Abstract #3765
B1 correction in SPatiotemporal ENcoding (SPEN) MRI
Rita Schmidt 1 , Jean-Noel Hyacinthe 2 , Andrea Capozzi 3 , Nikolas Kunz 4 , Rolf Gruetter 4,5 , Arnaud Comment 3 , Lucio Frydman 1 , and Mor Mishkovsky 5
1
Chemical Physics, Weizmann Institute of
Science, Rehovot, Israel,
2
School
of health, University of Applied Sciences and Arts
Western Switzerland, Geneva, Switzerland,
3
Institute
of the Physics of Biological Systems, Ecole
Polytechnique Fdrale de Lausanne (EPFL), Lausanne,
Switzerland,
4
Center
of biomedical imaging (CIBM), Ecole Polytechnique
Fdrale de Lausanne (EPFL), Lausanne, Switzerland,
5
Laboratory
of Functional and Metabolic Imaging, Ecole Polytechnique
Fdrale de Lausanne (EPFL), Lausanne, Switzerland
A general challenge of doing MRI with surface coils
arises from the strong inhomogeneity of the
radio-frequency (RF) field. This challenge also arises
in ultrahigh field human MRI applications. Hybrid
spatiotemporal encoding (SPEN) sequence is a new
alternative for ultrafast acquisition, which recently
was demonstrated providing higher immunity to B0
inhomogeneity compared to Echo Planar Imaging (EPI). The
aim of the present work was to use SPEN scheme to
correct for the B1 inhomogeneity by compensating in the
chirped RF pulse amplitude for the spatial B1
distribution. Phantom as well as in-vivo animals
experiments were conducted in 9.4 T MRI.
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