Keywords: Artifacts, Velocity & Flow, 3D-EPI
Motivation: As of yet, ghosting and signal dropouts limit the usability of EPI sequences for MRA-TOF compared to well-established methods such as GRE-TOF.
Goal(s): Our goal was to mitigate flow artifacts in MRA-TOF images at short acquisition times whilst improving the efficiency of previous techniques
Approach: We introduced a novel Flyback sampling approach in a highly segmented skipped-CAIPI 3D-EPI sequence with phase partial Fourier to acquire in vivo data at a resolution of 0.6mm isotropic at 7T within about one minute.
Results: The in vivo measurements show a significant reduction in ghosting and signal dropout and improved resolution of small vessels in TOF MIPs.
Impact: Reduced acquisition times and flow artifacts of highly segmented skipped-CAIPI 3D-EPI with a modified, interleaved Flyback acquisition and partial Fourier may increase the applicability of EPI for fast MRA-TOF.
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