Carson Ingo1, Wyger M. Brink1, Andrew G. Webb1, and Itamar Ronen1
Diffusion-weighted 7T MR spectroscopy in white matter
regions of the brain using ultrahigh b-factors have established that
intracellular metabolites exhibit non-Gaussian diffusion. Such measurements using
b-factors well above 10,000 s/mm2 have inherently low SNR, and so it is crucial to
optimize B1 sensitivity to ensure reliable results. Here we show
that a single high permittivity pad can increase the receive sensitivity by
~30%, resulting in potential reductions in data acquisition time of ~70%.