Investigating the quantitative fidelity of prospectively undersampled chemical shift imaging in muscular dystrophy with compressed sensing and parallel imaging reconstruction
Version of Record online: 17 DEC 2013
© 2013 Wiley Periodicals, Inc.
Magnetic Resonance in Medicine
Volume 72, Issue 6, pages 1610–1619, December 2014
How to Cite
Hollingsworth, K. G., Higgins, D. M., McCallum, M., Ward, L., Coombs, A. and Straub, V. (2014), Investigating the quantitative fidelity of prospectively undersampled chemical shift imaging in muscular dystrophy with compressed sensing and parallel imaging reconstruction. Magn Reson Med, 72: 1610–1619. doi: 10.1002/mrm.25072
- Issue online: 11 NOV 2014
- Version of Record online: 17 DEC 2013
- Manuscript Accepted: 16 NOV 2013
- Manuscript Revised: 4 NOV 2013
- Manuscript Received: 9 SEP 2013
- Medical Research Council New Investigator Research. Grant Number: G1100160
- compressed sensing;
- muscular dystrophy
Fat fraction measurement in muscular dystrophy has an important role to play in future therapy trials. Undersampled data acquisition reconstructed by combined compressed sensing and parallel imaging (CS-PI) can potentially reduce trial cost and improve compliance. These benefits are only gained from prospectively undersampled acquisitions.
Eight patients with Becker muscular dystrophy were recruited and prospectively undersampled data at ratios of 3.65×, 4.94×, and 6.42× were acquired in addition to fully sampled data: equivalent coherent undersamplings were acquired for reconstruction with parallel imaging alone (PI). Fat fraction maps and maps of total signal were created using a combined compressed sensing/parallel imaging (CS-PI) reconstruction.
The CS-PI reconstructions are of sufficient quality to allow muscle delineation at 3.65× and 4.94× undersampling but some muscles were obscured at 6.42×. When plotted against the fat fractions derived from fully sampled data, non-significant bias and 95% limits of agreement of 1.58%, 2.17% and 2.41% were found for the three CS-PI reconstructions, while a 3.36× PI reconstruction yields 2.78%, 1.8 times worse than the equivalent CS-PI reconstruction.
Prospective undersampling and CS-PI reconstruction of muscle fat fraction mapping can be used to accelerate muscle fat fraction measurement in muscular dystrophy. Magn Reson Med 72:1610–1619, 2014. © 2013 Wiley Periodicals, Inc.