Distributed spirals: A new class of three-dimensional k-space trajectories
Article first published online: 5 OCT 2012
© 2012 Wiley Periodicals, Inc.
Magnetic Resonance in Medicine
Volume 70, Issue 2, pages 413–419, August 2013
How to Cite
Turley, D. C. and Pipe, J. G. (2013), Distributed spirals: A new class of three-dimensional k-space trajectories. Magn Reson Med, 70: 413–419. doi: 10.1002/mrm.24475
- Issue published online: 23 JUL 2013
- Article first published online: 5 OCT 2012
- Manuscript Accepted: 7 AUG 2012
- Manuscript Revised: 1 AUG 2012
- Manuscript Received: 23 MAY 2012
- spiral MRI;
- golden angle;
- k-space trajectory
This work presents a new class of three-dimensional spiral based-trajectories for sampling magnetic resonance data. The distributed spirals trajectory efficiently traverses a cylinder or sphere or intermediate shape in k-space. The trajectory is shown to be nearly as efficient as a conventional stack of spirals trajectory in terms of scan time and signal-to-noise ratio, while reducing coherent aliasing in all three spatial directions and reducing Gibbs ringing due to the nature of collecting data from a sphere in k-space. The trajectory uses a single two-dimensional spiral waveform with the addition of a single orthogonal waveform which is scaled with each repetition, making it relatively easy to implement. Blurring from off-resonance only occurs in two dimensions due to the temporal nature of the sampling. Magn Reson Med 70:413–419, 2013. © 2012 Wiley Periodicals, Inc.