Abstract #3968
In vivo cardiac diffusion tensor imaging using a spiral trajectory
Andrew David Scott 1 , Pedro Ferreira 1 , Sonia Nielles-Vallespin 1,2 , Iain Pierce 1,3 , Laura-Ann McGill 1,3 , Dudley Pennell 1,3 , and David Firmin 1,3
1
NIHR Funded Biomedical Research Unit, The
Royal Brompton Hospital, London, London, United Kingdom,
2
National
Heart, Lung and Blood Institute, National Heart and Lung
Institute, Bethesda, Maryland, United States,
3
National
Heart and Lung Institute, Imperial College London,
London, United Kingdom
In vivo cardiac diffusion tensor imaging (cDTI) is
commonly performed using a stimulated echo sequence
(STEAM) with an echo planar imaging (EPI) readout. Here
we combine a zonal excitation to excite a small square
field of view with a single-shot spiral readout and
STEAM. The centre-out nature of spiral trajectories
results in reduced TE and, therefore less T2 decay than
for the equivalent EPI sequence. In this first
demonstration of spiral cDTI, helical angle, mean
diffusivity and fractional anisotropy values match those
in previous literature. With techniques like parallel
imaging, spatial resolution may be improved beyond that
available using EPI.
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