Local shimming system for magnetic resonance imaging

A shimming system for magnetic resonance imaging, which comprises:

• a multi-channel local shim coil unit, which is configured to be installed on an inspection table of a magnetic resonance imaging system, wherein the multi-channel local shim coil unit comprises a local multi-channel shim coil and a radio frequency receiving coil for receiving magnetic resonance signals, and the radio frequency receiving coil is placed inside the local multi-channel shim coil and separated by a distance from the local multi-channel shim coil;
• a computer control system, which is configured to install and set software controlled by a DC power and calculate field maps and calculate optimization processes;
• and
• a DC power system, which is communicatively connected to the computer control system to control a value of current of each channel;
• wherein the multi-channel local shim coil unit further comprises a housing, the housing has a semi-cylindrical configuration, and the local multi-channel shim coil is only distributed on a semi-cylindrical surface of the semi-cylindrical configuration of the housing;
• wherein the housing has a bottom provided with a hole as a reserved channel for ultrasound ablation treatment and the bottom is also provided with a positioning groove for positioning the radio frequency receiving coil.