Quantitative Susceptibility Mapping is an imaging technique for obtaining information of the magnetic susceptibility from phase images. If the phase information is obtained from a coil composed of multiple receive elements (coil array), the resulting images need to be combined. This step is non-trivial, and several algorithms, with different performances, have been proposed. Here we compare two different coil combination algorithms: the adaptive combine method and a recently proposed extension of ESPIRiT. For each, we compared both single subject and group-averaged QSM maps, where we observed that the results are sensitive to the method used for coil combination.
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