TY - JOUR T1 - 3D Time-Resolved Contrast-Enhanced Cerebrovascular MR Angiography with Subsecond Frame Update Times Using Radial <em>k</em>-Space Trajectories and Highly Constrained Projection Reconstruction JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 2001 LP - 2004 DO - 10.3174/ajnr.A0772 VL - 28 IS - 10 AU - Y. Wu AU - N. Kim AU - F.R. Korosec AU - A. Turk AU - H.A. Rowley AU - O. Wieben AU - C.A. Mistretta AU - P.A. Turski Y1 - 2007/11/01 UR - http://www.ajnr.org/content/28/10/2001.abstract N2 - SUMMARY: HYPR TRICKS is an acquisition method that combines radial k-space trajectories, sampling k-space at different rates (TRICKS), and a new strategy for image reconstruction that uses highly constrained backprojection reconstruction (HYPR). This approach provides 3D time-resolved contrast-enhanced MR angiograms of the cerebral vessels with subsecond frame update times and submillimeter in-plane spatial resolution. Artifacts are suppressed, and signal-to-noise ratio is well maintained, by using HYPR reconstruction. ER -