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Abstract #1709

Rapid prototyping of a motion-robust 2D Radial GRE sequence with reduced acoustic noise generation using Pulseq

Elisa Marchetto1,2, Maxim Zaitsev3, and Daniel Gallichan1,2
1School of Engineering, Cardiff University, Cardiff, United Kingdom, 2Cardiff University Brain Research Centre (CUBRIC), Cardiff University, Cardiff, United Kingdom, 3High Field MR Center, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria


A radial GRE-sequence was modified using Pulseq to reduce the acoustic noise amount produced by the rapid switching of gradient currents without excessively increasing the TR-time. Prospective motion-correction was performed using a markerless tracking device that sent the motion estimates to the scanner via the libXPACE framework, incorporated directly into Pulseq, to update gradients and RF pulses during the MR scan. The quieter sequence resulted in a acoustic noise reduction of 6 dB(A) (i.e. a factor of 2) compared to the standard one. Image quality was greatly improved using prospective motion-correction in the case of deliberate motion during the scan.

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