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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