Dabir, D, Child, N, Kalra, A et al. (15 more authors) (2014) Reference values for healthy human myocardium using a T1 mapping methodology: results from the International T1 Multicenter cardiovascular magnetic resonance study. Journal of Cardiovascular Magnetic Resonance, 16. 1. 69 - 69. ISSN 1097-6647
Abstract
BACKGROUND:T1 mapping is a robust and highly reproducible application to quantify myocardial relaxation of longitudinal magnetisation. Available T1 mapping methods are presently site and vendor specific, with variable accuracy and precision of T1 values between the systems and sequences. We assessed the transferability of a T1 mapping method and determined the reference values of healthy human myocardium in a multicenter setting.METHODS:Healthy subjects (n = 102; mean age 41 years (range 17-83), male, n = 53 (52%)), with no previous medical history, and normotensive low risk subjects (n=113) referred for clinical cardiovascular magnetic resonance (CMR) were examined. Further inclusion criteria for all were absence of regular medication and subsequently normal findings of routine CMR. All subjects underwent T1 mapping using a uniform imaging set-up (modified Look- Locker inversion recovery, MOLLI, using scheme 3(3)3(3)5)) on 1.5 Tesla (T) and 3 T Philips scanners. Native T1-maps were acquired in a single midventricular short axis slice and repeated 20 minutes following gadobutrol. Reference values were obtained for native T1 and gadolinium-based partition coefficients, lambda and extracellular volume fraction (ECV) in a core lab using standardized postprocessing.RESULTS:In healthy controls, mean native T1 values were 950 +/- 21 msec at 1.5 T and 1052 +/- 23 at 3 T. lambda and ECV values were 0.44 +/- 0.06 and 0.25 +/- 0.04 at 1.5 T, and 0.44 +/- 0.07 and 0.26 +/- 0.04 at 3 T, respectively. There were no significant differences between healthy controls and low risk subjects in routine CMR parameters and T1 values. The entire cohort showed no correlation between age, gender and native T1. Cross-center comparisons of mean values showed no significant difference for any of the T1 indices at any field strength. There were considerable regional differences in segmental T1 values. lambda and ECV were found to be dose dependent. There was excellent inter- and intraobserver reproducibility for measurement of native septal T1.CONCLUSION:We show transferability for a unifying T1 mapping methodology in a multicenter setting. We provide reference ranges for T1 values in healthy human myocardium, which can be applied across participating sites.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 Dabir et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Mar 2015 15:15 |
Last Modified: | 07 Dec 2022 14:59 |
Published Version: | http://dx.doi.org/10.1186/s12968-014-0069-x |
Status: | Published |
Publisher: | Biomed Central |
Refereed: | Yes |
Identification Number: | 10.1186/s12968-014-0069-x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:81409 |