Abstract #4166

Concurrent alternating transcranial current stimulation and fMRI: subject safety and the data quality evaluation

Beni Mulyana^1,2, Qingfei Luo¹, Aki Tsuchiyagaito¹, Ashkan Rashedi¹, Jared Smith¹, Masaya Misaki¹, Duke Shereen³, Samuel Cheng², Martin Paulus¹, Hamed Ekhtiari¹, and Jerzy Bodurka^1,4

¹Laureate Institute for Brain Research, Tulsa, OK, United States, ²University of Oklahoma, Tulsa, OK, United States, ³The Graduate Center, City University of New York, New York, NY, United States, ⁴Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK, United States

We evaluated subject safety and the fMRI image quality in the presence of transcranial alternating current stimulation (tACS). Scalp temperatures under the tACS electrodes with and without stimulations were measured. Result indicated: i) the tACS stimulation itself had no harmful impact on scalp temperature; ii) tACS’s artifacts had negligible effects on fMRI images. Although the fMRI scan produced heating effects due to the RF energy deposition in tACS electrodes, the scalp temperatures remained below 37°C during a 12-min scan regardless of the presence of stimulations. Thus, concurrent tACS with fMRI has no impact on patient safety and image quality.

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