Abstract #3048

T1 mapping of the ISMRM/NIST system phantom at 7T.

Rosa Sanchez Panchuelo¹, Olivier Mougin¹, Robert Turner^1,2, and Susan Francis^1,3

¹Sir Peter Mansfield Imaging Centre, UP, University of Nottingham, Nottingham, United Kingdom, ²Max Planck Institute for Human Cognitive and Brain Sciences, Leibzig, Germany, ³NIHR Nottingham Biomedical Research, University of Nottingham, Nottingham, United Kingdom

We report the quantitative T₁ values of the NIST/ISMRM system phantom T₁ and T₂ spheres at 7T. We compare the accuracy and repeatability of T₁ measurements using a 2D multi-slice multi-shot IR-EPI sequence, to 3D MP2RAGE and standard single-slice IR sequences at 3 and 7 T. We show that T₁ measurements are more accurate using MS-IR-EPI compared to MP2RAGE. The T₂-spheres of the NIST/ISMRM system phantom are shown to be best suited for T₁-mapping at 7T as they offer a wider range of T₁-values, better matched than those of the T₁-spheres to those found within the human brain.

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