Meeting Banner
Abstract #2380

Optimal flip angle and signal shaping for single-shot volumetric DREAM B 1 mapping

Rdiger Stirnberg 1 , Daniel Brenner 1 , and Tony Stcker 1,2

1 German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany, 2 Department of Physics and Astronomy, University of Bonn, Bonn, Germany

The use of a unique steady-state flip angle for optimal signal shaping in 3DREAM, a volumetric single-shot B 1 mapping method, is investigated. While free-induction-decay signals are shaped constantly when employing the proposed flip angle, the predictable exponential decay of stimulated echoes is shown to act as a 2D Gaussian filter on the stimulated echo image due to a spiral-out k-space view-ordering. This filter can be well estimated and employed post-hoc to the free-induction-decay image to equalize resolution properties. This is shown to improve derived B 1 maps. The findings are transferable to conventional, slice-selective DREAM B 1 mapping.

This abstract and the presentation materials are available to members only; a login is required.

Join Here