Spiral spin-echo and dual spin-echo sequences have been implemented for knee imaging at 1.5T with in-plane resolution of 0.51 by 0.51 mm2. High-quality proton density-weighted, T2-weighted and T1-weighted water and fat images at various orientations can be obtained using spiral Dixon imaging with comparable total scan time as the conventional Cartesian fast (turbo) spin-echo sequences without Dixon. Spiral T2-weighted water images demonstrated better fat suppression and a 24-67% increase of signal-to-noise ratio compared to fat-suppressed Cartesian reference images.
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