Download Combined Background Field Removal and Reconstruction for

Combined Background Field Removal and Reconstruction for
Quantitative Susceptibility Mapping
Maximilian März
Quantitative Susceptibility Mapping (QSM) is an emerging Magnetic Resonance Imaging
(MRI) technique that provides in-vivo measurements of the magnetic susceptibility of, e.g.,
brain tissue. In practice, QSM requires solving a series of challenging inverse problem. Here,
we will address two important steps, the removal of the background field, which is caused
by sources outside the Region of Interest (ROI), and secondly, the reconstruction of dipole
sources. In the recent past both problems have received attention, however, despite a large
interdependence, each of it has been treated separately. We propose a new method that makes
use of synergy effects by combining both steps. We demonstrate with numerical experiments
that a combined treatment provides a better reconstruction of dipole sources close to the
boundary of the ROI.
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