Description
In the realm of MRI machines, low-to-mid field systems (e.g. permanent magnet scanners) have been nearly abandoned for high-field, high-performance systems (e.g. superconducting scanners). However, recent improvements in MR hardware, algorithms and computation are stimulating a resurgence in interest of upgrading lower-end magnets to achieve high-performance with significantly lower cost, greater accessibility, and more relaxed siting requirements. Towards this goal, we propose an upgrade for a wrist 1T permanent-magnet system in the form of a simple B0 shim array integrated onto a solenoid TRX coil for reducing B0 through localized targeted shimming. We demonstrate improved homogeneity using a 16-channel prototype array with negligible effects on the transmit field and received SNR.