Therefore, the component of B 1 will appear stationary. In this frame also the precessing magnetization components appear to be stationary that leads to the disappearance of B 0, and we need only to consider B 1 and M 0. The M 0 vector is under the influence of the stationary field B 1, leading to another precession of M 0, this time around B 1 at the frequency ω 1.