Improved 2D time‐of‐flight angiography using a radial‐line k‐space acquisition

For flow imaging applications, radial‐line k‐space acquisition methods offer advantages over conventional 2DFT methods. Specifically, radial‐line acquisition methods mitigate artifacts resulting from pulsatile flow while offering a potential reduction in scan times. In this paper, radial‐line and 2DFT acquisitions are compared in a two‐dimensional time‐of‐flight angiography sequence. The twisting radial‐line (TwiRL) trajectory, a variant of 2D projection reconstruction, is used to represent the family of radial‐line trajectories. In both phantom and in vivo studies, the TwiRL images demonstrate improved vessel depiction including a more uniform signal intensity and better delineation of the vasculature in comparison with images obtained via the 2DFT method.

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