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Abstract #5091

Increasing the repeatability of DESS 3D brain T2 mapping with optimized k-space sampling order

Emile Clements Kadalie1, Aurélien J Trotier1, Nadège Corbin1, Sylvain Miraux1, and Emeline J Ribot1
1Centre de Résonance Magnétique des Systèmes Biologiques, UMR5536, CNRS / Université de Bordeaux, Bordeaux, France

Synopsis

Keywords: Quantitative Imaging, Brain, T2 mappingWhile recent works have determined that the DESS sequence has the ability to produce 3D T2 mapping of the brain, it remains sensitive to B0-related variation due to respiration. Multiple encoding strategies, using cartesian-spiral trajectories with different lengths combined with a variable density Poisson undersampling mask and Compressed-Sensing reconstruction, were consequently employed and compared in order to suppress respiration artifacts as well as to establish accurate and repeatable 3D T2 maps of the brain at 3T.

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Keywords