Daniel Löwen1, Eberhard Daniel Pracht1, Rüdiger Stirnberg1, and Tony Stöcker1,2
1German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany, 2Department of Physics and Astronomy, University of Bonn, Bonn, Germany
1German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany, 2Department of Physics and Astronomy, University of Bonn, Bonn, Germany
We
present a time-efficient water-selective, parallel transmit RF
excitation pulse for ultra-high field applications.
Figure 1: A comparison of different water excitation schemes. Top: RECT kT-point excitation as used in [5]. Middle: “Classical” binomial 1-1 excitation applied to kT-points pulses. The second pulse starts at an odd number of half phase cycles of fat. Bottom: Proposed interleaved version of the 1-1 binomial kT-points pulse.
Figure 3: In vivo
MP-RAGE acquisition employing a 7sh interleaved binomial
kT-points pulse (Table 1) for excitation (bottom) compared to a
non-selective CP-mode MP-RAGE acquisition (top). Each with (right)
and without (left) fat suppression.
Yellow arrows point
at better homogenization with kT-points. Green arrows point at
missing fat artifacts with water excitation (WE).
