Fig. 4From: Evaluation of 3D multi-contrast joint intra- and extracranial vessel wall cardiovascular magnetic resonanceOptimization of T2-weighted VISTA echo train. Panel (a) shows the optimization of RFA scheme on echo train length and refocusing flip angle. The optimized RFA scheme (b, c) can further improve the sharpness of vessel wall boundary (marked in yellow arrows) but cause SNR loss compared to VFA scheme (d, e)Back to article page