- Workshop presentation
- Open Access
Improving cardiac cine MRI on 3T using 2D k-t accelerated auto-calibrating parallel imaging
https://doi.org/10.1186/1532-429X-16-S1-W3
© Lai and Brau; licensee BioMed Central Ltd. 2014
- Published: 16 January 2014
Keywords
- Apical Slice
- Outer Band
- Banding Artifact
- Cardiac Cine
- Residual Artifact
Background
Recently, 3D cine has gained attention due to its capability for single breath-hold volumetric measurement [1]. Nonetheless, conventional 2D cine maintains two intrinsic advantages, namely, its superior blood-myocardium contrast owing to blood in-flow effects and reduced SSFP banding artifacts with more localized slice-by-slice shimming. These advantages are more prominent at high field. This work intends to optimize a k-t acceleration method, kat ARC [2], for 2D cine and preliminarily investigate its performance vs. 3D cine at 3T.
Methods
VDkt sampling pattern for 6x outer & 2x center net acceleration. (x: phase encoding, y: cardiac phases).
Results
Late systolic mid-ventricular slice using full k-space (a) and VDkt sampling with 3.6x (b), 5.0x (c) & 6.2x (d). Early-diastolic apical slice using full k-space (g) and VDkt with 3.6x (h), 5.0x (i) & 6.2x(j). (e) & (k) are 6.2x images using regular k-t sampling and VDkt without STR. (f) & (l) are 3D cine images with 9.6x.
Conclusions
In conclusion, the proposed approach is promising for highly accelerated 2D cine MRI. The 2D cine approach provides improved contrast and robustness vs. 3D cine and thus may be more reliable on 3T. 2D acquisition further enables flexible slice-specific selection of acceleration based on the extent of signal dynamics on each slice. Based on our results, the projected 2D cine scan time can be reduced to ~2 s/slice and totally two 16 s breath-holds for 16 slices - a reduction of 4-5x vs. full acquisition
Authors’ Affiliations
References
- Kozerke : MRM. 2004, 52.Google Scholar
- Lai : ISMRM. 2009, 766.Google Scholar
- Lai : ISMRM. 2013, 128.Google Scholar
Copyright
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.