BALANCED PHASE CYCLING NON STATIONARY FREE PRECESSION SEQUENCE; BANDING ARTIFACT FREE IMAGING FOR MR MULTI-PARAMETRIC ESTIMATION

摘要

An MR excitation sequence comprises a repeated block (A) of excitation pulses. Each block (A) comprises a set of interleaved RF pulses with alternating small and large flip angle (α,γ) applied along different axes (x,y) to form a balanced sequence such as αx,γy,αy,γx. The sequence is simultaneously sensitive to various parameters such as PD, T1, T2, B1 and B0 keeping a high coherence and avoiding the formation of banding artifacts.