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Multimodal validation of temporal interference in a 3D-printed pediatric head phantom
Behnam Ghabel Damirchi1, Saeed Jahromi1, Alireza Vaysi1
1Department of Bioengineering, The University of Texas at Arlington, Arlington, TX, USA; Neuroscience Research Center, Jane and John Justin Institute for Mind Health, Cook Children's Health Care System, Fort Worth, TX, USA.
High-frequency carrier transcranial temporal interference stimulation (tTIS) offers improved spatial confinement for deep brain stimulation in pediatric models. This technique shows promise for future pediatric neuromodulation applications.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Medical Physics
Background:
- Transcranial temporal interference stimulation (tTIS) enables deep brain electrical envelope generation.
- Current tTIS applications are limited, especially in pediatric populations.
Purpose of the Study:
- To assess the accuracy of tTIS envelope reconstruction in deep brain structures.
- To validate tTIS in a pediatric phantom model across various frequency bands.
Main Methods:
- A 3D-printed pediatric head phantom with embedded dipoles was used.
- High-frequency carrier (HF-C) and low-frequency carrier (LF-C) signals were applied via scalp electrodes.
- High-density electroencephalography (hd-EEG) and time-frequency analysis validated reconstructed fields.
Main Results:
- HF-C demonstrated superior spatial confinement (7-23 mm deviations) compared to LF-C (50-64 mm deviations).
- Optimal performance for HF-C was observed with 7-9 kHz carriers.
- Statistical analysis confirmed significant power differences in targeted regions.
Conclusions:
- HF-C tTIS provides more spatially precise envelope reconstruction in deep brain targets.
- The 7-9 kHz carrier range shows enhanced spatial confinement for pediatric phantom models.
- This study supports tTIS feasibility for pediatric deep brain stimulation.
