Abstract: A method and system for receiving magnetic resonance signals, and a magnetic resonance imaging system are provided. The method includes dividing coil units in a receiving coil array into different coil unit groups. For each of the coil unit groups, correlations are established between carrier frequencies and the signals received by each coil unit in the coil unit group. Low noise amplification is performed, and filtering and frequency mixing is performed on the signals received by all the coil units in the coil unit group according to the correlations to obtain intermediate frequency signals borne on the respectively corresponding carrier frequencies of an identical channel. After performing amplification and filtering on the intermediate frequency signals, the intermediate frequency signals are output to an analog-to-digital conversion unit to perform digital sampling so as to obtain digital domain signals.

Abstract: The process distinguishes image rays and actual rays generated in a frequency converting device from frequency rays of an input signal. The frequency converting device comprises at least a mixer mixing the input signal and a signal provided by a local oscillator and a filter assembly filtering the mixed signals output by the mixer. At least one sweep is carried out wherein the frequency of the local oscillator is varied and wherein the signal level at the output of the frequency converting device is recorded for a set of converted frequencies. A further sweep is carried out so that the frequency of the actual ray generated in the further sweep by an input ray is the same as the frequency of the actual ray generated in said at least one sweep by said input ray and the frequency of the image ray generated in said further sweep by any input ray does not correspond to a frequency for which a ray was generated in each of said at least one sweep.