Gradients in Ultra High Field (UHF) MRI

Abstract

The gradients are one of the three magnetic field generating units that are necessary to make MRI work. While the other two types of fields are directly affected by the strength of the main magnet—the static magnetic field, B o , and the RF (radio frequency) fields by the Larmor frequency depending linear on the static magnetic field strength—the same set of gradients is able to work at any static field strength. The principle design goals for gradients in UHF are the same as in standard MRI. Nevertheless, it is advisable to adapt the gradient system to the challenging working conditions in an UHF environment.