The effect of echo time sampling on B0 field map estimation for QSM of liver iron overload
Samir D. Sharma 1 , Diego Hernando 1 , and Scott B. Reeder 1,2
Radiology, University of Wisconsin -
Madison, Madison, WI, United States,
Physics, University of Wisconsin - Madison, Madison,
Wisconsin, United States
Precise estimation of the B0 field map is a critical
component of quantitative susceptibility mapping (QSM).
Using QSM, it may be possible to estimate the liver iron
concentration (LIC) from the B0 field map. However, in
order for this B0-based measurement of LIC to be precise
(i.e. have low standard deviation), the estimate of the
B0 field itself must be precise. In this work, we have
analyzed the theoretical effects of the echo time
sampling on the precision of the B0 field map estimate,
and further, translated these results into precision
limits of the LIC estimate.
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