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Abstract #1437

Concurrent TMS/EEG/fMRI at 3T using the “RF-EEG Cap”

Mohammad Daneshzand1,2, Sebastian Ardilla1, Yixin Ma1,2, Jason Stockmann1,2, Lincoln Craven-Brightman1, Aapo Nummenmaa1,2, and Lucia Navarro de Lara1,2
1Martinos Center for Biomedical Imaging, MGH, Charlestown, MA, United States, 2Harvard Medical School, Boston, MA, United States

Synopsis

Keywords: fMRI Acquisition, fMRI Acquisition, Transcranial Magnetic Stimulation, Electroencephalography

Motivation: The feasibility of concurrent human TMS/EEG/fMRI at 3T has been demonstrated. However, data were acquired using volume coils, showing extremely low sensitivity and limiting spatiotemporal resolution.

Goal(s): We developed a wearable RF Cap compatible with TMS that enhances sensitivity and enables parallel imaging.

Approach: This study aims to assess the RF cap's imaging capabilities during simultaneous TMS/EEG/fMRI at 3T conducting an experiment on a phantom.

Results: The RF-EEG cap showed a maximal 38% loss on the image quality while TMS affects 15% on the site of stimulation. Gradient and TMS artifacts in EEG were effectively removed using standard techniques.

Impact: The “RF-EEG Cap” facilitates precise brain mapping and real-time monitoring of neuromodulation during concurrent TMS/EEG/fMRI experiments. Moreover, its integration with real-time EEG/fMRI acquisition enables detailed investigation of whole-brain dynamics and supports closed-loop, patient-specific brain stimulation.

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Keywords