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Figure 4.   Signal intensity as a function of gadopentetate dimeglumine (Gd-DTPA) concentration for various pulse sequences: spin echo (SE) (500/15); turbo spin echo (TSE) (500/15, echo train length of three); gradient and spin echo (GraSE) (500/15, echo train length of three, echo-planar imaging factor of three); 3D spoiled fast field echo (FFE) (8.8/2.8, 35° flip angle); 3D spoiled turbo field echo (TFE) (8/2.5, 20° flip angle); and two-dimensional (2D) nonspoiled fast field echo (111/2.3, 70° flip angle). mM = millimoles per liter.