The invention provides for an MRI system (100) with an RF system for acquiring magnetic resonance data (142). The RF system comprises a set of antenna elements (126). The MRI system (100) further comprises a processor for controlling the MRI system (100). Magnetic resonance data is acquired. Combined image data (144) is reconstructed. The reconstruction comprises transforming the acquired magnetic resonance data (142) from k-space to image space and combining the resulting image data. For each antenna element (126) magnetic resonance data (146) is simulated using the reconstructed combined image data (144). The simulation comprises transforming the reconstructed combined image data (144) from image space to k-space. A phase correction factor is determined, The determination comprises calculating phase differences between the acquired magnetic resonance data (142) and the simulated magnetic resonance data (146). The acquired magnetic resonance data (142) is corrected using the phase correction factor. In this way, the invention allows for correcting phase errors caused e.g. by subject motion such as respiration by B0 off-resonances, etc.
