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. 2011 Mar;32(3):E47-50.
doi: 10.3174/ajnr.A2048. Epub 2010 Mar 11.

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

Y Wu  1 , W Chang, K M Johnson, J Velikina, H Rowley, C Mistretta, P Turski
Affiliations

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

Y Wu et al. AJNR Am J Neuroradiol. 2011 Mar.

Abstract

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.

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Figures

Fig 1.
Fig 1.
A, Sagittal HYPRFlow timeframe in the early arterial phase. B, Sagittal HYPRFlow timeframe in the late arterial phase. C, Sagittal HYPRFlow timeframe in the venous phase. D, Coronal HYPRFlow timeframe in the arterial phase. E, Sagittal PC-VIPR MIP. F, WSS map of the axial whole brain generated from PC-VIPR velocity data.
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