Whole-brain arteriography and venography: Using improved velocity-selective saturation pulse trains.

ABSTRACT:

Purpose

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

Methods

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.

Results

More uniform suppression of stationary ti

SUBMITTER: Li W 

PROVIDER: S-EPMC5809237 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature