Berkin Bilgic1, Jonathan R Polimeni1, Lawrence L Wald1, and Kawin Setsompop1
automated method for tissue phase and susceptibility estimation from
multichannel data is proposed. Using ESPIRiT with virtual body coil calibration
on multichannel data, phase-sensitive coil combination is achieved without an
additional reference acquisition. This is shown to perform similarly to SNR-optimal
Roemer combination that requires additional reference body and head coil acquisitions.
Estimation of the tissue phase from the combined data is posed as a regularized
inverse problem using the spherical mean value property. The extension of the
technique to single-step Quantitative Susceptibility Mapping is also
demonstrated on 2D, 3D and Simultaneous MultiSlice data.