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Abstract #4439

Investigation of the impact of receive field sensitivity on motion corruption in 3D-EPI for fMRI

Nadine N Graedel1, Nadege Corbin1, Yael Balbastre1, Oliver Josephs1, and Martina F Callaghan1

1Wellcome Centre for Human Neuroimaging, UCL Institute of Neurology, London, United Kingdom

High temporal signal-to-noise ratio (tSNR) is crucial in fMRI to maximise functional sensitivity. The use of high-density receiver arrays can greatly improve tSNR and enables parallel imaging, a requirement for imaging with high spatial resolution while maintaining reasonable scan times. The 3D-EPI approach enables through plane acceleration but at the cost of increased motion sensitivity. Here we explore the impact of rapidly varying sensitivity fields on the degradation of tSNR in the presence of motion in the context of 3D-EPI.

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