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; W Chang; K M Johnson; J Velikina; H Rowley; C Mistretta; P Turski

doi:10.3174/ajnr.A2048

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

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

Authors

Y Wu¹, W Chang, K M Johnson, J Velikina, H Rowley, C Mistretta, P Turski

Affiliation

¹ Department of Medical Physics, University of Wisconsin, Madison, 53705, USA. yijingwu@wisc.edu

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.

Publication types

Research Support, N.I.H., Extramural

MeSH terms

Adult
Algorithms*
Brain / blood supply*
Cerebral Angiography / methods
Cerebral Arteries / anatomy & histology*
Female
Humans
Image Enhancement / methods
Image Interpretation, Computer-Assisted / methods*
Magnetic Resonance Angiography / methods*
Male
Reproducibility of Results
Sample Size
Sensitivity and Specificity
Young Adult

Abstract

Publication types

MeSH terms

Grants and funding