Abstract #0882
Prospective head motion correction in 3D FLASH using EPI-based volumetric navigators (vNavs)
M. Dylan Tisdall 1,2 , Himanshu Bhat 3 , Keith Heberlein 3 , and Andr J. W. van der Kouwe 1,2
1
A. A. Martinos Center for Biomedical
Imaging, Massachusetts General Hospital, Charlestown,
Massachusetts, United States,
2
Radiology,
Harvard Medical School, Boston, Massachusetts, United
States,
3
Siemens
Medical Solutions USA Inc., Charlestown, Massachusetts,
United States
We demonstrate the use of EPI-based volumetric
navigators (vNavs) in 3D FLASH for prospective
correction of head motion. Unlike in previous works with
vNavs, where the navigator was inserted into dead time
(e.g., TR or TI fill), in vNav FLASH we use the same
pulse and TR for both vNavs and the FLASH TRs, allowing
us to alternate between them without disturbing the
magnetization steady state. We demonstrate the use of
this sequence to perform prospective motion correction
in a volunteer.
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