Fig. 1.

A cartoon illustration of the signal model and the scheme of the solver. (A)Signal of a voxel with mixture of paramagnetic and diamagnetic sources can be decomposed into three pools of signal contributions. The signal outside the susceptibility sources has zero phase. (B) A flowchart of the proposed algorithm. The algorithm takes inputs of echo-time-dependent QSM and Magnitude to compose the local signal. The proposed alternating direction solver processes the local signal and outputs the estimated unknowns. With the estimated parameters, maps of paramagnetic component susceptibility (PCS) and diamagnetic component susceptibility (DCS) are constructed respectively.