Journal article


Reduction of Respiratory Motion Artifacts for Free-Breathing Whole-Heart Coronary MRA by Weighted Iterative Reconstruction


Publication Details
Author(s): Forman C, Piccini D, Grimm R, Hutter JM, Hornegger J, Zenge MO
Publisher: Wiley-Blackwell
Publication year: 2014
Volume: 0
Journal issue: 0
Pages range: 1-11
ISSN: 0740-3194

Abstract

Purpose: To combine weighted iterative reconstruction with self-navigated free-breathing coronary magnetic resonance angiography for retrospective reduction of respiratory motion artifacts. Methods: One-dimensional self-navigation was improved for robust respiratory motion detection and the consistency of the acquired data was estimated on the detected motion. Based on the data consistency, the data fidelity term of iterative reconstruction was weighted to reduce the effects of respiratory motion. In vivo experiments were performed in 14 healthy volunteers and the resulting image quality of the proposed method was compared to a navigator-gated reference in terms of acquisition time, vessel length, and sharpness. Result: Although the sampling pattern of the proposed method contained 60% more samples with respect to the reference, the scan efficiency was improved from 39.5±10.1% to 55.1±9.1%. The improved self-navigation showed a high correlation to the standard navigator signal and the described weighting efficiently reduced respiratory motion artifacts. Overall, the average image quality of the proposed method was comparable to the navigator-gated reference. Conclusion: Self-navigated coronary magnetic resonance angiography was successfully combined with weighted iterative reconstruction to reduce the total acquisition time and efficiently suppress respiratory motion artifacts. The simplicity of the experimental setup and the promising image quality are encouraging toward future clinical evaluation. © 2014 Wiley Periodicals, Inc.



How to cite
APA: Forman, C., Piccini, D., Grimm, R., Hutter, J.M., Hornegger, J., & Zenge, M.O. (2014). Reduction of Respiratory Motion Artifacts for Free-Breathing Whole-Heart Coronary MRA by Weighted Iterative Reconstruction. Magnetic Resonance in Medicine, 0(0), 1-11. https://dx.doi.org/10.1002/mrm.25321

MLA: Forman, Christoph, et al. "Reduction of Respiratory Motion Artifacts for Free-Breathing Whole-Heart Coronary MRA by Weighted Iterative Reconstruction." Magnetic Resonance in Medicine 0.0 (2014): 1-11.

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