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Abstract #2046

Sinusoidal Echo-Planar Imaging with Parallel Acquisition Technique for Reduced Acoustic Noise in Auditory FMRI

Jascha Zapp1, Sebastian Schmitter2, Lothar R. Schad1

1Computer Assisted Clinical Medicine, Heidelberg University, Mannheim, Germany; 2Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, United States

Acoustic scanner noise causes an unwanted BOLD signal in the auditory cortex during fMRI and also poses a safety issue. Conventional EPI produces high sound pressure level (SPL) due to fast switching of trapezoidal gradients.

Keywords

achieves acoustic acquisition addition altered alternatively amounts application approximated arbitrary assisted auditory bandwidth basis beneficial blipped bold boundary brain calculating calculation calibrated cause channel clinical close coil combination come commonly comprehensive compromised configurations consideration considered constraints context contrast convolution cortex depicted determined distributed electronic enables enhances environment equivalent expanded expected facilitates fast favorable flat frequencies frequency function fundamental furthermore general gradient gradients harmonics head hearing identical identified impairment implementation implemented impulse increasing inside integration investigation issue labeled language length like locally located lowest mater matrix microphone minimized mounted music networks noise operate optical optimal parallel part phantom pixel pixels planar poses previously processing produces profit proposed protection provoke radiology reach readout reasonably reconstruction reduced reduces reduction resolution respectively response resting restrictions rising sampling scheme selection setup short shortened shortening since sinusoidal sinusoidally slice sound spectrum survey switched switching system third timing tinnitus train trapezoidal trio versus visible water waveform wide written