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| Journal Article | DZNE-2026-00359 |
; ;
2026
Wiley-Liss
New York, NY [u.a.]
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Please use a persistent id in citations: doi:10.1002/mrm.70272
Abstract: A modified interleaved flyback (miFB) approach is introduced, designed to mitigate flow artifacts caused by alternating readout polarities in Echo Planar Imaging (EPI), while preserving acquisition efficiency.We propose reconstructing odd and even echoes of 3D-EPI separately. To this end, the respective missing lines are acquired in interleaved shots with inverted polarity and an additional gradient pre-lobe. Thereby, high scan efficiency is maintained compared to unsampled flyback gradients. Our miFB approach is additionally combined with gradient moment smoothing and compared to the interleaved dual-echo with acceleration (IDEA) method in phantom and in vivo scans at 7 Tesla.Our results demonstrate a significant reduction in ghosting and signal dropout using the miFB approach, yielding comparable image quality to non-EPI acquisitions while reducing acquisition time by approximately half.The miFB approach offers a substantial reduction in flow artifacts, allowing for decreased acquisition times in TOF-MRA.
Keyword(s): Echo-Planar Imaging: methods (MeSH) ; Phantoms, Imaging (MeSH) ; Artifacts (MeSH) ; Algorithms (MeSH) ; Humans (MeSH) ; Imaging, Three-Dimensional: methods (MeSH) ; Image Processing, Computer-Assisted: methods (MeSH) ; 3D‐EPI ; 7T ; echo planar imaging ; flow artifacts ; magnetic resonance angiography
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