Abstract #4440
Acoustic noise optimized Diffusion-Weighted Imaging (DWI)
Martin Ott 1 , David Porter 2 , Felix Breuer 1 , David Grodzki 2 , Martin Blaimer 1 , Bjrn Heismann 2 , and Peter Jakob 1,3
1
MRB Forschungszentrum fr
Magnet-Resonanz-Bayern e.V., Wrzburg, Bavaria, Germany,
2
Siemens
AG, Erlangen, Bavaria, Germany,
3
Department
of Experimental Physics 5, University of Wuerzburg,
Wrzburg, Germany
Diffusion-Weighted Imaging (DWI) is one of the loudest
and most challenging sequence in terms of acoustic-noise
due to the requirement of strong and fast switching
gradients. In this work, among other gradient
optimizations, a rs-EPI readout is modified to
consequently minimize slew rates and hence
acoustic-noise. Methodical modifications are presented
as well as corresponding acoustic-noise measurements. A
significant reduction in acoustic-noise of over 15dB(A)
could be achieved. In-vivo imaging results are compared
to standard methods like single-shot EPI.
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