Adaptive reconstruction (AR) can be used to
combine multichannel images without acquiring coil sensitivity information. It
can improve the SNRs of combined magnitude and phase images. But the
reconstructed phase images may suffer from open-ended fringe artifacts when
coil-sensitivity maps vary a lot. We propose a two-step adaptive reconstruction
method to combine multichannel images. This method is shown to be more robust
than the traditional AR method and can still maintain the high SNR.