A vector quantity indicating the ability of a magnetic field to exert a force on moving electric charges. It is equal to the magnetic flux density divided by the magnetic permeability of the space where the field exists. It is measured in amperes per meter.
gauss line is the only location where the static magnetic field strength is specified around an MR scanner.
radio frequency used, which in turn depends on the magnetic field strength.
The actual chemical shift depends on the radio frequency used, which in turn depends on the magnetic field strength.