PT  - JOURNAL ARTICLE
AU  - Y. Wu
AU  - W. Chang
AU  - K.M. Johnson
AU  - J. Velikina
AU  - H. Rowley
AU  - C. Mistretta
AU  - P. Turski
TI  - Fast Whole-Brain 4D Contrast-Enhanced MR Angiography with Velocity Encoding Using Undersampled Radial Acquisition and Highly Constrained Projection Reconstruction: Image-Quality Assessment in Volunteer Subjects
AID  - 10.3174/ajnr.A2048
DP  - 2011 Mar 01
TA  - American Journal of Neuroradiology
PG  - E47--E50
VI  - 32
IP  - 3
4099  - http://www.ajnr.org/content/32/3/E47.short
4100  - http://www.ajnr.org/content/32/3/E47.full
SO  - Am. J. Neuroradiol.2011 Mar 01; 32
AB  - SUMMARY: We report on the image quality obtained by using fast contrast-enhanced whole-brain 4D radial MRA with 0.75-second temporal resolution, isotropic submillimeter spatial resolution, and velocity encoding (HYPRFlow). Images generated by HYPR-LR by using the velocity-encoded data as the constraining image were of diagnostic quality. In addition, we demonstrate that measurements of shear stress within the middle cerebral artery can be derived from the high-resolution 3D velocity data. AVarteriovenousCE-VIPRcontrast-enhanced VIPRHYPRhighly constrained back-projectionHYPRFlowHYPR with phase contrast as constraintHYPR-LRHYPR local reconstructionMCAmiddle cerebral arteryMIPmaximum intensity projectionMRAMR angiographyPC-VIPRphase-contrast VIPRSNRsignal intensity–to-noise ratioVIPRvastly undersampled isotropic projection reconstructionWSSwall shear stress