ABSTRACT
(Magnetic Resonance) The static magnetic field strength in an MRI system is conventionally indicated with B 0. It is usually expressed in units of Tesla (1 T = 104 G). The z-direction is commonly chosen along the direction of B 0, although exceptions may occur in open MRI systems. In current MRI systems, B 0 has a constant value over time, ranging from 0.02 to 3 T. Currently, experimental MRI systems have a field strength of up to 11 T and in MRS, field strength is usually indicated by the proton frequency, for example 600 MHz for 14 T.
