Abstract #1708
2D-segmented, multi-TE 3D-EPI for high-resolution R 2 * and quantitative susceptibility mapping at 7 Tesla
Rdiger Stirnberg 1 , Julio Acosta-Cabronero 2 , Benedikt A. Poser 3 , and Tony Stcker 1,4
1
German Center for Neurodegenerative Diseases
(DZNE), Bonn, Germany,
2
German
Center for Neurodegenerative Diseases (DZNE), Magdeburg,
Germany,
3
Faculty
of Psychology and Neuroscience, Maastricht University,
Maastricht, Netherlands,
4
Department
of Physics and Astronomy, University of Bonn, Bonn,
Germany
Recently, the feasibility of quantitative susceptibility
mapping (QSM) at 3 Tesla using segmented 3D-EPI
requiring only a fraction of conventional gradient echo
(GRE) acquisition times, has been demonstrated. Moving
to higher field strengths usually involves higher
spatial resolutions and shorter echo times. The use of
additional in-plane segmentation in 3D-EPI is proposed
here to meet both requirements at 7 Tesla. Multiple R
2
*
weightings further increase the sequence flexibility.
QSM results at 0.8mm in-plane resolution show that more
than one EPI average is hardly needed when compared to
GRE. More advanced applications, such as susceptibility
tensor imaging, thus become feasible.
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