Quiescent-interval slice-selective (QISS) is a robust nonenhanced 2D MRA technique, but has potential limitations regarding minimum slice thickness, slice profile, and fat suppression. We therefore implemented a breath-hold prototype 3D version of QISS which uses a thin-slab RF excitation, stack-of-stars k-space trajectory, and fast interrupted steady-state (FISS) readout instead of bSSFP. 2D and 3D QISS were compared for imaging of the coronary and renal arteries. Benefits of 3D QISS included better depiction of small branch vessels and improved quality for multi-planar reconstructions.
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