Quiescent-inflow single-shot magnetic resonance angiography using a highly undersampled radial k-space trajectory
Article first published online: 24 JAN 2013
Copyright © 2012 Wiley Periodicals, Inc.
Magnetic Resonance in Medicine
Volume 70, Issue 6, pages 1662–1668, December 2013
How to Cite
Edelman, R. R., Giri, S., Dunkle, E., Galizia, M., Amin, P. and Koktzoglou, I. (2013), Quiescent-inflow single-shot magnetic resonance angiography using a highly undersampled radial k-space trajectory. Magn Reson Med, 70: 1662–1668. doi: 10.1002/mrm.24596
- Issue published online: 18 NOV 2013
- Article first published online: 24 JAN 2013
- Manuscript Accepted: 26 NOV 2012
- Manuscript Revised: 1 NOV 2012
- Manuscript Received: 5 SEP 2012
- The Grainger Foundation
- National Institutes of Health. Grant Number: 1R01HL096916
- nonenhanced MR angiography;
- radial k-space trajectory;
- highly accelerated MRI;
- quiescent-inflow single-shot;
- peripheral arterial disease
We hypothesized that high undersampling factors could be used in conjunction with radial quiescent-inflow single-shot magnetic resonance angiography (MRA) to accelerate the data acquisition and enable multislice acquisitions.
Seven subjects were imaged on a 1.5 T MRI system. For multislice quiescent-inflow single-shot MRA, the venous saturation radiofrequency pulse, in-plane saturation radiofrequency pulse, and quiescent interval were applied only once before the first slice.
The mean (standard deviation) measurements for the intra-arterial signal-to-noise ratio were as follows: Cartesian 1 slice—29.3 (5.5); radial 1 slice, 92 views—22.3 (3.6); radial 1 slice, 46 views—18.5 (2.0); radial 2 slices, 46 views—18.3 (3.2); and radial 3 slices, 32 views—21.7 (3.9), normalized for pixel size to 15.8. Horizontal striping was present with multislice radial quiescent-inflow single-shot MRA (especially with the three-slice acquisition) due to variable T1 relaxation between the concurrently acquired slices, but the image quality remained diagnostic. Vascular pathology in patients with peripheral arterial disease was well shown by all techniques.
Very high undersampling factors in excess of 18 have been demonstrated for nonenhanced MRA using a radial quiescent-inflow single-shot technique, enabling the acquisition of two to three slices per cardiac cycle. Scan time for a complete peripheral MRA could be shortened to 2 min or less. Magn Reson Med 70:1662–1668, 2013. © 2012 Wiley Periodicals, Inc.