Time-Resolved 3D Contrast-Enhanced MRA with 2D Homodyne and View Sharing for Contrast Bolus Dynamics of the Brain
Hu H, Madhuranthakam A, Kruger D, Campeau N, Huston 3rd J, Riederer S, Haider C
Mayo Clinic College of Medicine
Time-resolved (TR) imaging can effectively capture bolus dynamics in 3D contrast-enhanced (CE) MRA. Recently, an elliptical centric (EC) technique that encompasses projection-like sampling with 2D-homodyne (HD) reconstruction was demonstrated in non-TR CE-MRA. The sampling consists of a central ellipse and an outer annulus with alternating asymmetric vanes across the conjugate ky-kz axes. In this work, we hypothesize that this technique can be extended to TR imaging by updating the ellipse, selectively acquiring portions of the annulus, and performing HD for appropriate views during each reconstruction cycle. The method is demonstrated in intracranial vasculature with a 2.3 second frame rate.