Diagrams of a conventionally masked (a) and vascular-masked (b) abdomen cross-section with enhanced right and left renal arteries (RRA, LRA), perfused right and left kidneys (RK, LK), and enhanced abdominal aorta (Ao). With 4 × 2 Cartesian SENSE acceleration, a voxel within the aorta is aliased with seven other voxels (gray). Three of the aliased voxels are in air and contain no signal in the unsubtracted case, while in the subtracted case an additional four voxels contain subtracted static tissue. Conventional masking removes the three non-signal-producing aliased voxels in air. In this example, vascular masking removes all seven of the non-signal-producing aliased voxels.