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Quantitative inversion time prescription for myocardial late gadolinium enhancement using T1-mapping-based synthetic inversion recovery imaging: reducing subjectivity in the estimation of inversion time

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Abstract

To develop a quantitative T1-mapping-based synthetic inversion recovery (IRsynth) approach to calculate the optimal inversion time (TI0) for late gadolinium enhancement (LGE) imaging. Prospectively enrolled patients (n = 130, 58 ± 16 years) underwent cardiac MRI on a 1.5T system including Look-Locker TI-scout (LL), modified LL IR (MOLLI)-based T1-mapping, and LGE acquisitions. Patients were randomized into two groups: LL group (TI-scout followed T1-mapping) or MOLLI group (T1-mapping followed TI-scout). In both groups, the second acquisition was used to determine the TI0 for LGE. IRsynth images were generated from T1-maps between TI = 200–400 ms in 5 ms increments. Image quality was rated on a 3-point scale and the remote/background signal intensity ratio (SIR) was calculated. In the LL group (n = 53), the TI-scout-based TI0 was significantly shorter compared to IRsynth [230 ms (219–242) vs. 280 ms (263–297), P < 0.0001]. The TI0 used for LGE was set 30–40 ms longer [261 ms (247–276), P < 0.0001] than the TI-scout-based TI0, resulting in a TI0 ~ 20 ms shorter than what was obtained by IRsynth (P = 0.0156). In the MOLLI group (n = 63), IRsynth-based TI0 was significantly longer than the TI-scout-based TI0 [298 ms (262–334) vs. 242 ms (217–267), P = 0.0313]. The quality of myocardial nulling was rated higher [2.4 (2.2–2.5) vs. 2.0 (1.8–2.1), P = 0.0042] and the remote/background SIR was found to be more optimal (1.6 [1.1–2.1] vs. 2.6 [1.8–3.3], P = 0.0256) in the MOLLI group. T1-based IRsynth selects TI0 for LGE more accurately than conventional TI-scout imaging. IRsynth improves TI0 selection by providing excellent visualization of the representative image contrast for LGE images, reducing operator dependence in LGE acquisition.

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Correspondence to U. Joseph Schoepf.

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UJS is a consultant for and/or receives research support from Astellas, Bayer, GE Healthcare, and Siemens. CNDC and AVS are consultants for and/or receive research support from Guerbet and Siemens. WGR is an employee of Siemens. The other authors have no conflict of interest and had control of the data submitted for publication.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the local Institutional Review Board and with the Health Insurance Portability and Accountability Act.

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Gassenmaier, S., van der Geest, R.J., Schoepf, U.J. et al. Quantitative inversion time prescription for myocardial late gadolinium enhancement using T1-mapping-based synthetic inversion recovery imaging: reducing subjectivity in the estimation of inversion time. Int J Cardiovasc Imaging 34, 921–929 (2018). https://doi.org/10.1007/s10554-017-1294-9

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  • DOI: https://doi.org/10.1007/s10554-017-1294-9

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