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Abstract #4004

Improvements on Single-Shot STEAM with Optimised Signal Shaping for Diffusion Weighted Imaging at High Fields

Rdiger Stirnberg1, Tony Stcker1, N. Jon Shah1,2

1Institute of Neuroscience and Medicine - 4, Medical Imaging Physics, Forschungszentrum Jlich GmbH, Jlich, Germany; 2Faculty of Medicine, Department of Neurology, RWTH Aachen University, Aachen, Germany

It was recently shown that a diffusion weighted Single-shot Stimulated Echo Acquisition Mode (DW ss-STEAM) pulse sequence is an alternative to the standard DW EPI at high fields. By designing dedicated variable flip angles (vFA) for accurate, advanced signal shaping without RF spoiling, more signal is utilised. A clear advantage is drawn from parallel imaging due to less phase encoding lines. The results are: EPI-comparable SNR and acquisition time without geometrical distortions at high fields. A basis is now established to potentially incorporate all transverse coherences without interferences (current investigations) promising a further general SNR multiplication of two.