In vivo brain viscoelastic properties measured by magnetic resonance elastography
Article first published online: 6 MAY 2008
Copyright © 2008 John Wiley & Sons, Ltd.
NMR in Biomedicine
Volume 21, Issue 7, pages 755–764, August 2008
How to Cite
Green, M. A., Bilston, L. E. and Sinkus, R. (2008), In vivo brain viscoelastic properties measured by magnetic resonance elastography. NMR Biomed., 21: 755–764. doi: 10.1002/nbm.1254
- Issue published online: 24 JUL 2008
- Article first published online: 6 MAY 2008
- Manuscript Accepted: 31 DEC 2007
- Manuscript Revised: 10 DEC 2007
- Manuscript Received: 19 JUN 2007
- Australian Research Council (ARC)
- viscoelastic properties
Magnetic resonance elastography (MRE) is a non-invasive imaging technique used to visualise and quantify mechanical properties of tissue, providing information beyond what can be currently achieved with standard MR sequences and could, for instance, provide new insight into pathological processes in the brain. This study uses the MRE technique at 3 T to extract the complex shear modulus for in vivo brain tissue utilizing a full three-dimensional approach to reconstruction, removing contributions of the dilatational wave by application of the curl operator. A calibrated phantom is used to benchmark the MRE measurements, and in vivo results are presented for healthy volunteers. The results provide data for in vivo brain storage modulus (G′), finding grey matter (3.1 kPa) to be significantly stiffer than white matter (2.7 kPa). The first in vivo loss modulus (G″) measurements show no significant difference between grey matter (2.5 kPa) and white matter (2.5 kPa). Copyright © 2008 John Wiley & Sons, Ltd.