Patent ID: 6545472
Filing Date: 2003-04-08
Classification: G01R

Abstract:
In a magnetic resonance imaging system including a plurality of receiver antennas for acquiring a plurality of magnetic resonance signals via a plurality of signal channels, wherein each receiver antenna has a respective sensitivity profile and wherein a noise correlation between individual signal channels is represented by a first noise correlation matrix,a magnetic resonance imaging method for forming a magnetic resonance image, said method comprising: acquiring a plurality of magnetic resonance signals with sub-sampling; resampling a plurality of regularly resampled magnetic resonance signals on a regular sampling grid from the acquired sub-sampling of magnetic resonance signals; replacing the first noise correlation matrix with a second noise correlation matrix approximated by a block diagonal matrix or a band diagonal matrix, wherein matrix elements of the second noise correlation matrix situated outside a predetermined band around a main diagonal of the second noise correlation matrix have the value zero; and reconstructing the magnetic resonance image from the regularly resampled magnetic resonance signals which have been sampled from the acquired magnetic resonance signals on the basis of the sensitivity profiles and the second noise correlation matrix.