Magnetic resonance system with spatial selectivity and working method thereof

A magnetic resonance (MR) system with spatial selectivity, comprising:

• a data display and processing module, a spectrometer with at least one transmission channel, at least one power amplifier connected in a one-to-one correspondence to the transmission channel of the spectrometer, a transmit-receive (TR) switch, a preamplifier, a plurality of sets of coils, and a magnet module, wherein
• the data display and processing module is connected to the spectrometer;
• the spectrometer is separately connected to the at least one power amplifier, the TR switch, and the preamplifier;
• and the TR switch is separately connected to the preamplifier and a main coil corresponding to a target area;
• the spectrometer comprises any combination of a single-channel transmission spectrometer and/or a multi-channel transmission spectrometer;
• when a number of transmission channels of the combined spectrometer is greater than or equal to a number of coils, one power amplifier is connected to the TR switch, while other power amplifiers are connected in a one-to-one correspondence to other coils except for the main coil;
• and when the number of the transmission channels of the combined spectrometer is less than the number of the coils, an output terminal of the at least one power amplifier is connected to at least one power divider, and an output terminal of the at least one power divider is connected to phase shifters corresponding to the number of the coils, wherein one phase shifter or power amplifier is connected to the TR switch, while remaining phase shifters are connected in a one-to-one correspondence to the other coils except for the main coil;
• and
• radio frequency (RF) fields and excitation areas generated by each set of coils vary;
• and a difference between the RF field generated by the main coil corresponding to the target area and the RF fields generated by the other coils is greater than a preset value.