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Abstract #0593

TWo Interleaved Steady-states for T2 And Rf Estimation (TWISTARE) - a fast 3D-GRE phase-based method of  T2 and B1 mapping in 7T brain imaging

Dana Yacobi1, Amir Seginer2, and Rita Schmidt1
1Department of Brain Sciences, Weizmann Institute of Science, Rehovot, Israel, 2Siemens Healthcare Ltd, Rosh Ha’ayin, Israel


Quantitative T2 mapping is an important tool towards standardization of MRI in clinics and research, whose implementation in 7T MRI will gain SNR and resolution. In this work, we demonstrate a phase-based method with fast 3D spoiled GRE acquisition to estimate T2 and B1 maps in 7T brain imaging. We introduce a new approach employing a dual steady-state with interleaving flip angles - denoted as TWISTARE. This approach is suited to address the RF field inhomogeneity in 7T and can shorten the total scan duration. The new approach was examined using a 3D head-shaped phantom and in human imaging.

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