Transcranial Magnetic Coil with High Focality[J].Journal of Zhengzhou University (Engineering Science),2025,46(01):119-125.[doi:10.13705/j.issn.1671-6833.2025.01.005]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
46
Number of periods:
2025 01
Page number:
119-125
Column:
Public date:
2024-12-23
- Title:
- Design of Double-trapezoidal and Double-layer Transcranial Magnetic Coil with High Focality
- Keywords:
- electromagnetic induction; focality; transcranial magnetic stimulation; Sim4Life; brain model
- CLC:
- R318Q64TM55
- Abstract:
- Based on the influence of focality on transcranial magnetic coil, a single-channel double-trapezoidal and double-layer coil with high focality was designed to address the insufficient commercial use. Firstly, the ball-head model was used to analyze the coils with same structure but different sizes, and the better coil size was obtained. In order to further improve the focality, the differences of medium-size coil between five different structures of doublelayer coils and two commercial figure-8 coils were analyzed, and the optimal coil structure was obtained. Finally, 50 groups of real brain models with individual differences were used for simulation verification. The simulation results indicated that when using the ball-head model, the optimized coil improved the focality by 69.48% and reduced the depth by 27.18% compared with the 70 mm figure-8 coil, the focality was improved by 44.78%, and the depth was reduced by 8.5% compared with 25 mm figure-8 coil. When using 50 groups of real brain models, the focality of the optimized coil was improved by 62.07% and the depth was reduced by 25.71% compared with the 70 mm figure-8 coil, the focality was improved by 39.49%, and the depth was reduced by 9.5% compared with 25 mm figure-8 coil. Experiment results of two models tended to be consistent, which confirmed the reliability of the simulation and also proved that the optimized coil had stronger stimulation intensity and focality, which could greatly improve the safety of TMS treatment and reduce discomfort. At the same time, the single-channel design was easy to implement and had high performance.
- References:
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Last Update:
2024-12-31