On the Advantages of Retrospectively Gated Radial Acquisitions for Cine Phase Contrast Flow Imaging

Ashley Gould Anderson III¹, Andrew L. Wentland^1,2, Kevin M. Johnson¹, Oliver Wieben^1,2

Advantages of retrospective cardiac gating with radial acquisitions over prospectively gated Cartesian are presented. Two specific examples of phase contrast imaging where prospectively gated Cartesian sequences fail to capture important portions of the cardiac cycle are provided. The first example demonstrates the consequences of ECG trigger delay for measuring pulse wave velocity in the aorta. The second example highlights the ability to use a peripheral gating signal with retrospective gating where prospective gating would require an ECG.