Abstract #3046

Parallel transmission for variable flip angle T1 mapping at 7T: initial experiences

Kerrin J Pine¹, Nicolas Gross-Weege², Martina F Callaghan³, and Nikolaus Weiskopf^1,3,4

¹Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, ²Siemens Healthcare GmbH, Erlangen, Germany, ³Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, University College London, London, United Kingdom, ⁴Felix Bloch Institute for Solid State Physics, Faculty of Physics and Earth Sciences, Leipzig University, Leipzig, Germany

In this abstract we detail our first experiences using parallel transmission (pTx) to quantitatively map T₁ via a dual flip-angle approach. We present data from a human volunteer scanned on the 7T Siemens MAGNETOM Terra using the pTx system and a Nova 32-channel receive / 8-channel transmit coil, with online optimized kT-points RF pulses. Data from the same coil in static CP mode (without pTx) was additionally acquired. With the demonstrated reduction in B₁⁺ inhomogeneity, various bias correction schemes used at lower field strengths may become applicable.

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