Abstract
Purpose
Late gadolinium enhancement cardiac MR (LGE-CMR) and extracellular volume fraction (ECV-CMR) are widely used to evaluate macroscopic and microscopic myocardial fibrosis. Macrocyclic contrast media are increasingly used off-label for myocardial scar assessment, given the superior safety profile of these agents. We aimed to assess the performance of two macrocyclic contrast agents, gadoterate meglumine and gadobutrol, for the evaluation of myocardial scar.
Material and methods
Forty subjects (61 ± 11 years, 67.5% men) who underwent LGE-CMR using gadobutrol were prospectively recruited for a research CMR scan using same-dose gadoterate meglumine (0.2 mmol/kg) at 1.5 T. Myocardial scar quantification was performed using a short-axis phase-sensitive inversion recovery (PSIR) Turbo-FLASH and steady-state free precession (SSFP) images. Pre- and post-contrast T1-mapping was employed to assess myocardial ECV. An intraclass correlation coefficient (ICC) was used to check for reliability between the two contrast agents.
Results
Using manual thresholding on PSIR Turbo-FLASH images, mean LGE scar percentage (LGE%) was 9.9 ± 9.7% and 9.4 ± 9.7% for gadobutrol and gadoterate meglumine, respectively (p > 0.05) (ICC: 0.99, 95% CI: 0.97–0.99). Using the PSIR SSFP technique and manual thresholding, LGE% averaged 7.5 ± 9.0% and 7.1 ± 8.6% for gadobutrol and gadoterate meglumine, respectively (p > 0.05) (ICC: 0.99, 95% CI: 0.98–0.99). Average ECV with gadobutrol and gadoterate meglumine were similar at 28.40 ± 4.88 and 28.46 ± 4.73 (p > 0.05) with a strong correlation (ICC: 0.98, 95% CI: 0.94–0.99).
Conclusion
We found LGE- and ECV-CMR values derived from gadoterate meglumine comparable to values derived from gadobutrol. Gadoterate meglumine has a comparable performance to gadobutrol in identifying LGE-derived myocardial scar both qualitatively and quantitatively.
Key Points
• Late gadolinium-enhancement cardiac MR (LGE-MR) and extracellular volume (ECV) fraction are widely used to evaluate macroscopic and microscopic myocardial fibrosis.
• Macrocyclic contrast media are increasingly used off-label for myocardial scar assessment, given the presumed superior safety profile of these agents.
• LGE- and ECV-CMR values derived from gadoterate meglumine are comparable to values derived from gadobutrol.
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Abbreviations
- CI:
-
Confidence interval
- CMR:
-
Cardiac magnetic resonance
- CNR:
-
Contrast-to-noise ratio
- ECV:
-
Extracellular volume
- GBCA:
-
Gadolinium-based contrast agents
- GFR:
-
Glomerular filtration rate
- ICC:
-
Intraclass correlation coefficients
- LGE:
-
Late gadolinium enhancement
- LV:
-
Left ventricle
- MOLLI:
-
Modified Look-Locker inversion recovery
- PSIR:
-
Phase-sensitive inversion recovery
- SI:
-
Signal intensity
- SNR:
-
Signal-to-noise ratio
- SSFP:
-
Steady-state free precession
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Acknowledgements
We would like to particularly thank all the patients who participated in our study.
Funding
This study has received funding by Geurbet, LLC.
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Guarantor
The scientific guarantor of this publication is Professor James C. Carr, MD.
Conflict of interest
Dr. James Carr and Dr. Jeremy Collins are members of the advisory board of Guerbet, LLC.
Statistics and biometry
No complex statistical methods were necessary for this paper.
Informed consent
Written informed consent was obtained from all subjects (patients) in this study.
Ethical approval
Institutional review board approval was obtained.
Methodology
• Prospective
• Diagnostic study
• Performed at one institution
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Rahsepar, A.A., Ghasemiesfe, A., Suwa, K. et al. Comprehensive evaluation of macroscopic and microscopic myocardial fibrosis by cardiac MR: intra-individual comparison of gadobutrol versus gadoterate meglumine. Eur Radiol 29, 4357–4367 (2019). https://doi.org/10.1007/s00330-018-5956-3
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DOI: https://doi.org/10.1007/s00330-018-5956-3