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Abstract #3871

tSNR increase with field monitoring for correction of scanner instabilities and physiological noise at 7T in single-shot 2D-EPI sequences

Caroline Le Ster1, Alexandre Vignaud1, and Nicolas Boulant1
1Université Paris-Saclay, Neurospin, CEA, Gif-sur-Yvette, France

Signal-dependent noise contributions in a voxel limit the temporal SNR (tSNR) gain brought by increasing the image SNR. The effect of retrospectively correcting for field fluctuations on the tSNR for different SNR regimes at 7T in single-shot 2D-EPI sequences was assessed using field sensor measurements. For the slice located at isocenter, results of the study show an increase of up to 20% in vivo on the grey matter region and for high SNR regimes.

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