Abstract #2268
Eddy current correction in diffusion-weighted STEAM MRS in the presence of water and fat peaks
Stefan Ruschke 1 , Thomas Baum 1 , Hendrik Kooijman 2 , Marcus Settles 1 , Axel Haase 3 , Ernst J. Rummeny 1 , and Dimitrios C. Karampinos 1
1
Department of Diagnostic and Interventional
Radiology, Technische Universitt Mnchen, Munich,
Germany,
2
Philips
Healthcare, Hamburg, Germany,
3
Zentralinstitut
fr Medizintechnik, Technische Universitt Mnchen,
Garching, Germany
Eddy current effects can distort peak line shapes in
DW-MRS, inducing asymmetric peaks and causing bias in
the peak area quantification. Previous approaches
require a reference signal to correct for eddy current
effects. However, finding a reference signal is not
always feasible in the presence of water and fat peaks.
In the present work, an approach acquiring spectra with
opposite diffusion gradient polarities and using an
appropriate signal combination routine is proposed to
correct for eddy current effects. Examples from the
application of the proposed approach are shown in bone
marrow and skeletal muscle, where both water and fat
peaks are present.
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