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Abstract #3115

Optimized fMRI pulse sequence for simultaneous EEG-fMRI: Spiral pseudo REal TIme (SpRETI)

Ana Beatriz Solana 1,2 , Juan Antonio Hernndez-Tamames 3,4 , Jos Luis Ortiz 1 , Elena Molina 3 , Eva Manzanedo 3 , Fernando O. Zelaya 5 , and Francisco del Pozo 1

1 Center for Biomedical Technology, Pozuelo de Alarcn, Madrid, Spain, 2 DBT, Global Research Center, General Electric, Munich, Munich, Germany, 3 Universidad Rey Juan Carlos, Madrid, Spain, 4 Fundacin Reina Sofa, Madrid, Spain, 5 King's College London, London, United Kingdom

A new spiral fMRI sequence, called SpRETI, is developed to include the following characteristics: 1) reduced EEG gradient-induced artifacts during simultaneous EEG-fMRI; 2) real time data storage to avoid loss of data; and, 3) acquisition of an optimized B0map inside the pulse sequence. SpRETI performance was tested calculating the gradient-induced artifact characteristics in the EEG, and its removal, and the BOLD contrast in a motor and visual tasks. Results were compared with EPI and other two spiral EPI sequences. SpRETI showed the best performance for simultaneous EEG-fMRI: lowest EEG gradient-induced artifact and a similar BOLD contrast.

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