Abstract #3326
On the feasibility of QSM in MR-invisible regions
Diego Hernando 1 , Debra E. Horng 1,2 , Samir D. Sharma 1 , and Scott B. Reeder 1,2
1
Radiology, University of Wisconsin-Madison,
Madison, WI, United States,
2
Medical
Physics, University of Wisconsin-Madison, Madison, WI,
United States
QSM has the potential to probe MR-invisible objects,
based on the effect of their magnetic susceptibility on
the nearby B0 field in MR-visible regions. However, the
fundamental ability to map magnetic susceptibility of
MR-invisible objects based on nearby B0 measurements has
not yet been characterized. In this work, we address
this question with phantom experiments and singular
value decomposition analysis. Our results demonstrate
that susceptibility measurement may be feasible in
MR-invisible regions if the susceptibility distribution
can be assumed to be homogeneous over the MR-invisible
region of interest. However, susceptibility mapping of
spatially-varying susceptibility distributions in
MR-invisible regions is an inherently challenging
problem.
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