Abstract #2576
Quantification of Fetal Motion Tracked with Volumetric Navigator MRI Acquisitions
Patrick McDaniel 1 , Borjan Gagoski 2 , M. Dylan Tisdall 3,4 , Andr J. W. van der Kouwe 3,4 , P. Ellen Grant 2,4 , Lawrence Wald 3,4 , and Elfar Adalsteinsson 1,5
1
Electrical Engineering and Computer Science,
Massachusetts Institute of Technology, Cambridge, MA,
United States,
2
Fetal-Neonatal
Neuroimaging and Developmental Science Center, Boston
Children's Hospital, Harvard Medical School, Boston, MA,
United States,
3
Athinoula
A. Martinos Center for Biomedical Imaging, Charlestown,
MA, United States,
4
Radiology, Massachusetts
General Hopsital, Boston, MA, United States,
5
Health
Sciences and Technology, Harvard-MIT, Cambridge, MA,
United States
The ability to perform higher quality fetal brain
imaging would be facilitated by navigators that track
fetal head motion. We demonstrate the feasibility of
measuring this motion along six degrees of freedom using
3D volumetric navigator (vNav) acquisitions. A series of
vNavs is acquired over time, and a fetal head ROI is
identified within the first 3D volume to serve as a
template for rigid-body registration of subsequent 3D
images. Registrations are performed with FSL FLIRT,
producing affine transformation matrices which provide
quantitative measurements of fetal head displacement and
rotation.
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