Parallel-transmission-enabled 3D T 2 -weighted imaging of the human brain at 7 Tesla
Aurlien Massire 1 , Alexandre Vignaud 1 , Alexis Amadon 1 , Benjamin Robert 2 , Denis Le Bihan 1 , and Nicolas Boulant 1
CEA DSV I2BM NeuroSpin UNIRS, Gif-sur-Yvette,
Healthcare, St Denis, France
We use the gradient ascent pulse engineering algorithm
combined with the kT-point method to design all the
non-selective refocusing pulses of a SPACE sequence that
mitigate severe B1+ and ΔB0 inhomogeneities. The novelty
of the method lays in the optimization of the rotation
matrices themselves rather than magnetization states.
Three healthy subjects were scanned with a 7 Tesla
scanner equipped with an 8-channel transceiver array.
Exploiting the full potential of parallel transmission
with the proposed methodology produced high quality
whole brain T2-weighted images with uniform signal and
contrast, requiring only 10 minutes of subject-specific
data acquisition and pulse design.
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