Rotating Frame of Reference It is convenient to define a rotating frame of reference which rotates about the Z axis at the larmor frequency. We distinguish this rotating coordinate stem from the laboratory system by primes on the X y axesⅩY A magnetization vector rotating at the larmor frequency in the laboratory frame appears stationary in a frame of reference rotating about the Z axis a transverse magnetization vector rotating about the Z axis at the same velocity as the rotating frame will appear stationary in the rotating frame THNMR YANRotating Frame of Reference It is convenient to define a rotating frame of reference which rotates about the Z axis at the Larmor frequency. We distinguish this rotating coordinate system from the laboratory system by primes on the X and Y axes, X'Y'. A magnetization vector rotating at the Larmor frequency in the laboratory frame appears stationary in a frame of reference rotating about the Z axis. A transverse magnetization vector rotating about the Z axis at the same velocity as the rotating frame will appear stationary in the rotating frame. THNMR YAN