Christoph Birkl1, Christian Kremser2, Alexander Rauscher3, and Elke Ruth Gizewski1
1Department of Neuroradiology, Medical University of Innsbruck, Innsbruck, Austria, 2Department of Radiology, Medical University of Innsbruck, Innsbruck, Austria, 3UBC MRI research Centre, University of British Columbia, Vancouver, BC, Canada
1Department of Neuroradiology, Medical University of Innsbruck, Innsbruck, Austria, 2Department of Radiology, Medical University of Innsbruck, Innsbruck, Austria, 3UBC MRI research Centre, University of British Columbia, Vancouver, BC, Canada
The
different diffusion sensitivity of spin echo and turbo spin echo sequences
affects the estimation of white matter R2 fiber orientation dependency.
Figure 3: R2, normalized to
average global white matter R2, as a function of white matter fiber
orientation. R2 was acquired using multiple single echo spin echo (SE)
sequences (violet curve), a multi-echo SE sequence (green curve), multiple
single echo turbo spin echo (TSE) sequences (blue curve) and a dual-echo TSE
sequence (orange curve).
Figure 1: R2 maps of a volunteer
acquired using multiple single echo spin echo (SE) sequences (a), a multi-echo
SE sequence (b), multiple single echo turbo spin echo (TSE) sequences (c) and a
dual-echo TSE sequence (d).
