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Abstract #4166

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

Beni Mulyana1,2, Qingfei Luo1, Aki Tsuchiyagaito1, Ashkan Rashedi1, Jared Smith1, Masaya Misaki1, Duke Shereen3, Samuel Cheng2, Martin Paulus1, Hamed Ekhtiari1, and Jerzy Bodurka1,4
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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