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Spin-echo images showing the effect of B0 inhomogeneity induced by a maximized x2−y2 shim. The volume was excited with (a) 2D chirp pulse, (b) 2D HS1 pulse, and (c) a Gaussian truncated 2D jinc pulse of 18 spiral turns and 13.14 ms duration. (d) B0 map obtained using the double gradient echo method. Desired ideal excitation profiles of the (e) 2D chirp pulse, (f) 2D HS1 pulse, and (g) 2D jinc pulse are shown for reference.
