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Keywords:
Ischaemia / Infarction, Imaging sequences, MR-Functional imaging, Cardiac
Authors:
A. Celik1, D. Ahmad2, M. Alfaris2, E. Anazi2, G. Slavin3, P. Ghedin4, A.-M. Mouaz2, A. Brau5; 1Antalya/TR, 2Riyadh/SA, 3Bethesda/US, 4milwaukee/US, 5Munich/DE
DOI:
10.1594/ecr2016/C-0450
Results
The measured native T1 values were 1243 ± 43ms,
1453 ± 92ms and 1610 ± 160ms for remote myocardium,
infarcted myocardium and blood,
respectively,
as shown in Fig.1.
An MDE image and corresponding T1 map are shown in Fig.2 and Fig.3 illustrating infarcted (white arrow) and remote myocardium.
The measured remote myocardium T1 values are consistent with the reported T1 values in the literature using single-point saturation recovery methods [3,
4]. The measured myocardial infarct T1 values were significantly higher (p < 0.05) than the remote myocardium in this study.
The results show that SMART1Map provides fast and robust T1 values under pathological conditions.
The native remote myocardium T1 values measured in this study are in good agreement with previously reported values using single-point saturation recovery.
In addition,
the significantly higher T1 values measured here in infarcted myocardium is consistent with previous studies measuring the native T1 of acute infarct using other T1 mapping methods [5-8].
The agreement of the remote/normal myocardium T1 values with prior studies underscores the robustness of this method.
Because SMART1Map is a single-point method,
the measured T1 values are independent of heart rate.
Similarly,
the measured T1 is independent of imaging parameters,
thus allowing individual clinics to develop their own protocols.This is in contrast to Looker-Locker methods,
such as MOLLI,
where the measured apparent T1 is both heart-rate- and protocol-dependent.