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To develop velocity‐selective (VS) MR angiography (MRA) protocols for arteriography and venography with whole‐brain coverage.

Tissue suppression using velocity‐selective saturation (VSS) pulse trains is sensitive to radiofrequency field (B₁+) inhomogeneity. To reduce its sensitivity, we replaced the low‐flip‐angle hard pulses in the VSS pulse train with optimal composite (OCP) pulses. Additionally, new pulse sequences for arteriography and venography were developed by placing spatially selective inversion pulses with a delay to null signals from either venous or arterial blood. The VS MRA techniques were compared to the time‐of‐flight (TOF) MRA in six healthy subjects and two patients at 3T.

More uniform suppression of stationary tissue was observed when the hard pulses were replaced by OCP pulses in the VSS pulse trains, which improved contrast ratios between blood …