MR images of agarose phantoms obtained using 2D spiral (A, B, C) and 3D MAPSS (D, E, F) sequences. Phantoms were created by dissolving agarose powder in deionized water at concentrations of 2% (A, C), 3% (B, D) or 4% (C, E) by weight. For analysis, rectangular regions of interest in near the center of the image were created as shown.