Method and apparatus for reconstructing magnetic resonance images with phase noise-dependent selection of raw data

Abstract

In a method and magnetic resonance (MR) apparatus for producing an MR image of a subject, MR signals are acquired respectively with multiple MR signal reception channels, and with an ultra-high basic magnetic field in the MR data acquisition scanner. Each of the acquired MR signals has a phase and exhibiting phase noise, and the acquired MR signals from the multiple MR signal reception channels are entered into a computer, as raw data in which said phase noise is preserved. The computer calculates the respective phase noise of each MR signal reception channel relative to the phase noise in each other MR signal reception channel, and calculates a phase noise map from the relative phase noise calculation for each of said reception channels, the phase noise map representing a spatial distribution of phase noise over the multiple MR signal reception channels. The phase noise map is applied to said raw data and raw data are selected that, dependent on the phase noise map, have a phase noise that is below a predetermined threshold. MR image data are reconstructed only from the selected raw data.