Abstract #4564

Simultaneous Saturation and Excitation (SatEx) pulse

Shota Hodono¹, Chia-yin Wu^1,2,3, Carl Dixon¹, Donald Maillet¹, Jin Jin⁴, Jonathan R Polimeni^5,6, and Martijn A Cloos¹

¹Centre for Advanced Imaging, The University of Queensland, St. Lucia, Australia, ²ARC Training Centre for Innovation in Biomedical Imaging Technology, The University of Queensland, St. Lucia, Australia, ³chool of Information Technology and Electrical Engineering, The University of Queensland, St. Lucia, Australia, ⁴Siemens Healthcare Pty Ltd, Brisbane, Australia, ⁵Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States, ⁶Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, United States

Synopsis

Keywords: RF Pulse Design & Fields, Velocity & FlowWe propose a new slice-selective excitation pulse that simultaneously saturates magnetization adjacent to it. The Saturation and Excitation (SatEx) pulse is a summation of two asymmetric sinc pulses whose leading lobes have been cut combined with an asymmetric excitation pulse with its final lobes truncated. The saturation and excitation slice profile were validated in simulations and a flow-phantom scan. The flow-phantom scan showed strong saturation of inflow effects. Since the SatEx pulse is as short as a conventional sinc excitation pulse, it can be implemented in a wide range of fast imaging sequences to suppress inflow effects without lengthening TR.

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